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visible deformations in wrench
Posted 22 juin 2015, 18:18 UTC−4 Structural Mechanics Version 5.0 2 Replies
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Dear stuff of COMSOL,
Maybe my question will be very simple, but I can not see the deformations in wrench, if I apply different forces. I am using the file model file downloaded COMSOL webpage - wrench.mph, where I added auxiliary sweep with step of 20[N], and with range from 0 to 150[N]. So when run the compute, I don't obtain any differences of structure deformations, when the forces are different...
Unfortunately I can not attach the file, it is more than the allowed size.
Your answer will be much appreciated.
Best Regards
Ashot
Maybe my question will be very simple, but I can not see the deformations in wrench, if I apply different forces. I am using the file model file downloaded COMSOL webpage - wrench.mph, where I added auxiliary sweep with step of 20[N], and with range from 0 to 150[N]. So when run the compute, I don't obtain any differences of structure deformations, when the forces are different...
Unfortunately I can not attach the file, it is more than the allowed size.
Your answer will be much appreciated.
Best Regards
Ashot
2 Replies Last Post 23 juin 2015, 18:55 UTC−4
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Posted:
9 years ago
Hello Ashot,
In many applications, structural deformations are smaller than the human eye can detect so COMSOL scales them up so they become noticeable. The scaling factor is automatically computed to make those deformations noticeable but not overwhelming.
So when you solve the wrench model with different loads the software will depict the deformations using different scaling factors leading to the erroneous impression that those deformations are the same in all cases. The model being linear, the deformations are of course proportional to the loading. To see that on screen, set a fixed scaling factor instead of the automatic one. This is done on the "Deformation" node in your plot.
Best regards,
Jeff
PS: To reduce model size so you can post it to the Discussion Forum, you can clear the mesh and solution using the buttons for that purpose in the Mesh ribbon and Study ribbon.
In many applications, structural deformations are smaller than the human eye can detect so COMSOL scales them up so they become noticeable. The scaling factor is automatically computed to make those deformations noticeable but not overwhelming.
So when you solve the wrench model with different loads the software will depict the deformations using different scaling factors leading to the erroneous impression that those deformations are the same in all cases. The model being linear, the deformations are of course proportional to the loading. To see that on screen, set a fixed scaling factor instead of the automatic one. This is done on the "Deformation" node in your plot.
Best regards,
Jeff
PS: To reduce model size so you can post it to the Discussion Forum, you can clear the mesh and solution using the buttons for that purpose in the Mesh ribbon and Study ribbon.
Please login with a confirmed email address before reporting spam
Posted:
9 years ago
Dear Jeff Hiller,
Thanks a lot for the response, now everything works fine!
Best Regards
Ashot
Thanks a lot for the response, now everything works fine!
Best Regards
Ashot