# Creep models for joint planes in 3DEC v5.2

**URL:** <https://forum.itascainternational.com/t/creep-models-for-joint-planes-in-3dec-v5-2/888>\
**Category:** 3DEC\
**Created:** [January 14, 2023, 11:47am UTC](https://forum.itascainternational.com/t/creep-models-for-joint-planes-in-3dec-v5-2/888 "2023-01-14T11:47:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![VijayKiranKota](https://avatars.discourse-cdn.com/v4/letter/v/c4cdca/32.png) [@VijayKiranKota](https://forum.itascainternational.com/u/VijayKiranKota)\
**Post date:** [January 14, 2023, 11:47am UTC](https://forum.itascainternational.com/t/creep-models-for-joint-planes-in-3dec-v5-2/888/1 "2023-01-14T11:47:55Z")

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Hi,  
What joint creep mat models are supported by 3DEC v5.2?  
Can I analyze the creep behaviour of a jointed rockmass using the MC-slip / CY jmat models combined with zone constitutive Power-Law visco-plastic or WIPP-creep visco-plastic models? Will the combination hold up for real-time (creep time) analyses?  
Many thanks,  
-Vijay

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**Author:** ![markus](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/markus/32/288_2.png) [@markus](https://forum.itascainternational.com/u/markus)\
**Post date:** [January 16, 2023, 12:19pm UTC](https://forum.itascainternational.com/t/creep-models-for-joint-planes-in-3dec-v5-2/888/2 "2023-01-16T12:19:27Z")

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That entirely depends on whether you actually want to have “creeping” joints, e.g. joints with a time-dependent shear behavior. In that case, you will probably have to create your own custom creeping joint model.

If you just want to model a creeping material e.g. connected by some weakness planes with time-independent shear properties, you can use the built-in models as you suggested.

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**Author:** ![jhazzard](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\
**Post date:** [January 16, 2023, 3:19pm UTC](https://forum.itascainternational.com/t/creep-models-for-joint-planes-in-3dec-v5-2/888/3 "2023-01-16T15:19:27Z")

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There is a power-law joint creep model in version 7. See here: [Power Law Creeping Joint Model In 3DEC — 3DEC 7.0 documentation](http://docs.itascacg.com/3dec700/3dec/docproject/source/theory/creep/creep.html?node2200)