2004 Volume 2004 Pages 20040011
The purpose of this research is to develop a procedure of performing stress analysis on tanks composed of a few layers made of anisotropic materials considering plastic deformation, and high-pressure hydrogen tanks installed in fuel-cell vehicles. In the present report, a procedure of performing triaxial-stress analysis on tanks composed of two layers made of orthotropic elastoplastic materials was developed. The equations to calculate stresses, strains and displacements were first derived using constitutive equations, equations of force balance and boundary conditions. Then computational program was developed using the derived formulation. The validity of the derived formulation and the developed program was proved by comparing the analytical results calculated by the devloped program with the numerical ones of finite-elemet analysis.
