Failure Criteria

Hello Friends,

I am struggling to correlate FEA results with experimental
results. I work on polymer parts reinforced with glass fibers. I have stress
strain curves for the material till failure. My FEA results are 50% off from
the experimental results. The model is setup correctly.

I think my biggest problem is deciding a failure criteria
在软件内。我不知道如何with a criteria that will
decide the load at failure. Do I look at the load when the 1st
element reaches the Ultimate Tensile Strength of the material? Or do I look at
the load at which a certain percentage (say 15%) of elements cross the Ultimate
Tensile Strength of the material. I want to know

1.
1.How you decide based on the FEA results whether
将失败或没有t?

2.2.
How much correlation have you got when dealing
with polymer parts reinforced with glass fibers?

3.
3. What is the industry practice that works best?

Thanks

Anup

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