Under which type of loading does fatigue occur static load p

Under which type of loading does fatigue occur? static load plane load high load repeated load Which of the following may be the Poisson ratio of a material? 0.35 0.52 0.55 0.60

Solution

1.D

Fatigue occurs when a material is subjected to repeated loading and unloading. If the loads are above a certain threshold, microscopic cracks will begin to form at the stress concentrators such as the surface, persistent slip bands (PSBs), and grain interfaces.

2.poissons ratio =0.35 since poissons ratio is between 0 to 0.5