Hi, I am the new one here, and recently I test a program solving elastic problem considering neumann boundary conditions. So I finish it on the basis of Step-17 by adding the neumann boundary conditions. I found that wen lame and mu are not large (i.e. equals to 1 by default), the solution seems right. But when I set the lame and mu to the parameters of stell, the solutions is always zero. Interesting, if the lame and mu are not so large, part of the solution is zero but the other part is not. Anyone know the reason?
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