Irish Immigrants and Scottish Society Essay Example | Topics and Well Written Essays - 1500 words

Irish Immigrants and Scottish Society - Essay Example The arrival of the large mass of Irish immigrants belonging to lower social classes and carrying no educational values, but only the desire to survive, made it difficult for both sides to coexist and found the basis of a new society. The immigrants brought with them the religious and ideological conflict between Catholics and Protestants and supplemented in this way a problem that haunted British history from early times. As Tom Devine discusses in his paper there is a major crisis that started with the first wave of immigrants who came from area belonging to what is nowadays the Republic of Ireland and who were mostly Catholics. In such conditions, generated by what should be interpreted as the fled from famine and not immigration per se, the identity of the Irish immigrants transformed itself in a very spectacular way. Their values that were founded on religious beliefs represented an impediment in the process of assimilation that was supposed to take place between the Scottish society and its values and the newly arrived. The differences between the Irish and the Scottish are not to be analyzed only in terms of religion, but also from a social perspective; the nineteenth century meant for Scotland industrialization, new means of work and production that were not present in the rural Ireland. Lack of systematization of work generated not only the difficulties related to food in Ireland, but it triggered problems such unemployment and lack of education and working skills. After the first wave of immigrants, in the years following 1800, the Irish who came to Scotland carried with them a different aspect of Irish identity and, as Tom Devine points out, the interaction with the Scots was starting to open new paths, and the relationship between the two waves of immigration unveiled the fact that there were significant differences of mentality between them and that in the first decades there has been an agrarian improvement in Ireland and that Protestants developed a different intellect and thus were able to cope better with the new social environment. Comparing the two movements, the first one, the Catholics, were driven to Scotland by famine, these people who formed in Ireland a crafting society changed their lives in a significant way, leaving behind their rural homelands and throwing them in the middle of a society that they could not cope with because they lacked industrial skills. However, their identity was not shattered immediately because of the pride they took as Catholics, without realizing that to be an Irish immigrant is not all about expressing a religious statement. The stubbornness and will to survive shaped both English and Irish identities and the experience generated even by these uneducated and ill people imposed new values in the British history. Nevertheless, their desire to permanently reinforce their beliefs and also to create the necessary institutions devoted to its practice helped them surpass their minimal organizational status and rise in time to that of the more evolved Scottish society. The Protestant Irish belonging to the second wave provided a change for the Scottish society and Irish

Research proposal is feasible to delivering package with drone in the

Is feasible to delivering package with drone in the nearest future - Research Proposal Example from this drones to cruise missiles that are also remotely controlled is the fact that drones can be reused and can lift payloads that are either lethal or not. Their importance is in the miniaturization of the cost of producing a full-scale aircraft. the inability to cost the pilots life in case of an accident and host of electronic masquerades that make them invincible in war zones. In an attempt to make automatic the systems that handle letters and parcels, various computerised technology have been applied. These are mainly used in the sorting of the bulky letters and parcels. In the delivery, manual transportation is used that involves human labour. In the delivery system, the automation of the process through the use of drones is a potential area of infusion of technology. In encouraging the acceptance of technology, the automation of services through drones could reduce the workforce or ensure the high level of efficiency that can result in the reduction of time. While using drones in the delivery mechanism, the reduction of the number of the mailmen, and the resultant cost is supposed to increase organizational profits, hours of work and accuracy of the delivery process. This aspect is what inspires the extensive research into the delivery process that uses the unmanned aerial vehicles that are in most cases referred to as drones. Despite being a potential area of improvement of service and the use of technology, the drones raises some economic, legal and safety concerns. The questions that will be handled, in their use, in the delivery system are: The method will involve a secondary research technique. The resources that will be used to conduct the research include books, journal, research articles and papers and information available on the internet portal. The audience of this research are companies that operate parcel delivery services and the other stakeholders like the federal aviation authority. The information that it will provide is crucial to

The Requirements of Quartz Sand Making Machine Essay Example for Free

The Requirements of Quartz Sand Making Machine Essay Quartz crusher is crushing machine used for quartz sand, glass production line. SBM provides quartz crushers, gravel crushers for quartz crushing, grinding. The quartzite principal constituent may be the quartz, such as ceramics, cement, glass, the optical fiber and so forth. A very large amount associated with quartz, which prompted the establishment of a lot of quartz quarry. Quartz sand is the important artificial sand used in construction building. In quartzite quarry, we can use quartz crushing plant for crushing quartz stone, The most typical quartz quarry is processes the actual quartz into quartz sand, quartz sand quality directly affect the earnings of quartz quarry, so the quartz sand making machine requirements are extremely high, usually quartz crusher manufacturing quality low, this quartz fine sand price is low, but affects the quartz sand quality the main cause is the quartz fine sand production line’s craft, our company was engaged within the quartz sand production line design already to possess more than 30 years, experienced the rich experience, the common granularity unqualified phenomenon proposed because of the quartz sand production process within the close up stone sand manufacturing line, this kind of production collection use sand making machine and also the vibrating screen formed a shut path, might the effective answer stone sand quality question. The first step of processing begins after the extraction from quarry or pit. Many of these steps also are common to recycled materials, clay, and other manufactured aggregates. The first stage in most operations is the reduction and sizing by crushing. Some operations, however, provide a step prior to crushing called scalping. Scalping most often is used to divert fines at a jaw primary crusher in order to improve crusher efficiency. In this way the very coarse portion is crushed and then recombined with the portion of crusher-run material before further processing. This first step may, however, be an excellent time to improve a deleterious problem. If a deleterious or fines problem exists in the finer fraction of crusher-run material (namely, clay, shale, finely weathered material, etc. ) the fall-through of the scalping operation may be totally or partially diverted and wasted, or may be made into a product of lesser quality. In any case, only acceptable amounts, if any, should be returned back into the higher quality product. Consideration of process variables in this early stage may be very important.

