# Copen abaqus/ccx

**URL:** <https://calculix.discourse.group/t/copen-abaqus-ccx/2657>\
**Category:** Uncategorized\
**Created:** [April 2, 2025, 9:50am UTC](https://calculix.discourse.group/t/copen-abaqus-ccx/2657 "2025-04-02T09:50:13Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [April 2, 2025, 9:57am UTC](https://calculix.discourse.group/t/copen-abaqus-ccx/2657/2 "2025-04-02T09:57:59Z")

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> [@Iacobellis88](#):
>
> how can get the same value the penalty stiffness that abaqus uses in hard contact?

We don’t know exactly what penalty stiffness Abaqus uses for hard contact:

> [@Penalty factor abaqus vs calculix](https://calculix.discourse.group/t/penalty-factor-abaqus-vs-calculix/2219):
>
> Does anyone know how calculate penalty stiffness in abaqus HARD contact? I tried to do CNORM/CDISP\*CAREA but I didnt get good results. I would like to know to perform a correlation between calculix and abaqus penalty factor.

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