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- W3025572568 endingPage "104007" @default.
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- W3025572568 abstract "When subjected to some anti-plane shear mode III loading, segmentation of the crack front frequently occurs during propagation: even if the crack is initially planar, propagation produces facets/segments rotated toward the shear free direction. These facets induce some modifications in the local loading of the crack tips that can be captured through the multi-scale cohesive zone model proposed by Leblond et al., 2015. Assuming that the width of the facets is small in comparison to their length, the facets can be considered at the microscale, as a bidimensional periodic array of tilted cracks perpendicularly to the direction of propagation, and at the macroscale, as a growing Cohesive Zone. The model was developed initially supposing a constant period, small tilt angles and non-overlapping facets. The first aim of this paper is to relax these assumptions to deal with more realistic cases. For this, the microscale problem is solved using XFEM and the outputs are further incorporated into the model to get some results on the macroscale, in particular the effective fracture energy. The second objective is to introduce some experiments to show the relevance of the assumptions made and to demonstrate the ability of the approach (i) to determine the inclination of the facets and (ii) to quantify, in both fatigue and brittle fracture, the toughening due to the decrease of the crack opening driven by the unbroken ligaments between the facets." @default.
- W3025572568 created "2020-05-21" @default.
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- W3025572568 date "2020-08-01" @default.
- W3025572568 modified "2023-10-14" @default.
- W3025572568 title "Mode I+III multiscale cohesive zone model with facet coarsening and overlap: Solutions and applications to facet orientation and toughening" @default.
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- W3025572568 doi "https://doi.org/10.1016/j.jmps.2020.104007" @default.
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