ON VARIOUS VARIATIONAL PRINCIPLES IN NONLINEAR THEORY OF ELASTICITY

In the present paper functionals for the various possiblemain variational principles in the nonlinear theory of e-lasticity are derived from the“full energy principle” andseveral of them are not found yet in the literatures avail-able. Through the derivation of this paper we suggest aconjecture on the nonexistence of the eleventh and thesixth classes for the variational principles in Table 6.1of H. C. Hu’s monograph 1].