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在弹性纤维中捆绑架构,应用扭曲
Amit Dawadi1, Animesh Biswas1, Julien Chopin2
1Clark University, Department of Physics, Worcester, Massachusetts 01610, USA.
Physical review. E
|August 19, 2025
概括
这项研究探讨了超弹性纤维在扭曲下如何形成螺旋束. 由于辐射不稳定性,发光线包装变得混乱,影响捆束半径和扭矩.
科学领域:
- 材料科学 材料科学 材料科学
- 软物质物理学 软物质物理学
- 材料机械学 材料机械学
背景情况:
- 了解捆绑丝的机械行为对于设计新型材料和设备至关重要.
- 在有限的柔性元素中形成有序和无序的结构是一个复杂的现象,在各种领域都有影响.
- 之前的研究已经探讨了丝捆绑,但缺乏对过渡到无序状态和相关扭矩的详细分析.
研究的目的:
- 为了研究螺旋式多线束的形成和作为应用扭曲的函数所需的扭矩.
- 分析从有序到无序的光纤包装的过渡及其潜在机制.
- 开发一个理论框架来预测基于灯丝属性和施加负载的束体几何和扭矩.
主要方法:
- 实验设置涉及在可移动端上以圆形阵列安装的超弹性纤维.
- 应用受控的扭转和轴负荷来诱导捆绑形成.
- 进行X射线断层扫描以可视化和分析丝束的内部结构和包装.
- 能源最小化分析,结合新胡克材料属性来建模捆绑行为.
主要成果:
- 纤维最初形成过度波形的超波形表面,然后被包装成螺旋捆.
- 在较高的线索数和扭曲率下,捆绑顺序过渡到无序,由辐射不稳定性驱动.
- X射线断层扫描显示,在混乱状态下,捆束半径和丝迁移的减少.
- 束内螺旋角保持不变,但倾斜角随着辐射距离的增加而增加.
- 能源最小化分析准确地预测了带的长度和扭矩变化,以及丝的数量和扭曲.
结论:
- 该研究阐明了螺旋式多纤维束形成的机制,突出了辐射不稳定性在混乱中的作用.
- 一个基于能量最小化和新胡克弹性的预测模型成功地捕获了观察到的捆形几何和非线性扭矩响应.
- 这些发现为工程和生物系统中复杂纤维结构的设计和行为提供了洞察力.
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