# Elasto-plastic bending - elements, accuracy

**URL:** <https://calculix.discourse.group/t/elasto-plastic-bending-elements-accuracy/700>\
**Category:** Uncategorized\
**Created:** [August 30, 2021, 1:15pm UTC](https://calculix.discourse.group/t/elasto-plastic-bending-elements-accuracy/700 "2021-08-30T13:15:22Z")\
**Posts on this page:** 1\
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**Author:** ![dichtstoff](https://avatars.discourse-cdn.com/v4/letter/d/dec6dc/32.png) [@dichtstoff](https://calculix.discourse.group/u/dichtstoff)\
**Post date:** [August 30, 2021, 3:27pm UTC](https://calculix.discourse.group/t/elasto-plastic-bending-elements-accuracy/700/2 "2021-08-30T15:27:40Z")

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you can try Incompatible mode brick elements.  
here is a good resources of examples:

> **[GitHub - calculix/CalculiX-Examples: CalculiX examples by Prof. Martin Kraska from...](https://github.com/calculix/CalculiX-Examples)**
>
> CalculiX examples by Prof. Martin Kraska from Brandenburg University of Applied Sciences. Excellent starting point to master parametric modelling with CGX and CCX.

with these example:

> **[CalculiX-Examples/NonLinear/Sections/Plastic at master ·...](https://github.com/calculix/CalculiX-Examples/tree/master/NonLinear/Sections/Plastic)**
>
> CalculiX examples by Prof. Martin Kraska from Brandenburg University of Applied Sciences. Excellent starting point to master parametric modelling with CGX and CCX. - calculix/CalculiX-Examples

I thought we had the same issue before, but i don’t find any the topic.  
I had the same problem, and the solution was to change to these kind of elements!?

Please let me know, if you find a solution according to you hand calc…  
Can you post your analytical solution? These would be very helpful for me.

(tip: I would always use a displacement for these king of calc. first and  
check the force with the boundary reaction)

> [@Capacity of beam calculation](https://calculix.discourse.group/t/capacity-of-beam-calculation/387/9):
>
> i took a simple test case quickly, for beam element it can detect torsional buckling conditions also as shown in results. \*\*edited compares to solid & shell element (quadratic), and refined mesh of beam element with B32 (without reduced integration). all yields nearly the same results.

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