A Mystran writer error when using 1d element

[bernd]

fyi:

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>>> 
>>> import math
>>> math.pi
3.141592653589793
>>> 

[bernd]

https://github.com/berndhahnebach/FreeC ... 2c5982a72c

just made it pep8 compatible ... no tests yet

[bernd]

FreeCAD FEM 3D truss from solver calculix and z88, see examples gui ... 8145 Meter is surely wrong ...

John have you tested your circular as well?

3D_truss_mystran.FCStd

(61.44 KiB) Downloaded 66 times

[bernd]

if a rectangular section 222x22 mm is used I get reasonable results ... of 8.1 mm maximal deflection

[johnwang]

PBARL maybe working without the continuation mark.

[johnwang]

8145 Meter is surely wrong ...

I got the same result.
The Young's Modulus is 200GPa, but the output is small.

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MAT1           1 200000.              .3

change to 200.+09 will gives the right result.

3dT0.jpg (33.67 KiB) Viewed 1707 times

Mesh.dat.txt

(27.88 KiB) Downloaded 46 times

[johnwang]

Added more elements. The middle part seems not moving.

3dT5.jpg (35.18 KiB) Viewed 1662 times

3dT3.jpg (13.54 KiB) Viewed 1662 times

[bernd]

attached with rectangle section. everything seams correct. It can be seen we did not define hinges ... one of the things to do after the sections work correct ...

3D_truss_mystran_rectangle_section.FCStd

(73.64 KiB) Downloaded 51 times

Screenshot_20210918_132453.png (132.71 KiB) Viewed 1641 times

[bernd]

we should get this with the circular as well, but something goes wrong with them ...

[johnwang]

we should get this with the circular as well, but something goes wrong with them ...

You need use m for mesh, not mm.