The Material And Process Requirements For Driving Shaft Engineering Essay

The Material And Process Requirements For Driving Shaft Engineering Essay Based on my research, a drive shaft, driving shaft or propeller shaft is a mechanical component for transmitting torque and rotation that usually used to connect other components of a drive train that cannot be connected directly because of distance or the need to allow for relative movement between them. Besides that, drive shafts carrying an important role as carrier of torque in driveline application. They are subject to torsion and shear stress, equivalent to the difference between the input torque and the load. Therefore, they must be strong enough to bear the stress, whilst avoiding too much additional weight as that would in turn increase their inertia. Drive shafts frequently incorporate one or more universal joints or jaw couplings, and sometimes a splinted join or prismatic join to allow for variations in the alignment and distance between the driving and driven components Based on the functions that has been discussed in previous, I know that the material of drive shaft must be strong enough to bear the stress, light weight which able to reduce the overall automobile weight and thus, increase their inertia at the same time. For the mechanical properties that required for drive shaft including the ability to minimize the losses in transmission, high tensile strength material, high torsional strength and light weight. Therefore, I would like to suggest that polymer matrix composite is more suitable as a chosen material that can be apply in driveline application. 1.1 Design Factors In the progress of my research in driveline application, I found out that marketing considerations are paramount in the motor car industry. There are two factors make this particular application attractive to the industry. On the one hand, vehicles are solid in the market place on claims of increased comfort, luxury and smoothness of operation. On the other hand, the manufacturer is also seeking to provide the maximum performance with the minimum fuel usage at the same time. Thus, usually these two requirements are conflicting. For example, a decrease in body panel thickness reduces mass and so increases performance and fuel efficiency, but this change also increases internal noise. Therefore, some automobile industry has spend much modal in doing research and recently, they have an idea which using carbon fiber (polymer matrix composite) in drive shafts which able to contributes to achieving both aims simultaneously. The factors to be optimized in a shaft after meeting the basic operating requirements just outlined is mass, smoothness of ride and cost. This is because reducing mass is important: To improve performance of vehicle and reduce fuel consumption. To reduce un-sprung mass and so improve vehicle handling and ride. To reduce the residual out of balance forces from rotating parts and so further improve smoothness in use. 2.0 Material Selection Based on the research of different type of material of drive shaft or propeller shaft in driveline application, I have chosen polymer matrix composite as the material selection in driveline application. 2.1 Introduction to Polymer Matrix Composite Polymer Matrix Composite is the material consisting of polymer matrix combined with a fibrous reinforcing dispersed phase. Polymer matrix composites are very popular due to their low cost and simple fabrication methods. Use of non-reinforced polymers as structure materials is limited by low level of their mechanical properties such as tensile strength of one of the strongest polymers (epoxy resin) is 20000 psi (140 Mpa). In addition to relatively low strength, polymer materials posses low impact resistance as well. Besides that, the reinforcement tends to be stiffer and stronger than the matrix providing stiffness and strength. Reinforcement is laid in a particular direction, within the matrix, so that the resulting material will have different properties in different directions. As example, composites have anisotropic properties. This characteristic is exploited to optimize the design and provide high mechanical performance where it is needed. 2.2 Design of a Composites Shaft According to A.W. Thompson from Bristol Composite Materials Engineering Ltd, He has mentioned the two typical shafts side by side, one made in steel and the other in composites as shown in Figure 1. Figure 1 Composite Drive Shaft (Upper) with Steel Shaft The illustration shows the simplicity of the design made possible by carbon fiber. The combination of high stiffness and low density in the composite enables a longer shaft to be made without reaching a critical whirling speed. The whirling speed of a rotating shaft is the speed at which it becomes unstable and defluxions occurs normal to the axis of rotation. The advantage in whirling speed is such as to enable most two piece steel shaft to be replaced with a single composite part. Besides that, weight and cost are reduced by dispensing with the central universal joint and the associated bearing. Moreover, N.V.H (Noise, Vibration and Harshness) factors are improved by the consequent isolation of the passenger compartment from drive line vibration following deletion of the centre bearing from underneath the drivers seat. Further reductions in N.V.H are possible by modification to the orientations of the fibres in the properller shaft tube, which effect longitudinal and radial stiffness. 