Learning Forum

[Ikram.MARZOUKI]

Hello everyone,

I am working on a three-point bending simulation on a composite sandwich structure with a NIDA core in ANSYS Mechanical.

In my model, I apply a Remote Displacement on the upper cylinder, with a prescribed translation in the Z direction. After running the simulation, I evaluate the failure criteria of the composite facesheets.

What I would like to achieve is the following:
instead of prescribing a final displacement value and checking failure afterward, I want the simulation to automatically stop at the displacement where the first failure criterion is reached (damage initiation or rupture).

In other words, I would like the solver to stop when a failure index reaches 1, and to directly obtain the corresponding displacement value.

Is there a way in ANSYS Mechanical to:

• stop the analysis based on a composite failure criterion, or

• link the stopping condition to damage initiation, material failure, or a user-defined result?

Any guidance, examples, or recommended approaches (e.g. nonlinear analysis, APDL commands, user-defined results, or damage models) would be greatly appreciated.

Thank you very much for your help.

Best regards,