# Coupled plasticity hydrogen diffusion problem

**URL:** <https://calculix.discourse.group/t/coupled-plasticity-hydrogen-diffusion-problem/1649>\
**Category:** Uncategorized\
**Created:** [May 9, 2023, 3:57pm UTC](https://calculix.discourse.group/t/coupled-plasticity-hydrogen-diffusion-problem/1649 "2023-05-09T15:57:10Z")\
**Posts on this page:** 1\
**Showing post:** 9

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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:** [May 10, 2023, 10:41am UTC](https://calculix.discourse.group/t/coupled-plasticity-hydrogen-diffusion-problem/1649/9 "2023-05-10T10:41:01Z")

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Full input files can be shared by adding a link to some hosting website like WeTransfer, Dropbox or Google Drive. When the mesh contains just a few elements (like here), it might be also sufficient to use a preformatted text option like you did - then the post is not too long because there’s an additional scroll bar for the code.

I wouldn’t be very surprised if there was a bug leading to unusual behavior when coupled tem-disp step is used for purely mechanical case. I’ve encountered something like that but for opposite case (pure heat transfer in coupled temp-disp analysis): [Wrong results if \*Coupled temp-disp is used instead of \*Heat transfer](https://calculix.discourse.group/t/wrong-results-if-coupled-temp-disp-is-used-instead-of-heat-transfer/998)

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