The provided source codes and the tutorials make it easy for practicing engineers and scientists to model diffuse crack propagation in a familiar computational environment. Several examples are provided to explain the advantages and disadvantages of the method. The approach does not need predefined cracks and it can simulate curvilinear fracture paths, branching and even crack coalescence. You will also learn to use the finite element program ABAQUS to calculate the fracture mechanics parameters (J, K and CTOD). The elastic displacement and the fracture problem are decoupled and solved separately as a staggered solution. If its value reaches one the material is fully broken, thus both its stiffness and stress are reduced to zero. The phase-field is a scalar variable between 0 and 1 which connects broken and unbroken regions. The method is based on the rate-independent variational principle of diffuse fracture. 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.
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