Role of interfacial transition zone in phase field modeling of fracture in layered heterogeneous structures

JOURNAL OF COMPUTATIONAL PHYSICS

卷:386

Article

Thanh-Tung Nguyen¹  Waldmann, Daniele¹  Tinh Quoc Bui^2,3 

[1] Univ Luxembourg, Lab Solid Struct, 6 Rue Richard Coudenhove Kalergi, L-1359 Luxembourg, Luxembourg

[2] Duy Tan Univ, Inst Res & Dev, Da Nang City, Vietnam

[3] Tokyo Inst Technol, Dept Civil & Environm Engn, Meguro Ku, 2-12-1-W8-22 Ookayama, Tokyo 1528552, Japan

关键词: Fracture;    Layered structure;    Cohesive zone model;    Crack propagation;    Phase field model;    Finite element analysis;   

DOI  :  10.1016/j.jcp.2019.02.022

来源: Elsevier

【 摘 要 】

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 variational 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. (C) 2019 Elsevier Inc. All rights reserved.

【 授权许可】

Free