2.3 Reason Selecting Polymer Matrix Composite as Material in Driveline Application The basic attraction of polymer matrix composite materials for driveshaft application is that they make it possible to increase the shaft length, which is otherwise constrained by bending resonance. For many vehicles, a one piece composite shaft may replace a two piece steel shaft which simplifies both the shaft and installation in the vehicle. Besides that, by using fibre reinforced composites, it is possible to arrange the fibre orientations in the tube so that the bending modulus has a high value (above 100Gpa) whilst the specific gravity is low (below 1.6). This leads to a favourable specific bending modulus and an enhanced critical speed as well. Figure 2 Critical Speeds for Automotive Propshaft According to A.W. Thompson from Bristol Composite Materials Engineering Ltd, the relationship between shaft length and critical speed for tubes suitable for automotive propshaft is illustrated in Figure 2. The graph shows that, for a particular application where a critical speed of 8000 rev/min is acceptable, the longest shaft possible out of steel is 1250 mm whereas a composite shaft of 1650 mm could be achieved. Thus, the maximum length for either shaft is reduced depending on the compliance of the end connections. For acceptable NVH (Noise, Vibration and Harshness), there must also be an adequate margin between vibration drivers and bending resonance of the shaft. Nevertheless, it is generally true that a composite shaft can be made longer than a steel shaft and that for automotive platforms where a two-piece steel shaft with centre support bearing is specified a one-piece composite shaft may be acceptable. This fundamental material property advantage is a powerful technical driver for composite shafts, and substantial weight savings can be achieved. One-piece shafts also simplify the design and engineering of the vehicle floor pan. Therefore, based on explanation above, it is obviously that I have chosen carbon fiber composite (one type of the polymer matrix composite) as the material for drive shaft and further material properties will be discuss in detail later as well. 2.3.1 Material Property of Carbon Fiber Composite (Polymer Matrix Composite) According to Core Composites, Division of ROM Development Corporations research, the material properties of Carbon Fiber Composite are as below: Features Benefits Extremely High Stiffness With a variety of modulus available from standard 33 msi to ultra high modulus pitch over 125 msi carbon fiber has the highest specific modulus of all the commercial reinforcing fibers. High Tensile Strength The strongest of all commercial reinforcing fibers in tension. Especially good for the tension skin on composite laminates. Excellent Corrosion Resistance Used in reinforcing concrete, carbon has good alkaline resistance as well as resistance to salt water and many other chemical environments. Excellent Fatigue Properties Used as a primary reinforcement for fatigue prone products such as helicopter and wind turbine blades as well as offshore power and driveline application. Excellent Compression Properties Proper fiber sizing for the resin matrix selected can yield impressive compressive properties but this quality can be quite difficult to measure with standard ASTM test methods and careful test specimen preparation is critical to achieve accurate result. Low Coefficient of Linear Expansion Carbon is a good tooling reinforcement for molds that will see temperature and where parts need tight dimensional stability. 2.3.2 Composite Shaft Performance According to the research that done by Tetsuyuki Kyono, Composites Development Center, Toray Composites (America), Inc. about the carbon fiber composites applications for auto industries, they have mentioned about carbon fiber composite drive shaft having crush worthiness. Crash load generated during head collision can be absorbed by newly developed joining technology with no adhesive between carbon fiber composite tube and steel adapter. This technology can add safety value to passenger cars in addition such as weight and noise reductions. Therefore, the performance data of the composite shaft should be take consideration as one of the main section in choosing the best material to apply in driveline application. Thus, they have evaluated torque carrying capability as index of shaft performance. One of typical data has been shown in Figure 3. It is noted composite drive shaft performed as expected up to 150à ¢- ¦C at static torsional test and showed much better fatigue resistance than steel system shown as target. Figure 3 Torsional Strength of Drive Shaft for 2000 Nm Class In Figure 4, residual torque carrying capabilities after exposure to various environments are shown in percentage compare with control data. As shown below has shown the reduction in performance of composite drive shaft is very minimal. Figure 4 Residual Torsional Strength (%) after Environmental Testing 2.3.3 Proving Test After the obvious laboratory tests above to show static strength and stiffness, fatigues tests are important as well. Carbon fibre has an excellent performance in fatigue and glass fibre is as good as most metals. A composite shaft has withstood 106 cycles of maximum torque as compared with the 104 cycles typically required of a steel shaft. Shafts were fitted to cars to gain road experience and demonstrate satisfactory operations. Such testing demonstrates that the component really works and meets all the criteria required. In this application, for instance, road use showed that: Temperature resistance to underbody environment was satisfactory Corrosion resistance (example: to salt spray was not a problem) Creep loading resistance was adequate Resistance to flying stone damage was not a problem End attachment strength was adequate Shock load capability was adequate Based on the proving test that has been done by A.W.Thompson, we knew that polymer matrix composites is suitable to be taken as material in driveline application such as making drive shaft or propeller shaft as well due to its attractive material properties and more affordable cost as well if compare with others material such as steel. 