Based on Illiushin s two hypotheses,a new plastic constitutive equation of integral typeis proposed.The deviatoric stress induced by a strain path consists of t
In this paper.the boundary element method is anplied to investigate the internal state ofstress of autofretted tube with notch and the calculated results are im
All the stress components at a rapidly propagating crack-tip in elastic perfectly-plasticmaterial are the functions ofθonly.Making use of this condition and th
In this paper we study the stability for equilibrium points of equations in two-population dynamics.We discuss two predator-prey-patch models.Model1 is describe