Oct 05, · The report will also examine the reputation of the bank through the explanation portrayed by the customer representatives as it is received, first hand from the clients. The investigative issues portrayed in this report have been facilitated by the use of journals, and the numerous reports given by authors of different newspapers Mar 21, · The Young’s modulus or modulus of elasticity gives the direct relationship that exists between strain and stress for all stresses that is below the limit of proportionality. The stress at that gives a plastic deformation of % is known as the nominal yield strength blogger.com Inc. was founded in in Washington and blogger.com website became first active in July to become the largest online retailer in the world to offer Earth’s Biggest Selection in less than two decades. The e-commerce and cloud computing company earned an operating income of USD billion, USD billion, and USD billion for , , and respectively (Annual
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We dissertation report direct marketing cookies to enhance our website for you. Proceed dissertation report direct marketing you agree to this policy or learn more about it. Type of paper: Report. Topic: StressTeenagersEducationFailureInformationExperimentdissertation report direct marketing, YouthVehicles. Tensile tests are instrumental in understanding the properties of various materials and the dissertation report direct marketing will behave when subjected to a load.
Four different materials were subjected to tensile test using universal testing machine. The materials that were tested were: steel and nylon. The material properties obtained from the various test were compared with the theoretical values and also amongst the materials themselves.
The tensile test results showed that steel was the strongest material. The main objective of the experiment was to test the tensile properties of two different types of materials nylon and steelusing a universal testing machine. Most engineering materials can be defined by their physical properties. These properties include ultimate tensile strength, modulus of resilience, modulus of toughness, yield strength and modulus of elasticity.
Once determined by the means of the experiment, the above properties are then applicable to all cases of that material experiencing similar stress thus allowing for the design of the structural components with predictable behavior. In real life, most of these qualities are affected environmental conditions such as dissertation report direct marketing, loading frequency and the purity of the material, dissertation report direct marketing.
The presence of impurities and flaws affects the various properties of the material either negatively or positively, dissertation report direct marketing. For pure materials that are lacking in one or more of the desirable properties impurities may be added to enhance the desirable properties. On the other hand the presence of flaws in the material has negative effects on the properties of the material which may lead to sudden failure or unpredicted behavior.
To mitigate these negative effects, temperature is sometimes adjusted mathematically dissertation report direct marketing the design of safety is taken into consideration during the design stage to take care for the uncertainties and the unpredictable loading hence ensuring that the material does not fail.
The materials are also tested to ensure that they are mechanically sound. The established material properties are mostly relied upon to determine the type of load and the range within which the materials used are safe. The properties also enable the comparison of strength, toughness, brittleness and other similar features.
When testing a material with an intention of testing its mechanical properties, a stress-strain graph proves to be of help in the analysis and so is the mode of failure investigation.
Every mode of failure is linked to an important material property: sudden fracture to ultimate strength, yielding to yield strength and elastic failure to the elastic limit.
When doing a tensile test by the application of axial load to a test sample, the required data for a stress-strain graph can be obtained and by subjecting a material to tension until it fails by sudden fracture; it is possible to determine the conditions at which yielding and elastic failure occurs. The stress at that gives a plastic deformation of 0. While dissertation report direct marketing amount of stress that can be withstood by a sample under tension before failure is known as ultimate tensile strength.
Percentage elongation at failure basically gives the final change in the length of the sample that has already reached failure. The percentage area reduction gives the smallest possible cross-sectional area of a specimen that has undergone failure. The modulus of toughness gives the amount of work done on a unit volume starting from where stress is zero up to the point of failure, dissertation report direct marketing. The modulus of resilience indicates the ability of the material to absorb energy without undergoing plastic deformation.
Engineering stress is dissertation report direct marketing applied load divided by the area the initial cross sectional area of the material. The true stress is given by the amount of load applied divided by cross sectional area after taking into consideration the change in area due to the deformation. Engineering strain is the change in length divided by initial gauge length.
