Dynamic Response and Fracture Characterization of Polymer-Clay Nanocomposites with Mode-I Crack
Dynamic Response and Fracture Characterization of Polymer-Clay Nanocomposites with Mode-I Crack
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DOI：
10.1177/0021998305050437
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发表时间：
2005-08
影响因子：
2.9
通讯作者：
Xuefeng Yao;Hsien-Yang Yeh;H. Zhao
中科院分区：
文献类型：
--
作者：
Xuefeng Yao;Hsien-Yang Yeh;H. Zhao
本文简要介绍了聚合物-粘土纳米复合材料的制备方法及其微观/纳米结构表征。采用高速摄影与光焦散线相结合的方法研究了聚合物-粘土纳米复合材料I型裂纹尖端的动态响应。记录到裂纹尖端周围的一系列焦散斑，可以反映裂纹尖端的动应力集中。提取了最大焦散特征尺寸和应力强度因子等有价值的断裂参数。纳米粒子的重量含量对纳米复合材料的动态响应的影响。用扫描电镜分析了复合材料的微观断口形貌。这些结果对纳米复合材料的设计和动态性能的评价具有重要的指导意义。
In this paper, the synthesis and micro/nanoscopic characterizations of polymer-clay nanocomposites are briefly introduced. Dynamic response for mode-I crack tip in polymer-clay nanocomposite is studied by combining high speed photography with optical caustic method. A series of caustic spots surrounding the crack tip are recorded, which can reflect the dynamic stress concentration at the crack tip. Some valuable fracture parameters such as the maximum caustic characteristic size and stress intensity factor are extracted. The influence of the weight content of nanoparticles on dynamic response of the nanocomposite is shown. Microscopic fracture images of nanocomposites are analyzed by SEM. These results are useful for the reliable design of nanocomposite techniques and the evaluation of dynamic properties of nanocomposites.