This model enables rapid approximate computation of the crack surface displacement and the crack front plastic zone size in the three-dimensional crack.

Using the Green’s functions,the extended general displacement solutions of three-dimensional crack problem in electro-magneto-thermo-elastic multiphase composites under extended loads are analyzed by boundary element method.

3-D cracked J-integral formulas was transformed and treated by coordinate transformations,finite element and Gauss integral.

3-D crack of a compact tension(CT) specimen with concrete size is also analyzed.

We discuss the 3D cracks around cold-expanded holes and simulate their interference prestress release using the engineering software of ANSYS to study the effect of the interference prestress release on stress intensity factors(SIFs) at crack tips.

A series of uniaxial compressive tests on the frozen PMMA with pre-existing 3D cracks were performed in laboratory to investigate the mechanisms of crack propagation and coalescence in brittle materials.

Modeling of 3D cracks in the specified block has been done with ANSYS.

Research on 3D fracture predication and permeability modeling;