2.3.4 Crash Performance of Composite Propshafts According to Dr Andrew Pollard, GKN Technology, Wolverhampton, UK, he stat that increasing public interest in safe vehicles is encouraging car manufacturers and their suppliers to design components and systems that will perform well in a crash (2). The propeller shaft in rear- and fourwheel- drive cars is good example of this. Figure 5 Behaviour of Propeller Shafts in Frontal Crash In a frontal crash, the propeller shaft transmits forces from the engine/gearbox unit to the rear axle. Many vehicles today have a two-piece propeller shaft that can buckle at the centre bearing in any direction, depending on the joint position at impact. It is therefore virtually impossible to predict the axial force and the energy absorbed by the shaft in a crash. This is illustrated in Figure 5, contrasted with the behavior of a propeller shaft with a defined axial collapse mode. The target for crash-optimized propeller shafts is to achieve a defined behavior of axial force and displacement during an impact and consequently controlled energy absorption as shown in Figure 5. 3.0 Manufacturing Process of Carbon Fiber The process for making carbon fibers is part chemical and part mechanical. The precursor is drawn into long strands or fibers and then heated to a very high temperature with-out allowing it to come in contact with oxygen. Without oxygen, the fiber cannot burn. Instead, the high temperature causes the atoms in the fiber to vibrate violently until most of the non-carbon atoms are expelled. This process is called carbonization and leaves a fiber composed of long, and tightly. The fibers are coated to protect them from damage during winding or weaving. The coated fibers are wound onto cylinders called bobbins. The fibers are coated to protect them from damage during winding or weaving. The coated fibers are wound onto cylinders called bobbins. Moreover, the inter-locked chains of carbon atoms with only a few non-carbon atoms remaining. Here is a typical sequence of operations used to form carbon fibers from polyacrylonitrile. 3.1 Spinning First: Acrylonitrile plastic powder is mixed with another plastic, like methyl acrylate or methyl methacrylate, and is reacted with a catalyst in a conventional suspension or solution polymerization process to form a polyacrylonitrile plastic. Second: The plastic is then spun into fibers using one of several different methods. In some methods, the plastic is mixed with certain chemicals and pumped through tiny jets into a chemical bath or quench chamber where the plastic coagulates and solidifies into fibers. This is similar to the process used to form polyacrylic textile fibers. In other methods, the plastic mixture is heated and pumped through tiny jets into a chamber where the solvents evaporate, leaving a solid fiber. The spinning step is important because the internal atomic structure of the fiber is formed during this process. Third: The fibers are then washed and stretched to the desired fiber diameter. The stretching helps align the molecules within the fiber and provide the basis for the formation of the tightly bonded carbon crystals after carbonization. 3.2 Stabilizing Forth: Before the fibers are carbonized, they need to be chemically altered to convert their linear atomic bonding to a more thermally stable ladder bonding. This is accomplished by heating the fibers in air to about 390-590 ° F (200-300 ° C) for 30-120 minutes. This causes the fibers to pick up oxygen molecules from the air and rearrange their atomic bonding pattern. The stabilizing chemical reactions are complex and involve several steps, some of which occur simultaneously. They also generate their own heat, which must be controlled to avoid overheating the fibers. Commercially, the stabilization process uses a variety of equipment and techniques. In some processes, the fibers are drawn through a series of heated chambers. In others, the fibers pass over hot rollers and through beds of loose materials held in suspension by a flow of hot air. Some processes use heated air mixed with certain gases that chemically accelerate the stabilization. 3.3 Carbonizing Fifth: Once the fibers are stabilized, they are heated to a temperature of about 1,830-5,500 ° F (1,000-3,000 ° C) for several minutes in a furnace filled with a gas mixture that does not contain oxygen. The lack of oxygen prevents the fibers from burning in the very high temperatures. The gas pressure inside the furnace is kept higher than the outside air pressure and the points where the fibers enter and exit the furnace are sealed to keep oxygen from entering. As the fibers are heated, they begin to lose their non-carbon atoms, plus a few carbon atoms, in the form of various gases including water vapor, ammonia, carbon monoxide, carbon dioxide, hydrogen, nitrogen, and others. As the non-carbon atoms are expelled, the remaining carbon atoms form tightly bonded carbon crystals that are aligned more or less parallel to the long axis of the fiber. In some processes, two furnaces operating at two different temperatures are used to better control the rate de heating during carboniza tion. 3.4 Treating the Surface Sixth: After carbonizing, the fibers have a surface that does not bond well with the epoxies and other materials used in composite materials. To give the fibers better bonding properties, their surface is slightly oxidized. The addition of oxygen atoms to the surface provides better chemical bonding properties and also etches and roughens the surface for better mechanical bonding properties. Oxidation can be achieved by immersing the fibers in various gases such as air, carbon dioxide, or ozone; or in various liquids such as sodium hypochlorite or nitric acid. The fibers can also be coated electrolytically by making the fibers the positive terminal in a bath filled with various electrically conductive materials. The surface treatment process must be carefully controlled to avoid forming tiny surface defects, such as pits, which could cause fiber failure. 3.5 Sizing Seventh: After the surface treatment, the fibers are coated to protect them from damage during winding or weaving. This process is called sizing. Coating materials are chosen to be compatible with the adhesive used to form composite materials. Typical coating materials include epoxy, polyester, nylon, urethane, and others. Eight: The coated fibers are wound onto cylinders called bobbins. The bobbins are loaded into a spinning machine and the fibers are twisted into yarns of various sizes. 