Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 312, Issue -, Pages 351-373Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2016.02.017
Keywords
Brittle fracture; Ductile fracture; Phase-field modeling; Solid shells; Isogeometric analysis; Assumed natural strains
Funding
- European Research Council, ERC Starting Researcher Grant INTERFACES [279439]
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In this paper, we investigate fracture in shells with a phase-field modeling approach. The shell model is based on solid-shell kinematics with small rotations and displacements and is discretized using quadratic Non-Uniform Rational B-Spline basis functions. Membrane and shear locking is alleviated through the Assumed Natural Strain approach. The solid-shell formulation is combined with a brittle phase-field model for elastic materials, as well as with a ductile fracture model for elasto-plastic materials exhibiting J(2) plasticity with isotropic hardening. Several examples demonstrate the ability of the proposed framework to capture crack initiation, propagation, merging and branching phenomena as well as crack bulging effects in shells under different states of loading. (C) 2016 Elsevier B.V. All rights reserved.
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