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It looks like this is a very challenging question. Does anyone know the answer?

Dear all, I found a problem when apply the torque/twisting moment rigid body. The shape inflate and deflate in size in the animation. The results seem reliable. I did a search, and it looks the reason for these kind of problems are still unknown. Please help me out. see the similar problem...

Hi all, I learned a clever way to apply a moment (pure rotation) for a cylinder meshed by Solid187. However, there is one thing I do not understand. It seems this way will squeeze the cylinder fist then recovered judged by the animation (please watch the video). My have some questions 1)...

Hi all, I am still waiting. I hope anyone who has experience to reply. Thanks. Steve

Sorry, Drej, The link to my above attachment did not work. I reattached it. Look forward to hearing from you. Steve http://files.engineering.com/getfile.aspx?folder=ceed8bf6-bab9-4f6c-875a-ecd4f6f56609&file=helical_spring.jpg

Hi Drej, I reply this post just try to find you (Drej). I found you replied and provided a very useful macro to make a helical spring. It is very impressive (thread569-124712, macro(2)). I do have a few question to ask you. 1) how to put a non-coil end at each end (see the attachment)? It...

Hi all, I have a strange problem. I can not modify the material's Engineering Data in Workbench (Ansys 13). Does anybody know what the reason is? Thanks. Steve

Also, I would like to ask how to get the circumferential strain on the turn (inner and outer) surfaces. p.s. The image was imported from Autodesk Inventor to the Ansys workbench. I still did not manage to complete in Ansys. Thanks...

Hi all, I found there was a thread 569-124712 discussed the spring. There is a link http://ansys.net/ansys/input/spring.inp , in which more complex spring was constructed. But I found the macro file provided by the link (http://ansys.net/ansys/input/spring.inp) did not work in Ansys 13...