3.6 Quality Control The very small size of carbon fibers does not allow visual inspection as a quality control method. Instead, producing consistent precursor fibers and closely controlling the manufacturing process used to turn them into carbon fibers controls the quality. Process variables such as time, temperature, gas flow, and chemical composition are closely monitored during each stage of the production. The carbon fibers, as well as the finished composite materials, are also subject to rigorous testing. Common fiber tests include density, strength, amount of sizing, and others. In 1990, the Suppliers of Advanced Composite Materials Association established standards for carbon fiber testing methods, which are now used throughout the industry. 3.7 Health and Safety Concerns There are three areas of concern in the production and handling of carbon fibers: dust inhalation, skin irritation, and the effect of fibers on electrical equipment. During processing, pieces of carbon fibers can break off and circulate in the air in the form of a fine dust. Industrial health studies have shown that, unlike some asbestos fibers, carbon fibers are too large to be a health hazard when inhaled. They can be an irritant, however, and people working in the area should wear protective masks. The carbon fibers can also cause skin irritation, especially on the back of hands and wrists. Protective clothing or the use of barrier skin creams is recommended for people in an area where carbon fiber dust is present. The sizing materials used to coat the fibers often contain chemicals that can cause severe skin reactions, which also requires protection. In addition to being strong, carbon fibers are also good conductors of electricity. As a result, carbon fiber dust can cause arcing and shorts in electrical equipment. If electrical equipment cannot be relocated from the area where carbon dust is present, the equipment is sealed in a cabinet or other enclosure. 4.0 Fabrication Process of Driveshaft by using Polymer Matrix Composite According to the project research that done by Alex Santiago from Texas AM University Kingsville, he has discussed the fabrication process of drive shaft by using polymer matrix composite which is carbon fiber as main material. As reference, the fabrication process by Alex has been taken for me to understand the hand make drive shaft by using carbon fiber in real life. Thus, the following fabrication process is belonging to Alex from Texas University which is worth to be taken as references in this topic discussion. There are several things to consider when picking a fabrication method. Time is a major consideration. There is little time for fabrication, so the fabrication process has to be quick. The fiber has to be laid at specific angles to give the shaft certain characteristics. The weave patterns have to be tight and compact. Resin has to be applied evenly. The shaft has to be wound in a way such that the yokes can be easily attached. The easiest fabrication method for creating a hollow tube is filament winding. Filament winding is an automated process in which a filamentary yarn in the form of tow is wetted by resin and uniformly and regularly wound about a rotating mandrel. The filament winder can be programmed to create specific and tightly wound patterns. To create a composite part on the winder, a winding pattern is needed, along with a mandrel, mold release, fiber, resin and hardener, a way to apply even pressure to the part and a curing procedure. The wind patterns were determined by using Laminate Design software created by Dr. Larry Peel. After entering mechanical properties for the resin and tow, different wind angles and layers were tried in the Laminate Design software until the driveshaft had the desired characteristics. Table 1 gives the wind angle and its purpose. The tow, resin and hardener, and adhesive are the most critical elements of the shaft. Each structural component must be carefully selected so that the shaft has good mechanical properties. The tow which was used in the Laminate Design Software calculations was chosen because it is strong, light weight, and aerospace quality carbon fiber. Fiber used by the aerospace, although expensive, is rigorously quality controlled. It was decided that this fiber would be uniform, therefore giving the driveshaft uniform properties. The resin and hardener were chosen for several reasons. First, the resin is tough. The resin also has a high viscosity. High viscosity is desired because, with the wet winding process, is easier to control the amount of resin being applied to the tow. Wet winding will be discussed further in the process section. Another reason for choosing this resin is its elongation at break. At 6% elongation at break, it is known that the resin will not be too brittle and that the wound shaft will have some flex for absorbing the shock between shifting gears. Finally this resin was chosen because of its high pot life. After mixing the resin and hardener, there is a little over two hours before it begins to gel. This is enough time to wind the entire shaft before the resin sets up. The adhesive was chosen for a few reasons. Foremost, the adhesive also met the criteria for high tensile lap shear strength at room and elevated temperatures. At room temperature the adhesive has lap shear strength of 4,200 psi. At 250 F the lap shear strength is 2,300 psi. Also, the adhesive is aerospace grade, ensuring high quality. Table 1 Wind Angles 4.1 Mandrels In order to produce the mandrel of a driveshaft, several derivations should have gone through. Mandrels made of cardboard tubing and solid shafts were considered. These ideas were never fabricated because it would be hard to remove the mandrel from the wound tube. The resin would cause the cardboard mandrel to stick to the shaft making it impossible to remove. A solid shaft of steel or aluminum would be heavy, and expensive to create. 