XFEM or SMART fracture to introduce a crack in APDL

  • Last Post 15 March 2019
AllIDoIsWin posted this 09 March 2019


I would like to perform a 3D fracture analysis of a volumetric model in MAPDL. My goal is to obtain the stress intensity factors for a self-defined crack geometry.

This could basically be performed with the XFEM and SMART method. I have questions regarding both methods.

To try out XFEM I enhanced example 3.8 (Generating a Center Crack in a 3-D XFEM Model (MESH200 Method)) from the MAPL help. Now I am able to introduce a crack with MESH200 elements and to perform the simulation.

My problem here is the post-processing. I am not able to access the nodes along the crack front and to get their coordinates and the stress intensity factors. Could you please give me a hint regarding this issue?


My second question. Is it also possible to introduce an initial crack in a volumetric model with MESH200 elements with the SMART method?


Thank you very much in advance!

DavidW posted this 15 March 2019


You may refer to the example in the help here for post-processing X-FEM results: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v193/ans_frac/fracfcgxfem.html?q=\xfem


Also, SMART does not currently support the use of mesh200 elements in the fracture affected zone. For SMART, you will need to manually create a crack/opening in your mesh. If you are in WB-Mechanical, we have some convenient tools for automatic crack mesh generation such as the Semi-elliptical crack object as well as the Arbitrary crack object.