# Problem with shell extrusion

**URL:** <https://community.freefem.org/t/problem-with-shell-extrusion/687>\
**Category:** General Discussion\
**Created:** [December 13, 2020, 4:02pm UTC](https://community.freefem.org/t/problem-with-shell-extrusion/687 "2020-12-13T16:02:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ilk](https://avatars.discourse-cdn.com/v4/letter/i/0ea827/32.png) [@ilk](https://community.freefem.org/u/ilk)\
**Post date:** [December 13, 2020, 4:02pm UTC](https://community.freefem.org/t/problem-with-shell-extrusion/687/1 "2020-12-13T16:02:39Z")

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Hello,

I am a newbie on FreeFEM and I want to solve a squeeze problem. The problem is this:

Two rigid plates sandwich a curved plate made of elastic material, gradually move one of the rigid plates, and finally flatten the middle curved plate. I need to get the displacement of the middle curved plate.

I have completed the meshing of three plates, as shown below.

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/freefem/original/1X/188abff51fce5fd64b7db97d96326b1e94b13ddd.png)

Which part of the doc should I refer to for this implementation?

Elvin