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Can anyone suggest which failure stress should consider for this model

Question asked by Kirubakaran Ramamurthy on Apr 29, 2015
Latest reply on Apr 29, 2015 by Andrei Popov

Currently I am analysing Brake Flange component , Here there are 4 Bolts which acting 106206 N -total. I need to analyse whether is it safe or not.

I did 2 iteration for ductile material - 350 Mpa Yield Strength.

1. The Von-Mises Value is 840 Mpa & Principle Stress P3 - 192 Mpa ( Due to compressive Load ),

    

     Here Von Mises value is not within the limit of yield strength, but P3 value is in limit. In this condition I consider von mises value

     So this is not in safe. In Practical this gets crack , so analysed value is right.

2. I changed the design and analysed the flange for same material.

     Now Von Mises Value - 470 Mpa & P3 - 178 Mpa

 

    

Here Von Mises value is not within the limit of yield strength, but P3 Value is in limit. In this condition I said von - mises value .

So this is not in safe. In Practical this is OK.

 

Kindly give the solution for this model.

 

Give difference between Von-Mises, Principal Stress P1, P2,  & P3

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