here with cleared mesh.
My part is to big for uploading, so i have to delete it.
in the last file i deleted by mistake the nonlinear material.
i will try the nonlinear example now.
Non Linear Material
Moderator: bernd
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Re: Non Linear Material
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- upload.FCStd
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Re: Non Linear Material
I can not see anything wrong. If you need more than 2 yielding points than yes you need to edit the input file.
But before editing the input file add add dozens of yield points I would make sure it works with the twe yield points you can edit in the gui. If yout get som PEEQ with two yield points I would start to add them by editing the input file.
cheers bernd
Re: Non Linear Material
I tried two points and it works.
Now a simulaton with more points is running.
Maybe it's because of the decrease of the curve, under nonlinear material FreeCAD says "simple hardening".
I will slowly increase the number of points.
The picture shows the curve of plasticstrain i would like to use.
i will give later an update
Thanks for your help
Greetings Nic
Now a simulaton with more points is running.
Maybe it's because of the decrease of the curve, under nonlinear material FreeCAD says "simple hardening".
I will slowly increase the number of points.
The picture shows the curve of plasticstrain i would like to use.
i will give later an update
Thanks for your help
Greetings Nic
- Attachments
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- stress-strain-plastic.PNG (5.87 KiB) Viewed 1507 times
Re: Non Linear Material
Here my Example with :
*MATERIAL, NAME=MaterialSolid
*ELASTIC
2380, 0.360
*PLASTIC
19.10, 0.0
20.8, 0.00175
25.7, 0.00498
30.36123, 0.00747
34.3069, 0.0184
The investigated material is PLA btw.
*MATERIAL, NAME=MaterialSolid
*ELASTIC
2380, 0.360
*PLASTIC
19.10, 0.0
20.8, 0.00175
25.7, 0.00498
30.36123, 0.00747
34.3069, 0.0184
The investigated material is PLA btw.
- Attachments
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- vmis.PNG (250.8 KiB) Viewed 1497 times
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- PEEQ.PNG (135.54 KiB) Viewed 1497 times
Re: Non Linear Material
looks great
You may read the Calculix manual in detail ... http://www.dhondt.de/ccx_2.17.pdf section 6.8 Materials from page 246 to 266. On page 251 it says ...
You may read the Calculix manual in detail ... http://www.dhondt.de/ccx_2.17.pdf section 6.8 Materials from page 246 to 266. On page 251 it says ...
This would proof your assumption. But I am not 100 % if this text really is for the Calculix keyword "*Plasticity"Deformation plasticity is characterized by a one-to-one (bijective) relationshipbetween the strain and the stress. This relationship is a three-dimensionalgeneralization of the one-dimensional Ramberg-Osgood law frequently used formetallic materials (e.g. in the simple tension test) yielding a monotonic increasing function of the stress as a function of the strain. Therefore, deformationplasticity is very well suited to model the relation between the Cauchy (true)stress and the strain.
Re: Non Linear Material
Thank you for the good help.
Re: Non Linear Material
Hello Klemmkeil
here some information's for non linear plastic material datas
https://forum.freecadweb.org/viewtopic. ... 40#p444477
Greetings
Nanayaw
here some information's for non linear plastic material datas
https://forum.freecadweb.org/viewtopic. ... 40#p444477
Greetings
Nanayaw
Re: Non Linear Material
Sorry
if you search at aFEM forum for
FEM Plastic Materialdata Stress and Strain
then you will get
greetings
Nanayaw
if you search at aFEM forum for
FEM Plastic Materialdata Stress and Strain
then you will get
greetings
Nanayaw