Question

In which of the following case stress concentration factor is ignored?

(a) Ductile material under static load

(b) Ductile material under fluctuating load

(c) Brittle material under static load

(d) Brittle material under fluctuating load

I encountered this question by my guide.

This challenging question is from the Stress Concentraion and its Factors concept in module Design Against Fluctuating Load of Machine Design

Answer 1

The accurate answer is (a) Ductile material under static load

The explanation is: In ductile materials under static load,  there is plastic deformation near yielding point and hence redistribution of stresses take place. The plastic deformation is restricted to a smaller area and hence no perceptible damage take place.