# Reaction forces

**URL:** <https://prepomax.discourse.group/t/reaction-forces/1631>\
**Category:** General Questions\
**Created:** [March 25, 2024, 4:58pm UTC](https://prepomax.discourse.group/t/reaction-forces/1631 "2024-03-25T16:58:23Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Gunnar](https://avatars.discourse-cdn.com/v4/letter/g/ed655f/32.png) [@Gunnar](https://prepomax.discourse.group/u/Gunnar)\
**Post date:** [March 26, 2024, 7:22am UTC](https://prepomax.discourse.group/t/reaction-forces/1631/5 "2024-03-26T07:22:27Z")

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> [@FEAnalyst](#):
>
> They come from contact interference adjustment (sort of interference fit).

For explanation @Agazzotti, you have meshed each part separately which leads to penetrating nodes and distorts the elements between curved surfaces.

 ![a](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/cfb219558e84ef50b277eef45ae8548cc06374b1.png)

To avoid this, simple create a compound part before meshing the assembly and change the mesh setup → Mesh operations → Merge compound parts: No

 ![b](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/c1a88d9c26c9a36b4c04fb2a79ea9a53ac48c86c.png)

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