# Yielding in geogrid / liner structural elements
**URL:** https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953
**Category:** FLAC3D
**Created:** [March 5, 2023, 11:01am UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953 "2023-03-05T11:01:40Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Francesco\_IT](https://forum.itascainternational.com/u/Francesco_IT)
#### Post date: [March 5, 2023, 11:01am UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953/1 "2023-03-05T11:01:40Z")
Hi,
is there a way, maybe via a FISH, to account for plasticity in structural behavior for geogrid and liner elements?
Thank you in advance.
---
### Author:  [@cheng](https://forum.itascainternational.com/u/cheng)
#### Post date: [March 6, 2023, 2:10am UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953/2 "2023-03-06T02:10:25Z")
Geogrid is a beam-type 1D structure, and liner is a shell-type 2D structure, so just check the related plasticity FISH intrinsics for beam and shell.
---
### Author:  [@Francesco\_IT](https://forum.itascainternational.com/u/Francesco_IT)
#### Post date: [March 6, 2023, 11:10am UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953/3 "2023-03-06T11:10:22Z")
Hi,
geogrid is 2D type (cable is 1D type) but in FISH library there are no functions to limit the internal forces. So, I was wondering if there is however a way to include structural yielding in these elements.
---
### Author:  [@dpotyondy](https://forum.itascainternational.com/u/dpotyondy)
#### Post date: [March 6, 2023, 7:52pm UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953/4 "2023-03-06T19:52:50Z")
The beams and shells in FLAC3D version 9 now support plasticity; therefore, the geogrids and liners can yield. This is not available in FLAC3D version 7, and there is no simple way to provide plastic behavior.
---
### Author:  [@Newuser](https://forum.itascainternational.com/u/Newuser)
#### Post date: [May 16, 2024, 7:43pm UTC](https://forum.itascainternational.com/t/yielding-in-geogrid-liner-structural-elements/953/5 "2024-05-16T19:43:36Z")
@dpotyondy I modeled a pile supported embankment with and without geogrid. Even with the geogrid, my output for settlement is not changing and I feel that geogrid in my model is not working. I followed the “Geogrid reinforced embankment” FLAC 3D example to model the geogrid but I could not find out what I missed… Would you like to help me in this?