Cylindrical cup drawing analysis - PEEQ
2008-04-24 17:18:49 GMT
Dear group members,
I am simulating deep drawing of a cylindrical cup made of mild steel. The material model applied is the nonlinear isotropic/kinematic combined hardening model provided ABAQUS. Usually applied for metals under cyclic loading. Applied blank holder force is 70kN and friction coefficient is 0.01. I ran the simulation using the implicit ABAQUS/Standard since comparison is to be carried on with UMAT.
Given maximum PEEQ is 46%.
Friction coefficient is then increased to 0.03. I applied the general finite-sliding contact interaction. Though the analysis was completed, however the mesh around punch fillet area is distorted and given PEEQ values for elements at this area are more than 100%. What does this suppose to mean?
Does it mean:
1. Nothing can be concluded since the mesh is distorted
2. Correspondingly to the highly distorted mesh, it is natural that PEEQ is very high.
3. Actually the material would tear apart however this is simulated as the significantly streched elements?
Can ABAQUS simulate cases when the material would actually be torn apart ?
I would appreciate any suggestions or comments.
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