4.1.1 Mandrel 1 Firstly, it was decided to create a mandrel made of steel muffler tubing which was split with a plasma cutter into four parts along its length. The idea was to wind the shaft, let it cure, then dismantle the mandrel and remove the tube. Next, two pieces machined out of steel were created and attached to the muffler tubing which allows the mandrel to be spun in the filament winder. One end is chucked into the winder the other end has a live center which spins on a center point. This mandrel did not work because the mandrel pieces could not be bolted to the machined ends in a way that they were square. This was due to the fact that the muffler tubing is cold rolled which means it is pre-stressed. Once the tubing was split into four pieces, each piece bowed. 4.1.2 Mandrel 2 A second mandrel was created using muffler tubing which was split into two pieces. This mandrel was square when bolted into place. To keep the tension of the fiber from pulling the gap in the mandrel closed, three round, wooden pucks were evenly spaced through the center of the mandrel. The second mandrel was used to create a practice drive shaft. The pucks were evenly spaced through the center of the mandrel. Shrink wrap tape, which shrinks and applies pressure when heated, is wrapped around the mandrel over the areas where the pucks are. The tape applies pressure and keeps the pucks in an upright position as shown in Figure 6. Once the pucks were set in place, a few dry runs were made with no resin. One pass of each fiber angle was wound. Figure 6: Wooden Puck in Mandrel Once the winding began, it became obvious that there was not enough turn around room. When winding a composite part, there are four defined areas on the part. The entire part consists of the head, the turn around, the useable shaft, and the tail. The winding layout is shown in Figure 6. The wind angle is the angle the fiber makes with the center line of the mandrel. The 45 degree and 15 degree wind angles did not have enough friction to stick to the mandrel in the turnaround areas. The fiber began to slip and bunch up, causing misalignment in the pattern. Figure 6: Winding Layout This created a new problem. To keep the fiber from slipping, the turnaround area needed to be lengthened. The mandrel at its current length just fits in the curing oven, making it impossible to lengthen the mandrel. To alleviate this problem, two pieces of pipe, about one foot long each, were threaded into the ends of the machined pieces as shown in Figure 7. Adding the extensions made more turn around area. These threaded pieces can be removed once the shaft is wound and the resin sets up. When the extensions are removed the mandrel can easily be placed in the oven to finish curing. Figure 7 Mandrel Extensions The wind patterns were tested again with the extended turn around room. The extensions and the change in diameter kept the fiber from slipping, and allowed for full uniform coverage by the fiber. The test patterns were removed, and resin and hardener were mixed and poured into the resin bath to start a practice shaft. The resin bath applies resin to the fiber before it is wound about the mandrel. The resin bath can be seen in Figure 8. A practice shaft was wound using the setup shown in Table 2. A practice shaft was wound for a few reasons. The practice shaft allowed testing of the wind patterns with the resin and the fiber together. Curing temperature and time could be observed. Dismantling the shaft can be attempted, and the shaft can be inspected for proper resin wet out, roundness, and overall strength. Table 2 Practice Shaft Wind Pattern Setup Figure 8 Resin Bath This was a very difficult process. First, the material that wrapped over the end caps had to be cut back in order to expose the bolts holding it to the mandrel. Once this was accomplished we began removing the bolts. Resin had seeped into the threads of some of the bolts causing them to stick. The head of one bolt was twisted off trying to get it out. This bolt was machined out. Once the caps were removed the shaft did not collapse as expected. The gap were the mandrel had been split had filled in with resin. A tubing cutter was used to cut the shaft into sections and then it was split in half with a band saw. A 2 foot piece was spared and slid off the shaft. The ridge left inside the shaft was 0.125 inches deep. This created a stress riser that severely reduced the integrity of the shaft. It was obvious that this mandrel was not going to work. 4.1.3 Mandrels 3 Improving upon the mistakes on the previous mandrels, a new, one piece, mandrel was made from aluminum tubing. The tubing maintained a 2.75 inch OD and was readily available. A 16 gauge 2.75 OD tube was purchased. The tubing is normally made for turbo charger inlet ducting. A test piece was cut from the tube to be used for testing. The test piece was wet sanded with 2000 grit sandpaper. A silicone mold release compound was applied to the test shaft. 90 ° test patterns were wound onto the piece and cured at 250 °F for 15 hours. We used a higher curing temperature in order to expand the aluminum mandrel while compacting the fiber. After curing was complete, we then placed the test mandrel in the deep freeze that was Ãâ€" ¾20 °F in order to shrink the aluminum tube. The test mandrel was removed from the freezer. The tube was impacted onto a block of wood while holding the fiber. The mandrel came out with no difficulty. This test was successful. The third mandrel was fitted to the end caps. The end caps were then bolted to the mandrel. Figure 9 shows the final mandrel. Figure 9 Final Mandrel of Driveshaft 5.0 Conclusion As conclusion, the potential for carbon fibre composites (one type of polymer matrix composite) in automotive drive shafts as a means of achieving substantial weight reduction has long been recognized and has been demonstrated in small volume since 1988. Finally, I think that polymer matrix composites is the most suitable materials which can applied in driveline application and engineers should find cost effective applications on it to bring this applications to fruitful use in future.

