In continuum mechanics, and in particular in finite element analysis, the Hu-Washizu principle is a variational principle which says that the action
is stationary, where is the elastic stiffness tensor. The Hu-Washizu principle is used to develop mixed finite element methods. The principle is named after Hu Haichang and K. Washizu.
- K. Washizu: Variational Methods in Elasticity & Plasticity, Pergamon Press, New York, 3rd edition (1982)
- O. C. Zienkiewicz, R. L. Taylor, J. Z. Zhu : The Finite Element Method: Its Basis and Fundamentals, Butterworth-Heinemann, (2005).