kl wherecijklandsijklare the stiffness and compliance tensor respectively; both containing material elastic constants linear elastic strain in terms of displacement is given by: ε ij = 1 2 ∂ u i ∂ x j + ∂ u j ∂ x i the general equation of motion without considering body ...
However, the functional in Equation (9) involves a Euler–Lagrange equation more complicated with respect to the functional (6) one. Therefore, to proceed, we consider the functional in the previous form (6). Given an integrand function for a functional of form F ( x , y , f ( x , ...