Why does the Ultimate tensile Strength (UTS) show a different value than when the test sample breaks? Explain why.
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- In what situations would you use a hardess test instead of a Tensile test?Why hardness test needs to perform in engineering practice?A test rod of rust-resistant steel, with a diam. of 12.8 mm and a measuring length of 50.8 mm is subjected to a tensile test. The data from the test is shown in the table below.
- Briefly discuss the differences between the Engineering Stress versus Engineering Strain and the True Stress versus True Strain Diagrams for the test specimen. Briefly explain why the two plots are different. When is the use of Engineering Stress versus Engineering Strain invalid?Describe the behavior of tested materials (mild steel and aluminium) as it responds to increasing load, in tensile test experiment.Draw a typical stress vs strain tensile test curve for the following material and label the axis. A typical brittle material subjected to a tensile stress that has been applied to the material till the sample breaks. 1- label the axis and draw the curve for a brittle material. 2- indicate the maximum strength of the material. 3- show on the portion of the curve where young's modulus can be calculated.
- Briefly comment on the values obtained for the Elastic Modulus, Yield Strength, Ultimate Strength and Toughness of the test specimen as compared to values of various comparable materials found in the literature. Is the test material comparatively strong? Is it stiff? Is it tough? Yield strength is 186Mpa, elastic modulus is 44.8GPa And the ultimate strength is 238.7mpaPart 2 As the area under the stress-strain curve decreases, the toughness___________. stays the same cannot be evaluated increases decreasesBetween 1. Nominal (engineering) stress and true stress and 2. True strain and engineering strain which is always less than the other?