Modeling of interfacial debonding crack in particle reinforced composites using Voronoi cell finite element method
Modeling of interfacial debonding crack in particle reinforced composites using Voronoi cell finite element method
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DOI：
10.1007/s00466-003-0461-0
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发表时间：
2003-09
影响因子：
4.1
通讯作者：
R. Guo;H. Shi;Z. Yao
中科院分区：
文献类型：
--
作者：
R. Guo;H. Shi;Z. Yao
本文采用Ghosh等（1993）提出的Voronoi细胞有限元法（VCFEM）来描述颗粒增强复合材料的基体-夹杂界面脱粘过程。在该VCFEM中，在临界法向应力规律的假设下，通过界面的部分脱粘来模拟损伤的起裂；采用界面重网格法模拟逐渐的基体-夹杂分离，将裂纹尖端的关键界面节点替换为沿脱粘的基体-夹杂界面的节点对，在裂纹尖端附近的裂纹界面上需要增加更多的节点对，以更好地满足自由牵引边界条件和解的跳跃。提出的VCFEM与商用有限元软件MARC和ABAQUS结果的比较。给出了单个夹杂物逐渐剥离界面和包含20个夹杂物的复杂结构的例子来描述平面应力条件下的界面损伤。VCFEM与一般有限元法的结果吻合较好。结果表明，该方法是一种较为有效的处理复合材料界面损伤的方法。
In this paper, Voronoi cell finite element method (VCFEM), introduced by Ghosh and coworkers (1993), is applied to describe the matrix-inclusion interfacial debonding for particulate reinforced composites. In proposed VCFEM, the damage initiation is simulated by partly debonding of the interface under the assumption of the critical normal stress law, and gradual matrix-inclusion separations are simulated with an interface remeshing method that a critical interfacial node at the crack tip is replaced by a node pairs along the debonded matrix-inclusion interface and a more pair of nodes are needed to be added on the crack interface near the crack tip in order to better facilitate the free-traction boundary condition and the jumps of solution. The comparison of the results of proposed VCFEM and commercial finite element packages MARC and ABAQUS. Examples have been given for a single inclusion of gradually interfacial debonding and for a complex structure with 20 inclusions to describe the interfacial damage under plane stress conditions. Good agreements are obtained between the VCFEM and the general finite element method. It appears that this method is a more efficient way to deal with the interfacial damage of composite materials.