On the other hand the true strain at the point of rapture is given by the natural log of the final length of the sample divided by initial length. In this case the initial length is obtained after taking into account each instantaneous change in length. Figure 1. Stress vs. Strain showing major mechanical properties The stress-strain graph can be used to determine the major mechanical properties of an engineering material. These properties when fully analyzed describe the mechanical performance of a material that is subjected to a load and equally apply to all kinds of engineering materials.
This is normally determined by measuring the change in length of the material at the end of the test or by expressing OE as shown in figure 1 as a percentage. To ensure that only the tensile load applied to the specimen was measured the load cell was zeroed. The specimen was detached from the jaws of the machine and the system was reset for another tensile test, dissertation report direct marketing. The steps above were repeated for the other specimen. Figure 2. Tensile testing machine used in the experiment Figure 3.
A test specimen ready for tensile test. The results obtained from the experiment were almost similar with the theoretical values of the specimens used. From the results of ultimate tensile strength as shown in table 1, it is evident that steel was the strongest material as compared to nylon. It can also be seen that all the values had a slight deviation from the theoretical values indicating that the data obtained was consistent and the procedure used proved to be valid and repeatable.
The yield strength in table 1 provides a good indication of the yield stress at the yield point. The yield stress and tensile strength of Steel were much higher than those of nylon which indicated that steel is much stronger and ductile as compared to nylon.
The difference in the mechanical properties of the two materials can be explained by the difference in the atomic structure of the materials. Steel has more desirable properties for the application in the construction industry while nylon as properties that are desirable in the textile industry where strength is not of much importance.
The tensile test of steel and nylon had consistent and accurate results. It was shown that the strength and stiffness properties of steel were much higher than those of nylon. The experimental results for the material properties tested of the two specimens were close to the established values. This shows that the test procedure used was accurate and the material tested were free of major flaws. The slight variations of the results from the established values were properly due to instrumental error and variations of the atomic structure properties of the materials used.
Chalmers, B. The structure and mechanical properties of metals. New York: Wiley. McL Everett, F, dissertation report direct marketing. Mechanical properties of materials [7th ed. Ann Arbor, Mich: [Distributed by Ann Arbor Instrument Works]. Farrar, R. The mechanical properties of materials, dissertation report direct marketing.
London: Methuen Educational. Mechanical properties at high rates of strain: Proceedings of the Conference on Dissertation report direct marketing Properties of Materials at High Rates of Strain held in Oxford, April London: Institute of Physics. Pelleg, J. Mechanical properties of materials. Dordrecht: Springer. ean, D. Mechanical properties of metals. We accept sample papers from students via the submission form.
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LEARN MORE. Abstract Tensile tests are instrumental in understanding the properties of various materials and the way will behave when subjected to a load. Objective The main objective of the experiment was to test the tensile properties of two different types of materials nylon and steelusing a universal testing machine, dissertation report direct marketing.
Theory: Most engineering materials can be defined by their physical properties. Materials and equipment - Tensile specimens nylon and steel - Vernier calipers - Universal testing machine Experimental procedure - The diameter and gauge length of each of the four tensile specimens was measured by the Vernier caliper and recorded in a table to be used for the calculation of engineering strain and engineering stress.
Conclusion The tensile test of steel and nylon had consistent and dissertation report direct marketing results. References Chalmers, B. Tensile Strength.
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Mar 21, · The Young’s modulus or modulus of elasticity gives the direct relationship that exists between strain and stress for all stresses that is below the limit of proportionality. The stress at that gives a plastic deformation of % is known as the nominal yield strength A research report is the final outcome of lengthy research process. Presenting research report: The research report will then be delivering to the marketing decision-maker department. The final decision maker will only be the marketing manager or top level management, they are the one who is going to approve the recommendations. Follow-up steps Aug 10, · Introduction. When choosing a topic for your finance and accounting dissertation, you might not be confident of which area to explore. You might be caught up between various topics, such as investment finance, MNCs’ financial practices, ethics in finance, and more
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