# Integration of stresses over a line or surface

**URL:** <https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160>\
**Category:** Feature Requests\
**Created:** [November 9, 2024, 1:39pm UTC](https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160 "2024-11-09T13:39:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![gnikol](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/gnikol/32/3970_2.png) [@gnikol](https://prepomax.discourse.group/u/gnikol)\
**Post date:** [November 9, 2024, 1:39pm UTC](https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160/1 "2024-11-09T13:39:02Z")

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Hi,  
I wanted to suggest a feature in post-processing that would be very useful (to civil Engineers at least). It is the integration of stresses over a line or surface (or better over a set of lines or surfaces). Using this feature one can see the total forces or moments of something that has been modeled using 2d or 3d elements.

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**Author:** ![synt](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/synt/32/4658_2.png) [@synt](https://prepomax.discourse.group/u/synt)\
**Post date:** [November 9, 2024, 2:26pm UTC](https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160/2 "2024-11-09T14:26:39Z")

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CalculiX supported these feature for solid element, beam also but it’s not available for shell element.

\*edited/added  
but it could be useful when PrePoMax capable to do such as integration from stress in post-processing modes. Defining surface for any region user interest to get sectional forces, problem or limitation of composed beam and layered shell of CalculiX can be fixed or fulfiled.

 ![2024-11-09 21_22_46-](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/90346c54c385cc561208730e19fc890d181a3750.png)

 ![2024-11-09 21_23_32](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/7/795c7bad616ccd2ffad8dafff8ca5d8663584a4b.png)

 ![2024-11-09 21_23_51](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/c4bc12eae5bcb347da2b1e2807684014fbd11856.png)

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**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\
**Post date:** [November 9, 2024, 9:36pm UTC](https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160/3 "2024-11-09T21:36:18Z")

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HI Matej,

Prepomax is giving me this error WHEN i TRY TO OPEN THE RESULTS.  
It is a shell and I have edit the keywords to request the section print as usual.  
.dat file is fine and contains the correct results.

\*\*\* Warning \*\*\*  
Data failed to be parsed.  
First data line: total surface force (fx,fy,fz) and moment about the origin(mx,my,mz)

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**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\
**Post date:** [November 10, 2024, 9:50am UTC](https://prepomax.discourse.group/t/integration-of-stresses-over-a-line-or-surface/2160/4 "2024-11-10T09:50:16Z")

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Can you share the .pmx file or .dat file?