Wang Peng, Han Jiawei, Wang Siyuan, Guo Yu
Huanjiang Laboratory, Zhuji 311800, China.
Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China.
Materials (Basel). 2024 Dec 10;17(24):6042. doi: 10.3390/ma17246042.
Flexible fibers, such as biomass particles and glass fibers, are critical raw materials in the energy and composites industries. Assemblies of the fibers show strong interlocking, non-Newtonian and compressible flows, intermittent avalanches, and high energy dissipation rates due to their elongation and flexibility. Conventional mechanical theories developed for regular granular materials, such as dry sands and pharmaceutical powders, are often unsuitable for modeling flexible fibers, which exhibit more complex mechanical behaviors. This article provides a comprehensive review of the current state of research on the mechanics of flexible fiber assemblies, focusing on their behavior under compression, shear flow, and gas-fiber two-phase flow processes. Finally, the paper discusses open issues and future directions, highlighting the need for advancements in granular theories to better accommodate the unique characteristics of flexible fibers, and suggesting potential strategies for improving their handling in industrial applications.
柔性纤维，如生物质颗粒和玻璃纤维，是能源和复合材料行业的关键原材料。由于其伸长性和柔韧性，这些纤维组件表现出强烈的联锁、非牛顿和可压缩流动、间歇性崩塌以及高能量耗散率。为常规粒状材料（如干砂和药用粉末）开发的传统力学理论通常不适用于对柔性纤维进行建模，因为柔性纤维表现出更复杂的力学行为。本文全面综述了柔性纤维组件力学的研究现状，重点关注它们在压缩、剪切流和气体-纤维两相流过程中的行为。最后，本文讨论了未解决的问题和未来方向，强调了粒状理论进步以更好地适应柔性纤维独特特性的必要性，并提出了在工业应用中改善其处理的潜在策略。
