# CAX8 strange result from \*Node Print card

**URL:** <https://calculix.discourse.group/t/cax8-strange-result-from-node-print-card/2636>\
**Category:** Uncategorized\
**Created:** [March 17, 2025, 6:28am UTC](https://calculix.discourse.group/t/cax8-strange-result-from-node-print-card/2636 "2025-03-17T06:28:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fgr](https://avatars.discourse-cdn.com/v4/letter/f/f4b2a3/32.png) [@fgr](https://calculix.discourse.group/u/fgr)\
**Post date:** [March 17, 2025, 6:28am UTC](https://calculix.discourse.group/t/cax8-strange-result-from-node-print-card/2636/1 "2025-03-17T06:28:47Z")

</div>

I have defined a small test shaft with a single CAX8 element. It has a diameter of 2mm and a length of 10mm. When I stretch the shaft 0.01mm in axial direction the analytic force will be 659.7N  
Summarize node forces in axial direction seems to would converge against analytic in case of more element, but output from the \*Node Print card seem in my mindset to be completely nonsenses.

Could this be a bug or do I have a lack knowledge with ccx ?

```auto
**
*Node
1, 1.0, 0.0
2, 1.0, 10.0
3, 0.0, 10.0
4, 0.0, 0.0
5, 1.0, 5.0
6, 0.5, 10.0
7, 0.0, 5.0
8, 0.5, 0.0
**
*Element, Type=CAX8, Elset=axisym
1, 1, 2, 3, 4, 5, 6, 7, 8
**
*Nset, Nset=Nfix
4, 8, 1
*Nset, Nset=MovA
3, 6, 2
**
*Material, Name=EL
*Elastic
210000, 0.3
**
*Solid section, Elset=axisym, Material=EL
**
*Step, Nlgeom
*Static
**
*Boundary, op=New
*Boundary
Nfix, 2, 2, 0
MovA, 2, 2, 0.01
**
*Node print, Nset=MovA, Totals=Only, Global=Yes
RF, U
*Node file
RF, U
*El file
S, E
**
*End step

```

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<div class="post-metadata">

**Author:** ![JuanP74](https://avatars.discourse-cdn.com/v4/letter/j/b5a626/32.png) [@JuanP74](https://calculix.discourse.group/u/JuanP74)\
**Post date:** [March 17, 2025, 7:33am UTC](https://calculix.discourse.group/t/cax8-strange-result-from-node-print-card/2636/2 "2025-03-17T07:33:42Z")

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this is the result for a 2º slice, if you multiply by 180 to account for the whole section you get 180x3.665=659.7  
Check 6.2.30 in the manual

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<div class="post-metadata">

**Author:** ![fgr](https://avatars.discourse-cdn.com/v4/letter/f/f4b2a3/32.png) [@fgr](https://calculix.discourse.group/u/fgr)\
**Post date:** [March 17, 2025, 12:44pm UTC](https://calculix.discourse.group/t/cax8-strange-result-from-node-print-card/2636/3 "2025-03-17T12:44:46Z")

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Thanks , so it wasn’t a bug but a lack of knowledge in ccx from my side 🙂