Test: Stress Concentration & Its Factors - Mechanical Engineering MCQ

Explanation: The given statement is true apart from the fact that there is no change in the cross section.

Explanation: The stress concentration factor is just the reciprocal of that cited in the question.

For any ellipse, K=1+2 x (semi major axis/semi minor axis).

Explanation: K=1+2 x (semi major axis/semi minor axis. Hence K is inversely proportional to the semi minor axis.

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.

Explanation: There is a similarity between velocity distribution in fluid flow in a channel and the stress distribution in an axially loaded plate. The equations for flow potential and in fluid mechanics and stress potential in solid mechanics are same.

 Explanation: The sharp bending of a force flow line is reduced due to multiple notches.

Explanation: All the mentioned options reduce the sharp bending of a force flow line.