Using Beltrami-Schaefer stress function in the theory of elasticity in this paper,we derive the stress functions of torsion,plane problem,axisymmetric deformati
It is of great practical importance to analyze the shakedown of shell structures undercyclic loading,especially of those made of strain hardening matericls.In t
Under the condition that any perfectly plastic stress components at a crack tip are nothing but the functions ofθonly,making use of equilibrium equations,Hill