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Thank you cbrn and gfbotha, I have tried different elastic modulus values (within the range of viscoelastic material) and it shows the difference which is smaller URES (displacement) result. However, the result seems to be still far from reality. So I really don't know if I should proceed with...

Ok, so you meant that I should run the model with non-linear study? And whatever results that I got with linear study are completely wrong???

Hi, I am using CosmosWorks 2007 SP1 without non-linear study. I would like to know if my model has certain parts whose material is viscoelastic, can I analyse it with linear study? Thank you. Regards.

Thanks, cbrn! 1) So you meant because I run the model in linear range that could cause the problem? But I did try to activate the large displacement flag to enable non-linear analysis, the analysis fails at about 28%. I save the result up to that point but the result image I get is not much...

Hi, I have a question. There are 2 metal parts in my model separated by a layer of elastic. Even thought I set "no penetration" (surface to surface) between each surface of the metal parts with each surface at both sides of the elastic part, and also between the two surfaces of the metal parts...

Thanks cbrn, You said "cheat" with the initial positions of the components in order not to have any "initially-open" contact, did you mean that I should change the geometry of the components to make sure there is no gap in between or I can just simply change in "Contacts/Gaps"? And if so, how...

I have found solutions for most of the problems I face, but there is one which I am still stuck with. I have this warning at the end of the analysis. "Load/Restraint produce large displacement. Would you like to stop the program and rerun with large displacement flag activated? Yes/No". How can...

I am modeling it with solids only. But I still face this problem. Is it because i have gaps between parts that might cause the problem?

Thank you Corus and 2design for your help. But if I expect my model to behave within linear range, I should not activate the large displacement flag, should I? As COSMOS would automatically run it in non-linear, is that right? I have also encountered a problem with "No penetration" in boundary...

Hi, I am a newbie in COSMOS. I am working within linear range, but sometimes I have the message saying turn on the large displacement flag at the end of the run. What should I do to solve this problem if I dont want to move to non-linear analysis? Another message says "Equilibrium satisfaction...