圆柱体中拉伸和扭曲肥皂膜的不稳定性
Instability of stretched and twisted soap films in a cylinder
摘要：
肥皂膜，或柔性膜没有弯曲和扭转刚度，这是限制在一个圆柱体被证明是容易受到表面张力驱动的不稳定性时，它是拉伸或扭曲。这导致其击穿并对此类结构的纵横比设置上限。一个简单的分析证实了在肥皂膜的模拟和实验中发现的拉伸膜的临界纵横比的值，并且该阈值随着膜的扭曲度的增加而减小。
英文摘要：
A soap film, or a flexible membrane without bending and torsional stiffness, that is confined in a cylinder is shown to be susceptible to a surface-tension-driven instability when it is stretched or twisted. This leads to its breakdown and places an upper limit on the aspect ratio of such structures. A simple analysis confirms the values for the critical aspect ratio of the stretched film found in both simulations and experiments on soap films, and this threshold decreases with increasing twist of the film.
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