Fracture Mechanics Analysis of Composite Microcracking: Experimental Results in Fatigue
Fracture Mechanics Analysis of Composite Microcracking: Experimental Results in Fatigue
复制标题
复合材料微裂纹的断裂力学分析：疲劳实验结果
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
S. Liu
中科院分区：
文献类型：
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作者：
J. Nairn;S. Liu
最近的一个变分力学分析给出了由于在两个微裂纹之间形成一个新的微裂纹而引起的能量释放率（John A. Nairn，J. Comp. Mat.，23，1106（1989））。这一分析对提供正交层合板基体微裂纹的断裂力学解释是有用的。本文介绍了使用新的能量释放率分析的断裂力学为基础的解释在疲劳加载过程中的微裂纹的形成。疲劳实验运行的Avimid R � K聚合物/IM 6层压板的三个叠层和Fiberite 934/T300层压板的四个叠层。一个修改后的巴黎定律被使用，从一个单一的材料系统的所有叠层的数据被发现落在一个单一的主巴黎定律图。我们认为，主巴黎定律图给出了一个完整的表征，一个给定的材料系统的抗微裂纹形成在疲劳载荷。
A recent variational mechanics analysis gives the energy release rate due to the formation of a new microcrack between two exisiting microcracks (John A. Nairn, J. Comp. Mat., 23, 1106 (1989)). This analysis has been useful in providing fracture mechanics interpretation of matrix microcracking in cross-ply laminates. This paper describes using the new energy relase rate analysis for a fracture mechanics based interpretation of microcrack formation during fatigue loading. Fatigue experiments were run of three layups of Avimid R � K Polymer/IM6 laminates and on four layups of Fiberite 934/T300 laminates. A modifed Paris-law was used and the data from all layups of a single material system were found to fall on a single master Paris-law plot. We claim that the master Paris-law plot gives a complete characterization of a given material system’s resistance to microcrack formation during fatigue laoding.