Article (Scientific journals)
Role of interfacial transition zone in phase field modeling of fracture in layered heterogeneous structures
NGUYEN, Thanh Tung; WALDMANN, Danièle; Bui, T. Q.
2019In Journal of Computational Physics, 386, p. 585-610
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Keywords :
fracture; layered structure; cohesive zone model; crack propagation; phase field model; FEA
Abstract :
[en] Mechanical behavior of layered materials and structures greatly depends on the mechanical behavior of interfaces. In the past decades, the failure in such layered media has been studied by many researchers due to their critical role in the mechanics and physics of solids. This study aims at investigating crack-interface interaction in two-dimensional (2-D) and three-dimensional (3-D) layered media by a phase field model. Our objectives are fourfold: (a) to better understand fracture behavior in layered heterogeneous systems under quasi-static load; (b) to introduce a new methodology for better describing interfaces by a regularized interfacial transition zone in the context of varia-tional phase field approach, exploring its important role; (c) to show the accuracy , performance and applicability of the present model in modeling material failure at the interfaces in both 2-D and 3-D bodies; and (d) to quantitatively validate computed crack path with respect to experimental data. Phase field models with both perfectly and cohesive bonded interfaces are thus derived. A regularized interfacial transition zone is introduced to capture characteristics of material mismatch at the interfaces. Numerical examples for 2-D and 3-D layered systems with experimental validation provide fundamentals of fracture behavior in layered structures. The obtained results shed light on the behavior of crack paths, which are drastically affected by the elastic modulus mismatch between two layers and interface types, and reveal the important role of the proposed interfacial transition zone in phase field modeling of crack interface interactions.
Disciplines :
Materials science & engineering
Author, co-author :
NGUYEN, Thanh Tung ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
WALDMANN, Danièle ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Bui, T. Q.
External co-authors :
yes
Language :
English
Title :
Role of interfacial transition zone in phase field modeling of fracture in layered heterogeneous structures
Publication date :
2019
Journal title :
Journal of Computational Physics
ISSN :
1090-2716
Publisher :
Elsevier, Atlanta, Georgia
Volume :
386
Pages :
585-610
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 12 October 2018

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