Hierarchical NURBS and a higher-order phase-field approach to fracture for finite-deformation contact problems
Date
2016Source Title
Computer Methods in Applied Mechanics and Engineering
Print ISSN
0045-7825
Publisher
Elsevier B.V.
Volume
301
Pages
242 - 258
Language
English
Type
ArticleItem Usage Stats
198
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Abstract
In this paper we investigate variationally consistent Mortar contact algorithms applied to a phase-field approach to brittle fracture. Phase-field approaches allow for an efficient simulation of complex fracture problems, as they arise in contact and impact situations. To improve accuracy and convergence, a fourth-order phase-field model is considered, requiring C1 continuity throughout the domain. An isogeometrical framework is used for the spatial discretisation subject to hierarchical refinements to resolve local features. This reduces the computational effort tremendously, as will be shown in a series of representative examples. © 2015 Elsevier B.V.