Error when calculating a hyperelastic model
Error when calculating a hyperelastic model
(OP)
I still get an error that the system matrix has negative eigenvalues. It doesn't calculate even a single increment.
I've read thet this error message usually means that I should improve the mesh. But I quite don't know what would need an inmprovement in my case.
I use Hex, structured mesh, linear elements. I've read in the documentation that hybrid elements are recommended for hyperelasticity, so I use hybrid elements with reduced integration.
In the step module I've turned the nonlinear geometry on. The minimum increment size is 0.001 (I tried smaller).
Thanks in advance for any help.
I've read thet this error message usually means that I should improve the mesh. But I quite don't know what would need an inmprovement in my case.
I use Hex, structured mesh, linear elements. I've read in the documentation that hybrid elements are recommended for hyperelasticity, so I use hybrid elements with reduced integration.
In the step module I've turned the nonlinear geometry on. The minimum increment size is 0.001 (I tried smaller).
Thanks in advance for any help.





RE: Error when calculating a hyperelastic model
RE: Error when calculating a hyperelastic model
This is my first time with hyperelasticity and a just enetered wron costant values (in the table the unit wasn't mentioned). I figured that the unit is MPa and now it completes the analysis.