A colleague of yours has come to you with a question about t

A colleague of yours has come to you with a question about their mesh, they have a general mesh on most of the object with refinement around the sharp edges. They find that as they increase the refinement level the stress keeps increasing and is now beyond the failure stress of the material. What sort of loading could cause this to happen and why?

Solution

Such type of Situation arise only in Cyclic Loading, which is also called Fatigue Loading.

This is explained below:

It was found that, if a nominal load is repeatedly applied and removed to and from the metal, this would be called a cyclic loading. The part would fail after certain number of cycles.

Failure will be caused even if the maximum applied stress is less than than ultimate strength of the material. There are three stages of failure:

The fatigue loading are classified into three main categories: