Recent application of caustics on experimental dynamic fracture studies
Recent application of caustics on experimental dynamic fracture studies
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DOI：
10.1111/j.1460-2695.2010.01539.x
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发表时间：
2011-06
影响因子：
3.7
通讯作者：
X. Yao;W. Xu
中科院分区：
文献类型：
--
作者：
X. Yao;W. Xu
焦散线法与高速摄影相结合是研究均质各向同性材料动态断裂行为的一种有效的光学测量技术。近十年来，研究的重点已扩展到各向异性材料的动态断裂以及实际工程材料中多裂纹和界面裂纹的动态扩展。本文综述了动态焦散线法在复合材料（纤维复合材料、梯度功能材料和纳米复合材料）的冲击响应和动态断裂、多裂纹和界面裂纹的动态相互作用和扩展等方面的研究进展和应用。特别是通过引入焦散斑图的最大特征尺寸和相关角，发展了一些新的数值方法来求解复杂的焦散方程。介绍了断裂力学中的一些重要实验结果，并展望了动态焦散线的研究前景。
Combining the caustic method with high-speed photography is an efficient optical measurement technique to study the dynamic fracture behaviours of homogenous and isotropic material. In the last decade, the main emphasis is extended to study dynamic fracture of anisotropic material and dynamic propagation of multi-cracks and interface cracks in practical engineering materials. In this paper, the recent advances and applications about the dynamic caustic method in China are reviewed, such as impact response and dynamic fracture of composite materials (fibre composites, functionally gradient materials and nanometre composites), and dynamic interaction and propagation of multi-cracks and interface cracks. Particularly, some new numerical methods were developed to solve the complicated caustic equations by introducing both the maximum characteristic size and the relevant angles in caustic patterns. Also, some important experimental results in fracture mechanics are described, and the potential research prospects about dynamic caustics are included as well.