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COMPUTATIONAL MODELING OF DAMAGE BASED ON MICROCRACK KINKING

Abstract : The paper presents numerical results for a two-scale damage model accounting for mixed-mode propagation of micro-cracks. A time-dependent propagation criterion is assumed for microcrack growth and a kinking direction criterion based on the maximum of the energy-release rate is used. The macroscopic damage evolution laws are obtained by homogenization based on asymptotic developments. A numerical procedure based on finite elements is developed for the two-scale model and simulations illustrating the structural response are presented. A priori microscopic computations increase the efficiency of the computational model at the scale of macroscopic structures. The resulting homogenized behavior involves softening and localization of damage. Direct links between macroscopic damage evolution and microscopic propagation of micro-cracks are established within the two-scale model.
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https://hal.univ-lorraine.fr/hal-01514144
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Submitted on : Tuesday, April 25, 2017 - 5:22:08 PM
Last modification on : Friday, February 26, 2021 - 2:48:02 PM

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A. M. Dobrovat, Cristian. F. Dascalu, S. Hall. COMPUTATIONAL MODELING OF DAMAGE BASED ON MICROCRACK KINKING. International Journal for Multiscale Computational Engineering, Begell House, 2015, 13 (3), pp.201-217. ⟨10.1615/IntJMultCompEng.2015011883⟩. ⟨hal-01514144⟩

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