Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
structural mechanics and thermal expansion
Posted 28.06.2016, 14:39 GMT-4 1 Reply
Please login with a confirmed email address before reporting spam
Hi
here i was trying to find the thermal expansion of a mirror ( steel ). I was able to apply the physics, structural mechanics and in that linear elastic property i added thermal expansion and applied a temperature difference of 10 deg C. The output values are same as expected but am facing a problem of displacement of whole my object . I placed the mirror to be free floating and by theory it should expand in all direction equally but in my model i noticed that my whole image have shifted in some axis , i guess its because of the change in center. how can i correct it ? ,so that it expands uni-formally in all axis same . i have attached jpegs of my results and please help me to correct my result.
thanks
here i was trying to find the thermal expansion of a mirror ( steel ). I was able to apply the physics, structural mechanics and in that linear elastic property i added thermal expansion and applied a temperature difference of 10 deg C. The output values are same as expected but am facing a problem of displacement of whole my object . I placed the mirror to be free floating and by theory it should expand in all direction equally but in my model i noticed that my whole image have shifted in some axis , i guess its because of the change in center. how can i correct it ? ,so that it expands uni-formally in all axis same . i have attached jpegs of my results and please help me to correct my result.
thanks
Attachments:
1 Reply Last Post 28.06.2016, 16:27 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
8 years ago
Hello Melvin,
See for instance www.comsol.com/community/forums/general/thread/95201/ . This topic has been discussed many times in the Discussion Forum. You need to impose sufficient constraints to remove all 6 rigid body motions, namely 3 rotations and 3 translations.
Best,
Jeff
See for instance www.comsol.com/community/forums/general/thread/95201/ . This topic has been discussed many times in the Discussion Forum. You need to impose sufficient constraints to remove all 6 rigid body motions, namely 3 rotations and 3 translations.
Best,
Jeff