Composite Failure Analysis 1

[puzha518]

The default output for composite failure analysis is the "Failure Index". Is there any way to output the "Margin of Safety" or "Factor of Safety"? For Tsai-Hill or Maximum Stress Criteria, we can calculate the Facotr of Safety from failure index. However, with Tsai-Wu or Hoffman, it is not easy to calculate the factor of safety from the failure index. Any suggestions. Thanks a lot.

 

[Onda]

I think that this thread could be of some help.

http://www.eng-tips.com/viewthread.cfm?qid=222534

Regards

 

[SWComposites]

huh? FS = 1/FI MS = FS-1

 

[puzha518]

For Maximum stress and strain criteria, FS = 1/FI
For Tsai-Hill, FS = 1/Sqrt(FI)
For Tsai-Wu and Hoffman, you have to solve a quadratic equation for FS. There is no simple equations between FS and FI.