Question

The yield point of a material does not exist for those materials that have a _____________ region in that space of the stress-strain curve.

(a) smooth

(b) shift

(c) turbulent

(d) high

This question was posed to me in homework.

My question comes from Aircraft Materials topic in chapter Testing Aircraft Materials of Aerospace Materials & Processes

Answer 1

The correct answer is (a) smooth

Easiest explanation: The materials that have a sharp break in the yield point of the stress-strain curve tend to have a yield point. These are materials like wrought iron. Other materials have a smooth region in the place of the sharp break of yield point, hence do not have this property.