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Designing in engineering Assignment PDF

   

Added on  2021-06-17

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1Tensile Test Lab ReportStudent’s Name:Tutor’s Name: Abstract— designing in engineering is fundamentally on the basis of the properties of the material usedin the designing process and finally the manufacture of components in engineering. One of the paramountproperties of design materials is the strength. This report is a comparison in detail of the properties of twometals. Aluminium and Mild Steel were tested on the Universal Tensile Machine to determine the strengthof each material. An analysis was done from the results obtained. The analysis is then used to predict thefeatures of the different metals when subjected to different loads as in the experiment. The conclusion fromcomparing the two metals is that mild steel has a higher yielding stress and therefore a more strength thanAluminium.Keywords—Yiedling stress, Universal Tensile Machine, loads, StrengthI. INTRODUCTIONApplication of engineering design expands through numerous fields in the real world. Designs from paperand theory are put into real world to solve real world problems. Before any application of engineeringdesign in the various fields for example in the aircraft industry, railways building and transportation,manufacture of plastics and pressure vessels, it is crucial to understand the characteristics of the material tobe used to manufacture some of these infrastructure and or equipment1[ CITATION Pot11 \l 1033 ]. One of theimportant ways to ascertain these properties is through carrying out a tensile test’s tensile test is carried outto determine the yielding stress and time of a material in engineering. The test is done on a universal TensileMachine.The specimen which is an Aluminium and Mild Steel in these case is prepared for the test by marking andcutting out a part on the specimen. It is at this point that the metal will be stretched and the results from how1 J. R. Y. P. H. A. a. N. K. N. Pothnis, ". "High strain rate tensile behavior of aluminum alloy 7075 T651 and IS 2062 mildsteel."," Journal of Engineering Materials and Technology 133, no. 2 (2011): 021026., 2011

2much load it can take in versus the time it takes to do so before it yields by snapping is recorded2[ CITATIONZha12 \l 1033 ]. The Tensile test can also be used to determine other properties of engineering materials forexample the 3percentage elongation, and the ultimate strength. For further analysis of the properties of thematerial the original gauge length and diameter are further used in calculations as will be indicated by thereport. II.METHODSApparatus1.Universal testing machine2.3 Aluminium sample pieces3.3 Mild Steel samples pieces4.Data recording program5.Vernier callipersTest procedure1.The sizes of the specimens including their thickness and width were determined using the Verniercallipers. The gauge length of the specimen was determined.2.The workpieces were cut into a “dog-bone” shape after the gauge length of each specimen wasdetermined [ CITATION Raf11 \l 1033 ].3.The work piece loaded into the universal testing machine after several adjustments had been made tothe machine including zeroing, and adjusting of the machine jaws, attaching of extensometers on themachine’s reduced sections and using the scroll wheel where slippage was a problem.2 Q. K. D. O. V. S. R. a. F. J. Zhang, "Deep eutectic solvents: syntheses, properties and applications., " Chemical Society Reviews41, no. 21 (2012): 7108-7146., 2012.3J. R. Y. P. H. A. a. N. K. N. Pothnis, ". "High strain rate tensile behavior of aluminum alloy 7075 T651 and IS 2062 mild steel.","Journal of Engineering Materials and Technology 133, no. 2 (2011): 021026., 2011.

34.Adjusted the extensometers to zero after removal of the specimen from the machine. Embarked onmeasuring the strain of the specimen.5.To stop the test, separate the tensile grips at an incessant speed. Dictated by the shape of thespecimen. The results are plotted on a spreadsheet by the machine for analysis.6.Concluded the test after the work piece breaks [ CITATION Aha10 \l 1033 ].4III.RESULTSTABLE I. RESULTSFROMTHEEXPERIMENTMild SteelAluminumsTime sExtension mmLoadNStrainmm/mmStressMpaExtension mmLoadNStrainmm/mmStressMpa000.900.0500.61100.024100.834694.340.01238.890.8322687.750.01106.634201.674831.410.021245.871.6652884.170.021114.427302.54781.080.31243.32.4982981.60.031118.292403.334918.830.042250.313.3323048.760.042120.957504.174926.580.052250.714.1653071.70.052121.8676055257.070.062267.534.9983112.230.062123.475705.835437.010.073276.685.8322877.540.073114.164806.665575.880.083283.756.665-645.5210.083-25.61816.755584.210.083283.756.665-645.5210.084-25.6181.16.765584.040.084284.176.757-791.9850.084-31.411008.335775.180.104293.894 . R. P. a. M. A. Q. Ahamad, "Adsorption and inhibitive properties of some new Mannich bases of Isatin derivatives on corrosionof mild steel in acidic media., " Corrosion Science 52, no. 4: 1472-1481., (2010)

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