Mechanical Properties of Solids

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Question : 2
Total: 21
Figure shows the stress-strain curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?
Solution:  
(a) From graph,
for stress =150×106Nm2, the corresponding strain =0.002
Young's modulus, =7.5×1010Nm2
(b) Approximate yield strength will be equal to the maximum stress it can sustain without crossing the elastic limit
Therefore, the approximate yield strength =300×106Nm2
=3×106Nm2 .
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