May 5, 2021 at 7:25 pmgoktug.yilmazSubscriber
I am trying to perform a quasi static analysis of an aluminium profile, but my results are not realistic. A bucling occurs, and I can not understand the reason behind it.
Here is my result;May 6, 2021 at 6:56 amRam GopisettiAnsys EmployeeI hope i have answered this kind of query a long ago and i would like to point to the same.
for proven stability, you can switch the section solid to have 27 node solid element and make sure you are lording vis displacement on the top. I am sure you might be getting the following result. Moreover, you can also try constraining the solid to have only y-free. Since you need it in quasi static, make sure you evoke Implicit cards in the given .k file.
Comment down your response for further help. Cheers, Ram
May 8, 2021 at 6:39 amgoktug.yilmazSubscriberthank you very much for your help. I get stuck with this problem. Whatever I did does not work. I also have tried to look at the file you sent, but an error occured. I have added the same controls that you used, but after running until about %3, it has been terminated. Here is the .txt file for my last analysis.
And here is the content of my file if you are not allowed to download.
Tripe-Chamber Crushbox meshed by AMEEN TOPA
1Displacement of plate
May 8, 2021 at 7:01 amgoktug.yilmazSubscriberI also opened your file and import my models in it to use the exact same settings with you. However, my rigid plate just don't move during analysis. It is waiting at the same position. I really don't know why.
May 8, 2021 at 1:25 pmgoktug.yilmazSubscriberI have worked a bit more on the analysis. I have used the same settings with yours. Actually, I have opened your file, deleted your models and imported mine. I haven't changed the material. The only difference is that I have removed your segment entities which you use to define contacts. I have defined masters and slaves as parts. As I said before, This is the only difference. Here is my resul;
Could you help me improve my result? I have also tried to use 27 node solid elements, but it has given an error.
May 10, 2021 at 10:28 amRam GopisettiAnsys EmployeeThe keyword I gave you is in the explicit domain, based on your initial data you are proceeding in the implicit domain. Anyways, you can check the following link for setting up the model as per standard.
you can change the section to be shell rather than solid and compare them with the experiment .
May 10, 2021 at 10:29 amRam GopisettiAnsys EmployeeMoreover, check this thesis for further help.
May 13, 2021 at 6:14 amgoktug.yilmazSubscriberThank you very much for your answer. I am trying to do an explicit analysis now, to obtain similar results to your simulation. I am also using the same material with you. Now, I have done the simulation again by making contact definitions the same with yours by creating segment entities as you can see below.
However, the result is still inaccurate. I will also try to model this geometry in Ls-Dyna and perform the analysis by using shell section.
Thank you for your help and sources you have shared with me.
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