max stress not on the surface
max stress not on the surface
(OP)
Hello all, I am a beginner FEA analyst and would really appreciate your thoughts to some of the problems I am having with my analysis. I have a model where the max von-Mises stress is not on the surface node but inside node of the surface element. I have attached a picture. I am not quite understanding what does it mean and was wondering if anyone could help. Thank you so much in advance.





RE: max stress not on the surface
RE: max stress not on the surface
In terms of the force, I just doesn't understand it. The boundary I have is "frictionless support" on the bold whole to represent the bolt body area, and zero displacement (Z=0) on the area where the bolt head makes contact, the force is pulling it up (in Z). Now I am thinking if I have my boundary correct.
Thank you in advance for your reply.
RE: max stress not on the surface
RE: max stress not on the surface
Another thought is that there is not a guarantee that the maximum VonMises stress will be on the surface. Most load cases lead to that solution, but given the zero stress normal to the surface there may be specific situations in which the vonmises stress has a maximum value at an internal location.