I am trying to simulate a three-dimensional crack geometry under mixed-mode (I/II/III) loading in ANSYS. I have calculated the SIFs along the crack front using both KCALC and J-integral approaches. But to my surprise, SIFs from both methods considerably differ from each other.
Can someone explain the possible reasons for the differences? Which method is giving the accurate SIFs for the crack problem.
The results of the analysis are given in the EXCEL sheet.
Simone Palladino
Since the j= (K1^2+K2^2)/E’+K3^2/2G
Where E’ differs between the plain strain and plane stress condition.
Then if you really want to compare the results you need to comput Ks as equal to sqrt(j*…).
I hope to help you.
Best regards.
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