The parte with the numerical singularity is a cantilever beam encastred in one end. It has an elastic modulus of 552 MPa, while the cell, that is pulling on the other end, has 10 kPa.
It works fine with rough contact and linear elastic behaviour, and lagrange contact with porous elastic...
Here I have some specific errors:
1) Using an hyperelastic behaviour, rough interaction, small sliding and surface to surface discretization I get:
***WARNING: THE SYSTEM MATRIX HAS 44 NEGATIVE EIGENVALUES.
EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE...
Hello everyone.
I have been reading this forum for long time to answer most questions I have had. Nevertheless, I haven't found the answer to the following problem:
I am modelling a contact problem consisting of two plates and a cell between them. The top plate is a cantilever beam modelled...
