Crushable foam material in optistruct
Altair EmployeeHi,
I am trying to model expanded polypropylene material and i am trying to figure out what material Id and property type we must use in optistruct.
Thanks
Answers
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Hi Adithya,
What is the analysis about?
You can use MATX33, MATX70
Or use RADIOSS with LAW33, LAW 70
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Hi, Thank you for your response.
It is a non linear quasi static analysis on the seat. I am using EPP material for the foam.
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I need to further optimize the design, thats why i am modelling it with optistruct, right now, I tried converting from optistruct to radioss but i am missing 1d elements which were placed on the components. I am using the latest version of 2017.2
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Hi @Adithya
What type of Optimization are you planning to do?
RADIOSS does supports optimization starting from 2017. Please refer to this example problem of thickness optimization on a B-pillar
RD-E: 5100 Optimization in RADIOSS for B-Pillar (Thickness optimization)
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Hi,
Its a composite material, and i would need to perform and try all the 3steps available in optistruct. Btw my analysis is taking very long time to run, this has been the case ever since i gave tie connection between a solid element and shell element, is there a more less time consuming way to solve this? because before having the solid elements and connections, it took lesser time to compute, will a 1D connection with rigid element solve the issue? Also i am not facing any issues in optistruct with the file, I am using NLGEOM as i have a foam material.
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- I tried with 1d connections as well, it doesnt seem to work. For nlstat the same amount of element and connections, the results are getting computed faster, i think it has to do with something in Nlelast type.
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Hi @Adithya
Is it possible to share the model file, please?
Please use the file transfer link in my signature to share the model file
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Hi, I have attached the file in the file transfer link
Thank you.
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Hmm, that is strange. I have sent you the file again. Please check
Thank you.
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Hi no, I am running a nonlinear geometric analysis.
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Hi @Adithya
OK, It is NLGEOM and I am running the file right now.
One way to increase the speed of the analysis is to use a coarser mesh instead of a finer mesh.
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Hi Prakash
Oh great, Is it taking too long or did you get any results?
Thank you.
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