In-situ observation of damage evolution in polycarbonate subjected to hypervelocity impact
In-situ observation of damage evolution in polycarbonate subjected to hypervelocity impact
复制标题
超高速冲击下聚碳酸酯损伤演化的现场观察
DOI：
10.1016/j.ijimpeng.2020.103584
复制
发表时间：
2020
影响因子：
5.1
通讯作者：
Sato Eiichi
中科院分区：
文献类型：
--
作者：
Kawai Nobuaki;Nagano Mikio;Hasegawa Sunao;Sato Eiichi
对聚碳酸酯进行了超高速冲击实验，研究了高分子材料内部冲击损伤过程的进展。利用超高速摄像机，采用两种成像方法对超高速撞击过程中的损伤演化和应力波传播进行了观察。第一个是双向（侧视和后视镜）散射光成像。所获得的时间分辨图像不仅提供了损伤发展的三维时间演化信息，而且还提供了损伤纹理的信息。第二种是交叉偏振阴影图。在这次测量中，应力场的传播清晰可见。本研究获得的结果清楚地表明，结合各种成像方法（每种成像方法可以提供不同的信息）是了解与超高速撞击相关的损伤过程和机制的有用方法。
Hypervelocity impact experiments were performed on polycarbonates to investigate the progress of the impact-induced damage process inside the polymer material. Damage evolution and stress wave propagation associated with hypervelocity impact were observed by two imaging methods using ultra-high-speed cameras. The first was two-directional (side-view and rear-view) scattered light imaging. Time-resolved images obtained provided information about the three-dimensional time evolution of not only the damage development, but also the damage texture. The second was cross-polarized shadowgraphs. In this measurement, propagation of the stress field was clearly visualized. The results obtained in this study clearly indicate that the combination of various imaging methods, where each one can provide different information, is a useful way to obtain insights into the damage process and mechanism associated with hypervelocity impact.