Anisotropic failure and size effects in periodic honeycomb materials: A gradient-elasticity approach
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- 作者：Julien Ré ; thoré ; ; julien.rethore@ec-nantes.fr ; Thi Bach Tuyet Dang ; Christine Kaltenbrunner
- 关键词：Crack propagation ; Gradient-elasticity ; Digital image correlation ; Identification
- 刊名：Journal of the Mechanics and Physics of Solids
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：99
- 期：Complete
- 页码：35-49
- 全文大小：1781 K
- 卷排序：99
文摘
This paper proposes a fracture mechanics model for the analysis of crack propagation in periodic honeycomb materials. The model is based on gradient-elasticity which enables us to account for the effect of the material structure at the macroscopic scale. For simulating the propagation of cracks along an arbitrary path, the numerical implementation is elaborated based on an extended finite element method with the required level of continuity. The two main features captured by the model are directionality and size effect. The numerical predictions are consistent with experimental results on honeycomb materials but also with results reported in the literature for microstructurally short cracks in metals.