Reference : Role of interfacial transition zone in phase field modeling of fracture in layered he...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/10993/36924
Role of interfacial transition zone in phase field modeling of fracture in layered heterogeneous structures
English
Nguyen, Thanh Tung mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
Waldmann, Danièle mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit]
Bui, T. Q. [> >]
2019
Journal of Computational Physics
Elsevier
386
585-610
Yes (verified by ORBilu)
0021-9991
1090-2716
Atlanta
GE
[en] fracture ; layered structure ; cohesive zone model ; crack propagation ; phase field model ; FEA
[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.
http://hdl.handle.net/10993/36924

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