# Apply inclined and/ or non-uniform pressure on shell or liner

**URL:** <https://forum.itascainternational.com/t/apply-inclined-and-or-non-uniform-pressure-on-shell-or-liner/365>\
**Category:** FLAC3D\
**Created:** [March 18, 2022, 6:19am UTC](https://forum.itascainternational.com/t/apply-inclined-and-or-non-uniform-pressure-on-shell-or-liner/365 "2022-03-18T06:19:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![FLAC3D\_GEO](https://avatars.discourse-cdn.com/v4/letter/f/f1d935/32.png) [@FLAC3D\_GEO](https://forum.itascainternational.com/u/FLAC3D_GEO)\
**Post date:** [March 18, 2022, 6:19am UTC](https://forum.itascainternational.com/t/apply-inclined-and-or-non-uniform-pressure-on-shell-or-liner/365/1 "2022-03-18T06:19:35Z")

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Hi All, according to the manual, only uniform pressure (normal to the surface) can be applied on the liner or shell elements. Is there any convenient way to apply inclined and/ or non-uniform pressure on shell or liner? Looks like we will have to manually calculate equivalent concentrated force on each load and then apply via “structure node apply …”?

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**Author:** ![cheng](https://avatars.discourse-cdn.com/v4/letter/c/ecccb3/32.png) [@cheng](https://forum.itascainternational.com/u/cheng)\
**Post date:** [March 22, 2022, 2:57am UTC](https://forum.itascainternational.com/t/apply-inclined-and-or-non-uniform-pressure-on-shell-or-liner/365/2 "2022-03-22T02:57:21Z")

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Unfortunately, currently there is no command for an inclined and/or non-uniform pressure on shell or liner. Please instead use the FISH intrinsics:  
[struct.node.apply(STRUCT\_NODE\_PNT\<,INT\>)](http://docs.itascacg.com/flac3d700/common/sel/doc/manual/sel_manual/nodes/fish/sel.node_intrinsics/fish_sel.node.apply.html#struct.node.apply)  
[struct.node.apply.local(STRUCT\_NODE\_PNT)](http://docs.itascacg.com/flac3d700/common/sel/doc/manual/sel_manual/nodes/fish/sel.node_intrinsics/fish_sel.node.apply.local.html#struct.node.apply.local)  
and write a small FISH function to do the job.

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**Author:** ![jmbarbagelata](https://avatars.discourse-cdn.com/v4/letter/j/57b2e6/32.png) [@jmbarbagelata](https://forum.itascainternational.com/u/jmbarbagelata)\
**Post date:** [January 13, 2025, 5:05pm UTC](https://forum.itascainternational.com/t/apply-inclined-and-or-non-uniform-pressure-on-shell-or-liner/365/3 "2025-01-13T17:05:06Z")

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Dear @cheng, have you included a command to do this with a liner or is still necessary to do the FISH function? Thanks!