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Three-dimensional brittle fracture : configurational-force-driven crack propagation
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Kaczmarczyk, Łukasz, Nezhad, Mohaddeseh Mousavi and Pearce, Chris (2014) Three-dimensional brittle fracture : configurational-force-driven crack propagation. International Journal for Numerical Methods in Engineering, 97 (7). pp. 531-550. doi:10.1002/nme.4603 ISSN 0029-5981.
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Official URL: http://dx.doi.org/10.1002/nme.4603
Abstract
This paper presents a computational framework for quasi‐static brittle fracture in three‐dimensional solids. The paper sets out the theoretical basis for determining the initiation and direction of propagating cracks based on the concept of configurational mechanics, consistent with Griffith's theory. Resolution of the propagating crack by the FEM is achieved by restricting cracks to element faces and adapting the mesh to align it with the predicted crack direction. A local mesh improvement procedure is developed to maximise mesh quality in order to improve both accuracy and solution robustness and to remove the influence of the initial mesh on the direction of propagating cracks. An arc‐length control technique is derived to enable the dissipative load path to be traced. A hierarchical hp‐refinement strategy is implemented in order to improve both the approximation of displacements and crack geometry. The performance of this modelling approach is demonstrated on two numerical examples that qualitatively illustrate its ability to predict complex crack paths. All problems are three‐dimensional, including a torsion problem that results in the accurate prediction of a doubly‐curved crack. Copyright © 2013 John Wiley & Sons, Ltd.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Journal or Publication Title: | International Journal for Numerical Methods in Engineering | ||||||
Publisher: | John Wiley & Sons Ltd. | ||||||
ISSN: | 0029-5981 | ||||||
Official Date: | 17 February 2014 | ||||||
Dates: |
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Volume: | 97 | ||||||
Number: | 7 | ||||||
Page Range: | pp. 531-550 | ||||||
DOI: | 10.1002/nme.4603 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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