# Nlgeom and Kinematic Coupling

**URL:** <https://calculix.discourse.group/t/nlgeom-and-kinematic-coupling/2343>\
**Category:** Uncategorized\
**Created:** [July 19, 2024, 7:51am UTC](https://calculix.discourse.group/t/nlgeom-and-kinematic-coupling/2343 "2024-07-19T07:51:40Z")\
**Posts on this page:** 1\
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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:** [July 19, 2024, 8:22am UTC](https://calculix.discourse.group/t/nlgeom-and-kinematic-coupling/2343/2 "2024-07-19T08:22:20Z")

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There’s a know issue with non-convergence in models involving shells, rigid body constraints and Nlgeom. Maybe a similar problem can occur with coupling constraints: [Rigid-body constraint convergance problems](https://calculix.discourse.group/t/rigid-body-constraint-convergance-problems/369)

Did you try solving the same model with solid elements ?

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