2D and 3D Abaqus implementation of a robust staggered phase-field solution for modeling brittle fracture

摘要

In order to model brittle fracture, we have implemented a two and three dimensional phase-field method in the commercial finite element code Abaqus/Standard. The method is based on the rate-independent variational principle of diffuse fracture. The phase-field is a scalar variable between 0 and 1 which connects broken and unbroken regions. If its value reaches one the material is fully broken, thus both its stiffness and stress are reduced to. zero. The elastic displacement and the fracture problem are decoupled and solved separately as a staggered solution.