A remark about some unreasoning things of Oden's constitutive variationalprinciple described in Ref. [1] is given in this paper. According to Oden's idea, the other two constitutive variational principles, which are complementary to one another, are developed. An example is performed to demonstrate the application of the constitutive variational principles.
Oden,J.T.,The classical variational principles of mechanics. Energy Methods in Finite Element Analysis,Ed.by R.Glowinski et al.,John Wiley and Sons Ltd(1979).
[2]
Oden,J.T.and J.N. Reddy.Variational Methods in Theoretical Mechanics,2nd ed.,Spring-Veriag,Berlin Springer(1983).