Report a QuestionPlease email hello@efficientengineer.com. Question 40 Material Properties | Stress-strain curves | difficulty level 3The equation below can be used to calculate the true stress σt based on the engineering stress σe and the engineering strain εe.σt=σe(1+εe)Beyond what point is this equation typically no longer considered to be applicable? Beyond yielding Beyond necking It is applicable for all strain levels Beyond the proportional limit Report this questionExplanationThe derivation of the true stress equation makes an assumption that the material volume remains constant duing the tensile test. This is no longer true once necking occurs, due to the sudden reduction in the cross-sectional area of the test piece, and as such this equation is only valid up to the onset of necking.Your Results Restart with New Questions Change Quiz Settings Review the Questions
