# Cohesive Zone Modeling (CZM) — Workarounds, Examples, UEL Visualization **URL:** \ **Category:** General Questions\ **Created:** [February 19, 2026, 7:46am UTC](https://prepomax.discourse.group/t/cohesive-zone-modeling-czm-workarounds-examples-uel-visualization/3269 "2026-02-19T07:46:12Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [February 19, 2026, 8:01am UTC](https://prepomax.discourse.group/t/cohesive-zone-modeling-czm-workarounds-examples-uel-visualization/3269/2 "2026-02-19T08:01:31Z")
Yes, CalculiX doesn’t have any CZM (unlike Abaqus). Might be better to ask for workarounds (especially involving subroutines) on [its forum](https://calculix.discourse.group/). When it comes to workarounds with built-in features, there’s just no separation contact (not predefined, needs a specific setup) and you could add a thin layer of elements with a specific material model (including no tension or no compression, orthotropy and so on). You could also try using some UELs from Abaqus. This particular application is mentioned here: [User Element Troubleshooting - CalculiX (official versions are on www.calculix.de, the official GitHub repository is at https://github.com/Dhondtguido/CalculiX).](https://calculix.discourse.group/t/user-element-troubleshooting/2468) Regarding subroutines in PrePoMax, check this thread: [UMAT option in PrePoMax](https://prepomax.discourse.group/t/umat-option-in-prepomax/606) However, I would also consider using a different solver such as Code\_Aster - I think it has CZM. Or even OpenRadioss if you need explicit dynamics. --- _[View the full topic](https://prepomax.discourse.group/t/cohesive-zone-modeling-czm-workarounds-examples-uel-visualization/3269)._