The Civilized and Self-Cultured Black Man Essay -- Narrative Life Fred

The Civilized and Self-Cultured Black Man In Narrative of the Life of Frederick Douglass, An American Slave, Written by Himself, Frederick Douglass faces the problem of detailing his transformation from slave to man in a manner which is acceptable to both his audience and his own authorial purpose. Douglass must walk the thin line between being powerful and being threatening to his white audience. He attempts to avoid becoming a threat by appropriating the image of a self-made man, as defined in William E. Channing's essay entitled "Self-Culture." Douglass constructs his manhood in terms of civilization, a tactic later employed by Ida B. Wells in her anti-lynching campaign. Although physical strength and the escape from civilization into the wilderness was an equally popular construction of manhood at the time, Douglass follows Channing's belief that true manhood is achieved through knowledge, the mastery of letters and cultivation of manners. This conception of masculinity centers around moral uprightness and self-control a s a means of suppressing passions and desires, the latter being something that most of Douglass' masters lacked. If civilization indicates manhood, then the brutal masters described in Narrative are not men at all. This reversal makes Douglass, the slave turned self-cultured man, a representation of true manhood. According to Channing, every man has the potential to be a great man. Through self-culture, and the resulting moral and intellectual growth, men can expand and live up their potentials, becoming ideal men. Channing understands moral sense as the suppression of passions and desires that are inherent in human nature, but are not good for soul. When a man looks into himself, he discovers...d... ... image of this civilized man is reinforced by Douglass' narrative voice which takes on the Harvard style tone, that sounds much like Channing's voice in "Self-Culture." This tactic may have been to support his use of Channing's ideas, but it also gave Douglass the unique position of speaking in the same style as his audience. This would perhaps be unexpected by his white Northern audience, but nevertheless reinforces Douglass' civility. By taking popular conceptions of civilization, self-control and literacy, and applying them to himself, Douglass invents in himself the representation of true manhood. Works Cited: Channing, William E. The Works of William E. Channing. Boston: American Unitarian Association, 1875. Douglass, Frederick. Narrative of the Life of Frederick Douglass, An American Slave, Written By Himself. New York: Penguin Books USA Inc., 1968.

Oscar Wilde and His Fairy Tales Essay -- Oscar Wilde Fairy Tales Liter

Oscar Wilde and His Fairy Tales I. Introduction Wilde, Oscar (Fingal O’Flahertie Wills) (b. Oct. 16, 1854, Dublin, Ire ?d. Nov. 30, 1900, Paris, Fr.) Irish wit, poet and dramatist whose reputation rests on his comic masterpieces Lady Windermere’s Fan (1893) and The Importance of Being Earnest (1899). He was a spokesman for Aestheticism, the late19th-century movement in England that advocated art for art’s sake. However, Oscar Wilde’s takeoff of his enterprise and, his shaping of his characteristic style of works could be both considered originating from his fairy tales. It was not until his first collection of fairy tales had come out that he was regarded as an influential author. The British magazine Elegance, in which his The Selfish Giant is said to be adequately regarded as â€Å"the perfect works?and, his complete collection of fairy tales are even said to be the quintessence of the pure English language, equates him with the famous Danish writer of fairy tales Hans Christian Anderson. In order to explore and study the fact why Oscar Wilde’s takeoff of his enterprise and, his shaping of his characteristic style of works could be both considered originating from his fairy tales, and the social, religious and aesthetic aspects of Oscar Wilde’s fairy tales, in this essay, I try to analyze from the angles of sociology and religion three of Oscar Wilde’s fairy tales, namely The Happy Prince, The Selfish Giant and The Young King, which personally I regard as the most typical characteristic style of Oscar Wilde’s works. In this essay, the first chapter gives a brief introduction and background of Oscar Wilde and his fairy tales; the second chapter summarizes the three fairy tales which I have chosen to study, namely The Happy Prince, The Selfish Giant and The Young King; the third chapter expounds from the angles of sociology and religion my personal in-depth study and analysis of the three fairy tales of Oscar Wilde; the last chapter gives a personal brief conclusion of the value of Oscar Wilde’s fairy tales. II. A Brief Introduction and Background of Oscar Wilde and His Fairy tales Once upon a time there was a boy named Oscar Wilde. Oscar lived on a far way land called Ireland with his mother and father. His parents loved him very much. They would often tell him folklore of their native land that greatly interested Oscar. One day, Oscar ... ...other aspects of society. However, through the use of rhetorical strategies such as manipulation of genre and persona, tone, and allusion he creates a means of expression that goes beyond overt social commentary to speak these beliefs to many, including those who may otherwise disagree with him. By making his views and creating stories immersed in fairy tales and Christianity, Wilde reveals his hope for the future of society and, more importantly, humankind. VI. Bibliography Drabble, Margaret. The Oxford Companion to English Literature. Britain: Oxford University Press, 1985. Holy Bible. China: China Christian Council, 2001. Oscar Wilde Homepage . (10 Mar, 2004?6 May, 2004) Snider, Clifton. â€Å"On the Loom of Sorrow.?Eros and Logos in Oscar Wilde’s Fairy Tales. . (30 Apr. 2004) The editorial departments of Merriam-Webster and Encyclopedia Britannica. Merriam Webster’s Encyclopedia of Literature. Massachusetts: Merriam-Webster, Incorporated, Publishers Springfield, 1995. Wilde, Oscar. The Complete Works of Oscar Wilde. the U.S.: Harper Perennial, 1989. Wilde, Oscar and Jack Zipes. Complete Fairy Tales of Oscar Wilde. the U.S.: New American Library, 1996.

