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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/25579

Title: Modeling and simulation of quasi-brittle failure with continuous anisotropic stress-based gradient-enhanced damage models
Authors: Vandoren, Bram
Simone, Angelo
Issue Date: 2018
Citation: Computer methods in applied mechanics and engineering, 332, p. 644-685
Status: In Press
Abstract: Two anisotropic stress-based gradient-enhanced damage models are proposed to address the issue of spurious damage growth typical of continuous standard gradient-enhanced damage models. Both models are based on a decreasing interaction length upon decreasing stresses and do not require additional model parameters or extra degrees of freedom when compared to standard gradient-enhanced models. It is observed that with the proposed models damage spreading is significantly reduced due to the occurrence of non-physical oscillations in the nonlocal strain field near the strain localization band. Model improvementsto eliminate these strain oscillations upon vanishing length scale values are proposed. The capability of the models and their patched versions to correctly simulate damage initiation and propagation is investigated by means of mode-I failure, shear band and four-point bending tests.
URI: http://hdl.handle.net/1942/25579
DOI: 10.1016/j.cma.2017.12.027
ISSN: 0045-7825
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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