# History for facets

**URL:** <https://forum.itascainternational.com/t/history-for-facets/706>\
**Category:** PFC\
**Created:** [August 12, 2022, 8:55am UTC](https://forum.itascainternational.com/t/history-for-facets/706 "2022-08-12T08:55:09Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![nibel22](https://avatars.discourse-cdn.com/v4/letter/n/e19adc/32.png) [@nibel22](https://forum.itascainternational.com/u/nibel22)\
**Post date:** [August 12, 2022, 8:55am UTC](https://forum.itascainternational.com/t/history-for-facets/706/1 "2022-08-12T08:55:09Z")

</div>

Hey everyone,

I want to simulate a pile penetration process in 2D with a pipe pile and need the information of the contact forces of the different parts of the pile (tip, shaft). I have modelled the pile as two boxes. To make sure that the parts of the wall keep together, I used the keyword “one-wall”. However, now I seem to only being able to acces the contact force of the whole “box”. Does anybody know how to get the history of the single facets?  
Thank you in advance!

Best,  
Nick

---

<div class="post-metadata">

**Author:** ![kjaradat](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/kjaradat/32/838_2.png) [@kjaradat](https://forum.itascainternational.com/u/kjaradat)\
**Post date:** [August 13, 2022, 3:36am UTC](https://forum.itascainternational.com/t/history-for-facets/706/2 "2022-08-13T03:36:20Z")

</div>

Hi Nick,

You can create the pile using different walls, not necessarily using the “onewall” keyword . Another trick to use is to create measuring spheres in the vicinity if the tip and the shaft to get the stresses/strains.

Cheers,  
Karam

---

<div class="post-metadata">

**Author:** ![n.ehringhausen](https://avatars.discourse-cdn.com/v4/letter/n/7bcc69/32.png) [@n.ehringhausen](https://forum.itascainternational.com/u/n.ehringhausen)\
**Post date:** [August 15, 2022, 7:11am UTC](https://forum.itascainternational.com/t/history-for-facets/706/3 "2022-08-15T07:11:24Z")

</div>

Dear Nick,  
unfortunately there is no way to get the history of specific facets. So that I have to agree with Karam using different ways to evaluate is probably your best option.

---

<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:** [August 15, 2022, 3:53pm UTC](https://forum.itascainternational.com/t/history-for-facets/706/4 "2022-08-15T15:53:30Z")

</div>

Hello Nick,  
One possibility for creating a history for a specific facet would be to create a _FISH_ history ([doc here](http://docs.itascacg.com/flac3d700/common/kernel/doc/manual/fish/commands/cmd_fish.history.html?node1588)). This would require looping through all contacts on the specific facet, summing the forces and writing the result to your _FISH_ history.  
This could become computationally inefficient if there are many contacts on the facet (as the _FISH_ history will be called every ten cycles). If quick computation is important, you could consider using _FISH_ operators ([doc here](http://docs.itascacg.com/flac3d700/common/docproject/source/manual/scripting/fish_scripting/fish_operators.html?node3659)).