A moving cohesive interface model for fracture in creeping materials

摘要

We Present a new cohesive interface model for quasi-static creep crack growth that is implemented within a moving-grid finite element model. A pseudo crack tip separates the cohesive process zone from the free surfaces of the crack the moving-grid formulation models con- tinuous crack advance by describing relative motion between the pseudo crack-tip and the material. This eliminates the need for extensive mesh refinement away from the current crack-tip location and supports both transient and direct steady-state solutions.