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Electric Displacement Field due to mechanical stress after cooldown
Posted 31 janv. 2014, 02:36 UTC−5 Geometry, Mesh, Studies & Solvers, Structural Mechanics Version 4.3a, Version 4.4 0 Replies
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I have a problem with a 3D simulation for my Ph.D. thesis. Therefore I would be very grateful if anyone could help me.
My model consists of a piezoelectric substrate, two insulating layers and some metallizations on top. To reduce the number of degrees of freedom and because of a double symmetry I only look at a quarter of the model, just to prevent running out of memory. The simulations will help me to understand the results of our fully measured sample, where we expect mechanical stress imposed by the top metallization to lead to an electric field as a result of the piezoelectric effect. There are three Thermal Expansion nodes to incorporate the three changes in temperature while sample fabrication and our measurement at 1K.
But every time the solver stops with:
Failed to find a solution.
The relative error (...) is greater than the relative tolerance.
Returned solution is not converged.
No matter what I'm trying, it's always the same error.
Could anyone please have a look to my mph-file and maybe give a solution statement?
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Hello Andre Müller
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