Recent content by Vishakh_Rajendran

Hello all, Could you please explain the meaning of the following warning message - 'Mapping of the generated node XYZ to the closest model element ABC is not successful -- the nodel iso-coordinates are ...'. This warning is seen in an XFEM analysis. Thank you in advance, Vishakh.

Thank you very much for the response. But, are you aware of any law which can be implemented through the subroutine for this scenario?

Hello, The answer to this is pretty simple. Let us assume you have a demo cube (solid element). Let us pin one side of the cube (U1 = U2 = U3 = 0) and let us apply a tensile loading on the other side (U1 = U2 = 0 and U3 = say 1) (See the attachments). Let me create a Reference point and let...

Hello, I am trying to find out the 'Crack initiation Criterion' which is available as an history output in an ABAQUS contour integral simulation. But the prediction of this 'Crack initiation Criterion' using the three conditions of 1. MTS, 2. MERR and 3. K2 = 0 works only for Isotropic...

Hello, Thank you for the reply. There is no negative eigen values in my case. Thank you for sharing the documentation chapter. I was working with a demo model and ofcourse, I seem to have made a very bad choice of the material properties. Thank you.

Thanks very much. It just seems to be a very bad choice of the material properties in the transverse directions which made the stiffness matrix non-positive definite (maybe). With acceptable material properties in the transvserse directions, the resutls converge fine. Best Regards, Vishakh.

Hello, I have a query with the Contour integrals capability in ABAQUS. When I request Stress Intensity Factor (SIF) results for an Isotropic material, there is very good convergence in the SIF results between contours 2. I try to request SIF results for a Composite (material defined...

Structured meshing and Sweep meshing technique results in a ordered sequencing of the elements. Say, if you have a rectangular part (with no cutouts or without any stress risers), you can use a structured mesh in this case. Say, if you have a small circular cutout (or a crack), you can have...

Hello, The most important point is that, in your case, as per your question, the two parts are initially disconnected and they need to move towards each other and make contact. This type of analysis will always converge if you apply a boundary condition on the rigid body reference point. But...

Hello, For the same model features, should the conditions support the usage (if we don’t have a complex load path / nonlinear load path / any non-linearity), a static linear perturbation step is faster than a general static step (and a static linear perturbation should be used in such cases)...

Even within the same part, if you can create different sets (can be geometry based or elements based), then you can assign different material definitions / section definition to the different sets. BR, Vishakh.

The usage of python in ABAQUS can be for both pre - processing and post - processing (I mean comple pre - processing and complete post - processing). You can model the geometry, create the material, BC's, mesh etc etc and anything and everything using Python in ABAQUS. Example 1: The command...