Erroneous result while applying cohesive zone at inclined interface #28581
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Hi @arovinelli @jiangwen84 I was trying to regenerate a patch test for cohesive zone model (see the attached figure, patch test-b). My geometry is a square of 1mm x 1mm dimension. I used BreakMeshByBlockGenerator to break the geometry along its diagonal (diagonal connecting the points (0,1) and (1,0)). Two triangular blocks are created as a result. I inserted PureElasticTractionSeparation CZM at this interface. Then applied displacement boundary condition at the top edge and right edge in order to create a pure mode-II loading. However the generated results are erroneous. Neither the expected traction nor expected displacement are generated. Correct results are being generated for CZM interface aligned along the Cartesian axes for patch test-a. However, for test-b, I suspect that erroneous result being generated has something to do with inclined interface. I applied the same loading/BCs without insertion of cohesive zone and yet the results are exactly same and erroneous. I cannot understand why is it happening. Please help. |
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@AmanKumar0301 |
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Important on the bottom, consideration on the top
something is weird. The result of the simulation you are running are not converged. You can't have different stresses on the two elements (you are using a stress prescribed BC), equilibrium is not satisfied.
Check your residual, I would be really surprised if that is 0~ish. The solution seems to be garbage.
Also did you check results without CZM (you said you did but I'm just curios at this point).
Can you add the tangential traction, which according to your configuration should be identically 0.
Can you ran it using Neumann BC, i.e. traction if your element size is 1. Pressure is kind of a complicated one.
The CZM results are only reporte…