# PFC3D Version 7 Contact Model Code

**URL:** <https://forum.itascainternational.com/t/pfc3d-version-7-contact-model-code/909>\
**Category:** PFC\
**Created:** [February 5, 2023, 4:30am UTC](https://forum.itascainternational.com/t/pfc3d-version-7-contact-model-code/909 "2023-02-05T04:30:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![awbrandt](https://avatars.discourse-cdn.com/v4/letter/a/cdc98d/32.png) [@awbrandt](https://forum.itascainternational.com/u/awbrandt)\
**Post date:** [February 5, 2023, 4:30am UTC](https://forum.itascainternational.com/t/pfc3d-version-7-contact-model-code/909/1 "2023-02-05T04:30:10Z")

</div>

Is there a way to modify an existing PFC3D Version 7 contact model rather than build your own from scratch (is there existing code for the Hertz model so that I can alter some of its characteristics/behavior)?

---

<div class="post-metadata">

**Author:** ![dblanksma](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@dblanksma](https://forum.itascainternational.com/u/dblanksma)\
**Post date:** [February 7, 2023, 2:35am UTC](https://forum.itascainternational.com/t/pfc3d-version-7-contact-model-code/909/2 "2023-02-07T02:35:11Z")

</div>

Hello,

Yes, here is a link to the source code for the Hertz contact model in _PFC_ 7.00. ([Hertz Model Implementation — PFC 7.0 documentation](http://docs.itascacg.com/pfc700/pfc/docproject/source/manual/optional_features/plugins/cmhertzfiles.html?node3426)).

You can also check out the following link for implementing your own contact model - [Contact Model Plug-ins — PFC 7.0 documentation](http://docs.itascacg.com/pfc700/pfc/docproject/source/manual/optional_features/plugins/cmodel_plugins.html?node3421)