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Posted 17 Oct 2019, 11:27 BST Mechanical Version 5.4 1 Reply
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I'm trying to model a shell with a thin film on top, modelled with another shell. In the geometry, I just have one surface, which I use in two shell-physics. In order to couple the physics I thought the following prescribed displacement in the bottom shell would be sufficient:
where H1 and H2 are the thickness of the bottom and top shell, respectively.
However, this does not seem to give the correct result. Furthermore, when I modify the offset of either of the shells, the results change. I don't see how the offset would couple into this coupling, are u1,v1,w1 not evaluated in the midsurface? How should I modify these equation to make the correct coupling, indepedent of the offset?