# Inhibit Slipping Behavior in PFC3D

**URL:** <https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903>\
**Category:** PFC\
**Tags:** faq\
**Created:** [January 31, 2023, 10:02pm UTC](https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903 "2023-01-31T22:02:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![awbrandt](https://avatars.discourse-cdn.com/v4/letter/a/cdc98d/32.png) [@awbrandt](https://forum.itascainternational.com/u/awbrandt)\
**Post date:** [January 31, 2023, 10:02pm UTC](https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903/1 "2023-01-31T22:02:53Z")

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Is there a way to prevent sliding (or inhibit slipping behavior) in the Hertz model for a clump in PFC3D Version 7, other than by increasing the friction coefficient?

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**Author:** ![dblanksma](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@dblanksma](https://forum.itascainternational.com/u/dblanksma)\
**Post date:** [February 1, 2023, 7:31pm UTC](https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903/2 "2023-02-01T19:31:11Z")

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Hello awbrandt,

To inhibit the entire contact you can use the **contact inhibit** command. But if you wish to just inhibit the shear behavior of the contact, I would guess setting the friction to a large value would be the best option.

– Derrick

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**Author:** ![uncleyuan](https://avatars.discourse-cdn.com/v4/letter/u/f17d59/32.png) [@uncleyuan](https://forum.itascainternational.com/u/uncleyuan)\
**Post date:** [February 7, 2023, 2:00pm UTC](https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903/3 "2023-02-07T14:00:34Z")

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Hello dblanksma，  
I am a 3DEC demestrate-mode user and master of civil engineering， in PFC, you can use the **contact inhibit** command to inhibit the uninterested contact， if this command or similar command can be used in 3DEC5.2 or 7.0 to to inhibit the uninterested contact? I am sincerely looking forward to your kind reply!

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**Author:** ![dblanksma](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@dblanksma](https://forum.itascainternational.com/u/dblanksma)\
**Post date:** [February 9, 2023, 3:08pm UTC](https://forum.itascainternational.com/t/inhibit-slipping-behavior-in-pfc3d/903/4 "2023-02-09T15:08:23Z")

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Hello @uncleyuan,

I am not aware of a command in 3DEC that is similar to contact inhibit. Please post this question in the 3DEC category ([3DEC - Itasca Software Forum](https://forum.itascainternational.com/c/3dec/6))

Thanks