Elasticity/Hu-Washizu principle

Hu-Washizu Variational Principle

edit

In this case, the admissible states are not required to meet any of the field equations or boundary conditions.

Let   denote the set of all admissible states and let   be a functional on   defined by

 

for every  .

Then,

 

at an admissible state   if and only if   is a solution of the mixed problem.