Forgetting Sarah Marshall Essay

The movie â€Å"Forgetting Sarah Marshall† is a successful example of comedy. It was theoretical released on April 18, 2008. The film was brought together by a group of well acted performers and was very famous for perfectly combining the hilarious performances and the laughter together. I think that a successful comedy movie has to have these important factors. First, it needs to be performed with the perfect sounds elements such as the background music and the songs in the movie; second, the movie should be brought by some famous figures and directors, which were well-known in the comedy industry to make sure it will have a great hit this time; third, there should be a lot of stupid scenes with nonsense in the movie that will make people laugh their heads off. The movie â€Å"Forgetting Sarah Marshall† won the Golden Trailer Award for Wild Posts in the year 2008 and was nominated for 6 different awards such as the Golden Trailer Award Best Comedy, and Teen Choice Comedy Awards. The film is directed by the famous Nicholas Stoller and was written by Jason Segal. The movie was a successful hit and was well know among the teen’s group as well as the adults group. The main character of the movie; Peter, he had the most perfect life that all man wished for; which is dating the most famous and the sexiest TV star of the show Crime Scene, Scene of the Crime. But an awful break up which was brought up by now his ex-girl friend, TV star Sarah Marshall; Peter felt like he needs to get away from his life and forget everything about Sarah, so he decided to go to Hawaii for a vacation. The problem is Peter’s ex-girl friend is also on a trip to Hawaii with his new boyfriend; Snow. Peter had to learn to forget the past, stop being a baby, and finally become a man. In the movie, Peter is a sound effect editor for his ex-girlfriend’s TV show; Crime Scene, Scene of the Crime, he was suppose to do dark and ominous music for the background, after he broke up with Sarah, he was playing lively music for the show, which was a perfect part with sarcastic and dark humor in it. The movie cleverly blends together his act with his music talents. Such as the Dracula puppet song that he sang in front of a crowd of strangers that has no idea what he is doing, as soon as he is finished with the Dracula song; the awkward situation that everyone was in total silence was amusing and made the audience want to laugh without a reason. When Sarah Marshall’s new boy friend went on stage and sang her the song â€Å"Inside You†, with the ridicules body movements that he did with the song, the audiences are usually stunned at first, but as we watch it further, it definitely leads to full of laughter. A powerful comedy should be brought together by a group of well known figures in the comedy industry. â€Å"Forgetting Sarah Marshall† is a perfect example of a good comedy because it was produced by four producers, which they were all very famous for being in the comedy business for so long. The exclusive producer Richard Vane was also the producer of Last Holiday (2004), Rodney Rothman who was also the producer for Help Me Help You (2006), and Judd Apatow who was the actor in Pineapple Express (2008). Most importantly, Producer Shauna Robertson. She was the producer for many previous comedy great hits; such as the Pineapple Express (2008), Knocked Up (2007), The 40-Year-Old Virgin (2005) and Meet the Parents (2000). Jason Segal which was the writer of the film was also the leading actor of the movie. Actress Kristen Bell from the famous TV show Gossip Girl also took part in the movie, as well as Mila Kunis who was the sound for Meg Griffin for Family Guy and Bill Hader from Knocked up. With this impressive group of producers and performers, people will surge into the movie theater as soon as the film is released in the theaters. The most important element for a comedy is it has to have some scene that came out of nowhere and was totally stupid with nonsense. It is very important for a comedy, because people usually watch comedies when they don’t want to think about things and just want to enjoy the movie; otherwise there is no point of watching it. â€Å"Forgetting Sarah Marshall† is a perfect example because it is filled with nonsense. After breaking up with Sarah, Peter Felt like that he needs to have sex with different women just because his ex-girlfriend is having sex with another guy. After having a one night stand with a women that he barely even known, Peter cried in front of her and was acting totally out of ordinary. Also when the chief invite him to go and prepare dinner with him, they end up chasing a pig and Peter had to kill the pig with his bare hands. Scene in the movie shows much different nonsense that will usually make people laugh from their heart. The movie was loved widely all over the world, but there are still a lot of people who didn’t like the movie â€Å"Forgetting Sarah Marshall†. A lot of professionals’ movie critics didn’t like the movie because they think that the contents are â€Å"totally forgettable† or they think that â€Å"it is hard to like a character in the movie, when his own movie makes fun of himself. † I disagree with these critics, because there are many scenes in movie that people will not forget after that watched it, and a comedy are usually funny because the main characters were made fun of, either by himself or the other characters in the movie. That is what usually makes a movie a great hit of comedies. Just like what I previously mentioned, â€Å"forgetting Sarah Marshall† includes the perfect factors of sound element, was performed and brought together by a power group of people in the comedy industries, it also includes many stupid senses that people will not forget and will be talking about it among everyone who have watched the movie. This film is a great example of a comedy, and it is only for you to watch it and find out for yourself.