I was given a brief for a steel shaft with a transverse hole under simple tension as shown in the problem descriptor below.
The aim of this report is to find the effects of applying a tensional load to a steel shaft with a transverse hole. The material of the shaft had an average yield stress of 400 MPa. A finite element analysis was performed using the parameters provided in the brief, to find what effects applying a load would have on the geometry.
The geometry analysed was as shown in quarter model image as shown below:
The final image shows the vonmises stress which is 41.89 MPa, theoretical value was calculated to be 41.62 MPa:
However, this geometry should exceed 400 MPa as detailed in the brief to make changes to bring the maximum vonMises under the maximum yield stress. The tensional force applied is 10 kN.
Any solutions as to why the values seem to be off by a factor of 10?