Difference between engineering and true stress and strain

Question

Accepted Answer

Engineering stress and strain are calculated using original dimensions, while true stress and strain take into account the change in dimensions during deformation.

Engineering stress is calculated using the original cross-sectional area of the specimen, while true stress considers the actual cross-sectional area at any given point during deformation.
Engineering strain is calculated based on the original length of the specimen, while true strain takes into account the instantaneous change in length during deformation.
True stress and strain provide a more accurate representation of the material's behavior under load compared to engineering stress and strain.
For example, in a tensile test, as the material necks down, the cross-sectional area decreases, leading to higher values of true stress compared to engineering stress.

Difference between engineering and true stress and strain

Top Tata Steel Engineer Trainee interview questions & answers

Popular interview questions of Engineer Trainee

Top HR questions asked in Tata Steel Engineer Trainee