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Negative diagona on Assembled Stiffness Matrix error on nonlinear static study

Question asked by Babis Lazaridis on Oct 11, 2018
Latest reply on Oct 12, 2018 by Babis Lazaridis

hi i have a part that i want to use in a nonlinear static study. the part is made of an elastomer (room temperature vulcanized). i apply a load on the edge and i fix the other end. the study shows a warning that the Assembled Stiffness Matrix has a negative diagona and later it fails showing the message in the picture i have attached. i used fine curvature based mesh with a growth ratio of 1.2 for the part as it has some very small faces, and large problem direct sparce solver. i noticed that the material doesn't affect the error. can someone help me with this?