# Can user materials be used in a dynamic explicit step?

**URL:** https://calculix.discourse.group/t/can-user-materials-be-used-in-a-dynamic-explicit-step/2388
**Category:** Uncategorized
**Created:** [August 27, 2024, 1:39pm UTC](https://calculix.discourse.group/t/can-user-materials-be-used-in-a-dynamic-explicit-step/2388 "2024-08-27T13:39:05Z")
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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: [August 27, 2024, 2:23pm UTC](https://calculix.discourse.group/t/can-user-materials-be-used-in-a-dynamic-explicit-step/2388/2 "2024-08-27T14:23:20Z")

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I don’t think it’s mentioned in the documentation and I haven’t seen any working analyses like that. Abaqus has separate subroutines for implicit and explicit solver (e.g. UMAT and VUMAT). But give it a try and let us know, it would be nice to have a confirmation if it’s possible in CalculiX.

> [@Using Abaqus VUMAT files in CalculiX](https://calculix.discourse.group/t/using-abaqus-vumat-files-in-calculix/1027):
>
> Hello Everyone, Does anyone have experience using Abaqus VUMAT files in CalculiX? I am looking for example files to get going. Many thanks, JW

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