Chris_46
Mechanical
- Jun 25, 2020
- 1
Hello
I'm performing a non-linear fracture mechanics analysis of a compact tension specimen with the unstructured mesh method (UMM) using a tetrahedorn mesh. Generally the model works well except for one issue with the contour line of the j-integral. When I'm doing a mesh refinement e.g. from 0.2mm to 0.1mm around the crack tip my j-integral contour becomes more "wavy". This is against my excpectaions for the effects of a mesh refinement. Any thougths on which parameters could influence this behavior? I've attached some images to show the issue.
Thanks
Global mesh and equivalent plastic strain:
J-Integral with 0.2mm Mesh around crack tip:
J-Integral with 0.1mm Mesh around crack tip:
I'm performing a non-linear fracture mechanics analysis of a compact tension specimen with the unstructured mesh method (UMM) using a tetrahedorn mesh. Generally the model works well except for one issue with the contour line of the j-integral. When I'm doing a mesh refinement e.g. from 0.2mm to 0.1mm around the crack tip my j-integral contour becomes more "wavy". This is against my excpectaions for the effects of a mesh refinement. Any thougths on which parameters could influence this behavior? I've attached some images to show the issue.
Thanks
Global mesh and equivalent plastic strain:
J-Integral with 0.2mm Mesh around crack tip:
J-Integral with 0.1mm Mesh around crack tip: