Abstract We visualized, in real time, the deformation and failure of single fibers that were transversely cut at high loading rate. A reverse impact experimental technique was employed to introduce the dynamic cutting load onto the fiber. The failure process of the fiber was captured via an ultra-high-speed camera combined with an ultra-long working distance objective lens. Three failure modes were identified: partial penetration followed by tensile failure, complete incision and bending-induced brittle failure without penetration, corresponding to the KevlarⓇ KM2 Plus, DyneemaⓇ SK76 and S-2 Glass fiber, respectively. Such failure modes were found to be rate-independent but highly rely on the fiber nanostructure. It was found that all fibers had an increased energy absorption as the rate increased. Effects of fiber length and cut angle were also studied, potentially providing insight into the material design of cut-resistant textiles or composites.

中文翻译：

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横向动态切割下单根高性能纤维的破坏行为

摘要 我们实时可视化以高加载速率横向切割的单纤维的变形和破坏。采用反向冲击实验技术将动态切割载荷引入光纤。通过超高速相机结合超长工作距离物镜捕捉光纤的失效过程。确定了三种失效模式：部分穿透，然后是拉伸失效、完全切口和无穿透的弯曲引起的脆性破坏，分别对应于 KevlarⓇ KM2 Plus、DyneemaⓇ SK76 和 S-2 玻璃纤维。发现这种失效模式与速率无关，但高度依赖于纤维纳米结构。发现随着速率增加，所有纤维具有增加的能量吸收。