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Thanks cbrn.The pivoting is valid for only the the element where u apply nodal constraints.Otherwise rotation is not possible.I said "simulate" free expansion i.e. keep the constraints minimum. Lastly but never the least FE methods treat thermal deformations as initial strains and the stress is...

Thanks corus. what I meant by rigid body motion is that i know I have an insufficently unconstrained model.I forgot to mention that I am using Solid45 which eliminates ROT dof. Secondly in order to simulate free expansion and as I mentioned to eliminate strutural stresses generated by fixtures I...

Hi, I am new to the forum and I have a question already.I am doing a thermal stress analysis in Ansys. I transfer the thermal loads from Ansys CFX to Ansys Multiphysics and use the Multifield tool. To reduce structural stresses I have constrained my model which by the way is huge(800000...