The emerging cause of partial debonding interface was interpreted and the interaction between particles and partial debonding interfaces was accounted for determining the equivalent eigen strains by using four-phase model method.

By introducing eigensrtains in doubly periodic annular regions,the problem of doubly periodic inclusions is transformed into ones of homogeneous materials with doubly periodic eigenstrains.

This paper studies the axisymmetric deformation of a wire containing a single cylindrical inclusion with uniform axisymmetric eigenstrain.

The elastic field of the medium caused by a uniform eigenstrain in the inhomogeneity is derived.

Expression on equivalent stress and equivalent strain of wall rock state of tunnel;

Analysis on flow velocity and equivalent strain of the metal in the process of liquid extrusion;

Establishment and analysis of equivalent stress-equivalent strain curves of sheet metal

The result of the effective strain and the effective stresss in cavity die circular section is caculated by simulating the cup drawing in different states cosidering strain, stress and thickness changes.

The effect of billet size on the effective strain and unit extrusion pressure was investigated during equal channel angular pressing.

The billet flow,effective strain,extrusion stress and velocity distribution of 1100Al was investigated using finite element simulation in acute die channel angle.