Due to extremely high processing time (may reach 16 hours!) on a powerful PC (32 GB RAM/ i7) spent to solve a Transient Structural Analysis using ANSYS Workbench 15, I tried to switch a flexible body into a rigid body.
I couldn't solve the model due to a set of errors in model, where contact between a flexible body and a rigid body got undefined, and symmetry selection for the rigid couldn't be selected anymore.
Any help will be highly appreciated!
Dear Youssef
I could not understand your problem completely, but if you do not spend too much time on project, it will be a good suggestion that switch to explicit method by using ANSYS Lsdyna or ANSYS Autodyne.These software are special for impact issues.
Hello Ghaznavi
Thanks for checking my question. I have been working on this study for more than a year. My target is to compute the reaction forces (resistance) due to rolling of a rubber sheet over a steel cylindrical body. The contact takes very small time where the indented region travels as the rubber sheet moves horizontally, that is why I chose transient structural study.
The problem really is that I can't change a flexible body into a rigid one. Whenever I try to do so, I can't define contact and symmetry conditions.
Dear Youssef
You're welcome. I think you can increase the modulus of elasticity substantially instead of change the material type as a rigid. (for example E = 200e18 instead of 200e9 for steel). of course solving the problem with rigid material would reduce calculation time, but if you can not do that (because of some software limitation), you can use this trick. Be sure the result would be the same! I hope you're doing well and
I hope it proves helpful!
Dear Youssef,
If you intend to use a rigid body in your analysis, you should use joints instead of contacts (te define connections with the rigid body). For example instead of Fixed Support - you should use a fixed Body-Ground Joint, or in your case, a revolute/cilindrical joint and then impose Joint Load. This way you can constrain your rigid body.
Now...I don't know for sure if ANSYS 15 allows you to do so. In more recent versions, it works fine (only the face/faces of the rigid body in contact with a flexible body is being meshed).
I hope that helps!
can you guys please explain why rigid body doesn't take the regular constraints like fixed supports?
- Badges
- Science topic