Hi all
I have a model which is a bracket made of 8mm-thick plates and is bolted to a fixed plate by four bolts and a 1KN load on the other end .
I created four bolt connections and run the simulation. The maximum principal stresses are 96.2, 63.4 and 22.1 MPa, but the maximum resultant Von Mises stress calculated by the program is 290 MPa. I assume this should be around 90MPa. I cannot justify the jump in magnitude of stress based on Von Mises stress formula.
Could you please give me some advice in this regard?
Regards,
Reza Kharrazi
I have a model which is a bracket made of 8mm-thick plates and is bolted to a fixed plate by four bolts and a 1KN load on the other end .
I created four bolt connections and run the simulation. The maximum principal stresses are 96.2, 63.4 and 22.1 MPa, but the maximum resultant Von Mises stress calculated by the program is 290 MPa. I assume this should be around 90MPa. I cannot justify the jump in magnitude of stress based on Von Mises stress formula.
Could you please give me some advice in this regard?
Regards,
Reza Kharrazi
Thanks for your reply. Yes, it is around the edge of one of the holes where the bolt connections have been defined. The edge is located between two plates on nut side.
My questions are:
First, why I can't see this high stress concentration in principal stress' values as well.
Second, how should I interpret the results? Since this Von Mises stress is far above yield stress.
Third, what measures do I have to take to reduce the effect of this high stress? The part a simple support bracket made of steel plate.
Many thanks in advance,
Reza
Rob Stupplebeen