扭转弹性纤维中的扭转和Hockling不稳定性
Writhing and hockling instabilities in twisted elastic fibers
摘要：
细长弹性纤维的屈曲和扭转是一个深入研究的领域。相对于固定端扭转的细长弹性杆将自发地形成环，或称为环，以减轻所产生的扭转应力。进一步的扭曲导致了原丝体的形成--纤维中的螺旋偏移随着额外的扭曲而延伸。在这里，我们使用一个理想化的，微米尺度的实验来调查的能量存储，并随后释放，由hockles和plectonemes，因为他们被拉开，在类似的力光谱研究的DNA和蛋白质折叠。咬合和解咬合中的滞后环告知了扭曲纤维结构中储存的能量。
英文摘要：
The buckling and twisting of slender, elastic fibers is a deep and well-studied field. A slender elastic rod that is twisted with respect to a fixed end will spontaneously form a loop, or hockle, to relieve the torsional stress that builds. Further twisting results in the formation of plectonemes -- a helical excursion in the fiber that extends with additional twisting. Here we use an idealized, micron-scale experiment to investigate the energy stored, and subsequently released, by hockles and plectonemes as they are pulled apart, in analogy with force spectroscopy studies of DNA and protein folding. Hysteresis loops in the snapping and unsnapping inform the stored energy in the twisted fiber structures.
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