Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 6.13, Problem 83SEP
Referring to Figures 6.20 and 6.21 (read the figure captions for details), determine (a) the change in length of the aluminum specimen (gage length) when the engineering stress reaches 85 ksi. (b) If at this point the specimen is slowly unloaded to zero load, what will the length of the specimen be in the unloaded state? (Show the unloading curve schematically).
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The following data are obtained from a
tensile test of a copper specimen.
- The load at the yield point is 158 kN.
- Length of the specimen is 26 mm.
- The yield strength is 75 kN/mm?.
- The percentage of elongation is 40 %.
Determine the following
(v) Final diameter if the percentage of
reduction in area is 21 %.
Final Area of the Specimen at Fracture (in
mm)
Final Diameter of the Specimen after
Fracture (in mm)
As Fast As you can
Please mak sure the answer is correct 100%
Please match the following to the appropriate areas or sublocations illustrated on the steel stress-strain curve shown below:
(ultimate tensile stress- yield stress - repture stress)
(4) The maximum stress point on the stress strain curve.
(2) The point where the proportional limit ends and the moment the elastic limit of the specimen is reached, the specimen will return to its original state after the loading is removed. Typically occurs before the steel specimen starts to plastically yield.
(5) The point at which the steel specimens has underwent necking and breaks. This typically occurs after the maximum stress is reached during the experiment.
Tensile test is a method to investigate the elasticity of a material. A test specimen is placed between two clamps and these clamps will move in opposite directions, hence straining the test specimen. This experiment will yield a stress-strain curve that shows each of the stages of the specimen for every load is applied.
With an aid of sketching diagrams, describe the stages that the specimen experiences before it breaks, and relate it with the stress-strain curve. It is expected that each stage comes with a sketching of the specimen and explanation of the current stage.
Chapter 6 Solutions
Foundations of Materials Science and Engineering
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