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June 4, 2024 at 7:54 pmLS_DYNA UserSubscriber
I have developed a subroutine for an orthotropic material and implemented in LSDYNA. I want to delete elements once all integration points (in-plane and through thickness) have failed (not only one). Just wondering how that can be done? Thanks
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June 5, 2024 at 3:15 pmAlex R.Ansys Employee
Hello,Â
Failure can be incorporated in the material routine with IFAIL.
- IFAIL =1: the element is eroded as soon as first integration point fails.
- IFAIL<0: abs(IFAIL) states the number of integration points that needs to fail before element erosion.Â
Please let me know if that helps.Â
Thank you,
AlexÂ
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June 5, 2024 at 4:31 pmLS_DYNA UserSubscriber
Thanks, I tried that earlier but did'nt get the results that I was looking for. I have multiple damage modes. I may need to change my deletion criteria.Â
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July 5, 2024 at 4:28 pmigandikoAnsys Employee
Please take a look at *define_element_erosion. Not sure if it works with user material routines but maybe worth a try.Â
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July 5, 2024 at 10:26 pmUshnish BasuAnsys Employee
Actually, IFAIL<0 in MAT_USER_DEFINED specifies the position of the parameter NUMINT in the constants array, where NUMINT specifies the number of integration points that need to fail.
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