Young's modulus can be used to calculate the strain for a stress that is:
A)just below the ultimate strength
B)just above the ultimate strength
C)well below the yield strength
D)well above the yield strength
E)none of the above

Question

Quizplus · Accepted Answer

Young's modulus can only be used to calculate strain for stress values that are in the elastic region, i.e. well below the yield strength. If the stress is just below the ultimate strength or well above the yield strength, the material will experience plastic deformation and the relationship between stress and strain will not be linear, making it impossible to calculate strain using Young's modulus.

Young's Modulus Can Be Used to Calculate the Strain for a Stress