We present a comparison between a global energy approach à la Griffith and a regularized model named graded damage for the simulation of brittle and quasi-brittle fracture. In the Griffith-like approach the crack propagation criterion stems from stationarity of the total free energy resulting from the sum of the bulk elastic energy and the surface energy required for crack advancement. On the other side, in graded damage the material degradation takes place in layers of finite thickness where the transition between the sound material and the completely damaged one occurs. A numerical example that refers to a typical benchmark problem is presented that allows showing the features of the two approaches and their ability to reproduce experimental results as well.
Comparison between a direct and a regularized method for brittle crack path modeling
Nunziante ValorosoConceptualization
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2024-01-01
Abstract
We present a comparison between a global energy approach à la Griffith and a regularized model named graded damage for the simulation of brittle and quasi-brittle fracture. In the Griffith-like approach the crack propagation criterion stems from stationarity of the total free energy resulting from the sum of the bulk elastic energy and the surface energy required for crack advancement. On the other side, in graded damage the material degradation takes place in layers of finite thickness where the transition between the sound material and the completely damaged one occurs. A numerical example that refers to a typical benchmark problem is presented that allows showing the features of the two approaches and their ability to reproduce experimental results as well.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.