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Published in: Computational Mechanics 3/2019

19-02-2019 | Original Paper

Adaptive consistent element-free Galerkin method for phase-field model of brittle fracture

Authors: Yulong Shao, Qinglin Duan, Shasha Qiu

Published in: Computational Mechanics | Issue 3/2019

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Abstract

Efficient implementation of the element-free Galerkin (EFG) method for a phase-field model of linear elastic fracture mechanics is presented, in which the convenience of the meshfree method to construct high order approximation functions and to implement h-adaptivity is fully exploited. A second-order moving-least squares approximation for both displacement and phase field is employed. Domain integration of the weak forms is evaluated by the quadratically consistent 3-point integration scheme. The refinement criterion using maximum residual strain energy history is proposed and the insertion of nodes is based on the background mesh. Numerical results show that the developed method is more efficient than the standard finite element method (3-node triangle element) due to the proposed h-adaptivity. In comparison with the standard EFG method, the proposed consistent EFG method significantly improves the computational efficiency and accuracy. The advantage of the quadratic approximation is also demonstrated. In addition, the feasibility of extending the proposed method to 3D is validated by the modeling of a twisting crack.

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Metadata
Title
Adaptive consistent element-free Galerkin method for phase-field model of brittle fracture
Authors
Yulong Shao
Qinglin Duan
Shasha Qiu
Publication date
19-02-2019
Publisher
Springer Berlin Heidelberg
Published in
Computational Mechanics / Issue 3/2019
Print ISSN: 0178-7675
Electronic ISSN: 1432-0924
DOI
https://doi.org/10.1007/s00466-019-01679-2

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