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  1. rrbolin1982

    Negative Pivot Ratios and Matrix Diagonals

    Good Morning, I have a model in Femap being solved with NX Nastran. It is a combination of 10-noded tets, shells, and bars, however there is not any sharing of nodes between the solid and non-solid elements. I am getting fatal pivot ratio errors and the error messages and ratios are below. I...

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