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FEM Shape Function Derivation

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Old   February 3, 2007, 07:39
Default FEM Shape Function Derivation
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Jenny
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Is it possible to derive FEM shape function for arbitrary polyhedral mesh?
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Old   February 3, 2007, 09:34
Default Re: FEM Shape Function Derivation
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Jonas Holdeman
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See the book by Eugene Wachspress, "A Rational Finite Element Basis," Academic Press 1975.

I think one reason this approach never caught on is because of the difficulty of integrating over polyhedrons with more than four sides. Also, parametric mappings have proved to be more versatile. I found Wachspress' work useful in understanding why some quad mappings behave so poorly.
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