Hu Washizu principle

Hu Washizu principle

In continuum mechanics, and in particular in finite element analysis, the Hu-Washizu principle is a variational principle which says that the action

:int_{V^e} left [ frac{1}{2} epsilon^T C epsilon - sigma^T epsilon + sigma^T (DU) - ar{p}^T u ight] dV - int_{S_sigma^e} ar{T}^T u dS

is stationary, where C is the right Cauchy-Green deformation tensor. The Hu-Washizu principle is used to develop mixed finite element methods.

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