Hi Adithya,

What is the analysis about?

You can use MATX33, MATX70 

Or use RADIOSS with LAW33, LAW 70

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.

Hi @Adithya

I suggest you use RADIOSS for such a problem.

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

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)

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.

• 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.

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
 

Hi, I have attached the file in the file transfer link

Thank you.

Hi @Adithya

I didn't receive any file at my end. 

Hmm, that is strange. I have sent you the file again. Please check

Thank you.

@Adithya

I got the files. thank you

I see that you are running a linear static analysis.

Hi no, I am running a nonlinear geometric analysis.

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. 

Hi Prakash

Oh great, Is it taking too long or did you get any results?

Thank you.