Dispersive wave propagation in disordered flexible fibers enhances stress attenuation

Peng Wang, Thomas Pähtz, Kun Luo, Yu Guo
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Abstract

We experimentally and computationally analyze impact-shock-induced stress wave propagation in packings of disordered flexible fibers. We find that dispersive wave propagation, associated with large stress attenuation, occurs much more prevalently in systems with larger fiber aspect ratios and moderate fiber flexibility. We trace these features to the microstructural properties of fiber contact chains and the energy-trapping abilities of deformable fibers. These findings provide new insights into physics of the shock-impacted flexible fiber packings and open the way towards an improved granular-material-based damping technology.
无序柔性纤维中的色散波传播可增强应力衰减
我们通过实验和计算分析了冲击波在无序柔性纤维填料中的传播。我们发现,在纤维长径比较大、纤维柔性适中的系统中,与大应力衰减相关的分散波传播更为普遍。我们将这些特征归因于纤维接触链的微结构特性和可变形纤维的能量捕获能力。这些发现为冲击影响柔性纤维填料的物理学提供了新的见解,并为改进基于颗粒材料的阻尼技术开辟了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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