Question

what is proportional limit?​

Answer 1

Explanation:

The proportional limit is the point on a stress-strain curve where the linear, elastic deformation region transitions into a non-linear, plastic deformation region. In other words, the proportional limit determines the greatest stress that is directly proportional to strain. The transition point can be calculated by a specified percent change in slope. Because the proportional limit is not required by many test standards, it is often used for educational purposes rather than in practice by the materials testing industry.