A combined experimental-numerical investigation of crack growth in a carbon–carbon composite
A combined experimental-numerical investigation of crack growth in a carbon–carbon composite
复制标题
碳-碳复合材料裂纹扩展的实验-数值联合研究
DOI：
10.1111/j.1460-2695.2006.01044.x
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发表时间：
2006
影响因子：
3.7
通讯作者：
T. Siegmund
中科院分区：
文献类型：
--
作者：
J. Han;T. Siegmund
本文报道了碳-碳复合材料裂纹扩展的实验与数值结合研究。在这种材料中，基体断裂和纤维桥接都对韧性有显著贡献。裂纹扩展实验采用带双倍器的侧缺口DCB试样进行。采用数字图像相关方法测量了试件表面的位移场、裂纹扩展和裂纹张开曲线。根据实验数据确定了有效粘接区规律。有效黏聚区定律随后被分解为基体开裂和纤维桥接的单独贡献。基于该黏聚区规律的裂纹扩展数值模拟与实验数据吻合较好。数值研究的重点是对裂纹扩展的不连续性质的研究。
A combined experimental-numerical investigation of crack growth in a carbon-carbon composite is reported. In this material, both matrix fracture and fibre bridging contribute significantly to toughness. Crack growth experiments were performed using side-notched DCB specimens with doublers. A digital image correlation method was used to measure displacements fields on the specimen surfaces, crack extension and crack opening profiles. An effective cohesive zone law was determined from the experimental data. The effective cohesive zone law is subsequently separated into the individual contributions from matrix cracking and fibre bridging. Numerical simulation of crack growth based on this cohesive zone law and experimental data are in good agreement. Special focus of the numerical study is on the investigation of the discontinuous nature of crack growth.