Mixed-mode I+II continuum damage model applied to fracture characterization of bonded joints

被引：13
|
作者：
Chousal, J. A. G. [1 ]
de Moura, M. F. S. F. [1 ]
机构：
[1] Univ Porto, Fac Engn, Dept Engn Mecan, P-4200465 Oporto, Portugal
来源：
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 2013年 / 41卷
关键词：
Bonded joints; Fracture characterization; Mixed-mode; Continuum damage model; INTERFACE ELEMENTS; ADHESIVE JOINTS; STRESS; PREDICTION; STRENGTH;
D O I：
10.1016/j.ijadhadh.2012.10.014
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A continuum mixed-mode I+II damage model allowing simulation of damage initiation and propagation in adhesive bonded joints is presented. The model is based on a stress criterion to identify damage onset and a fracture mechanics criterion to simulate gradual degradation of stiffness during loading. It is implemented in two-dimensional solid elements thus allowing identifying the volumetric shape of damaged regions in the vicinity of the crack tip. Additionally, the model is able to predict crack kinking which occurs as a function of the used criteria. The application of the proposed methodology in the context of pure modes (I and II) fracture characterization tests of bonded joints provide the evaluation of the influence of asymmetric propagation on the measured fracture energies. This phenomenon becomes more relevant with the increase of adhesive thickness. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：92 / 97
页数：6
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