Gradient damage modeling of brittle fracture in an explicit dynamics context

Abstract : In this contribution we propose a dynamic gradient damage model as a phase-field approach for studying brutal fracture phenomena in quasi-brittle materials under impact-type loading conditions. Several existing approaches to account for the tension-compression asymmetry of fracture behavior of materials are reviewed. A better understanding of these models is provided through a uniaxial traction experiment. We then give an efficient numerical implementation of the model in an explicit dynamics context. Simulations results obtained with parallel computing are discussed both from a computational and physical point of view. Different damage constitutive laws and tension-compression asymmetry formulations are compared with respect to their aptitude to approximate brittle fracture.
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Submitted on : Tuesday, December 29, 2015 - 9:50:11 PM
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Tianyi Li, Jean-Jacques Marigo, Daniel Guilbaud, Serguei Potapov. Gradient damage modeling of brittle fracture in an explicit dynamics context. International Journal for Numerical Methods in Engineering, Wiley, 2016, ⟨10.1002/nme.5262⟩. ⟨hal-01248263⟩

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