剪切弯曲薄板中的弹性图案序列
A sequence of elastic patterns in a sheared bent sheet
AI总结：
研究中等长宽比的剪切弯曲薄板中的分岔和弹性图案序列，通过局部特征（常为S形对）的通过实现曲率反转，观察到嵌套力-位移滞后环和图案粗化与细化机制。
摘要：
我们记录了中等长宽比的剪切弯曲薄板中的一系列分岔和弹性图案。这些薄板通过局部特征（常为S形对）的通过经历曲率反转。嵌套的力-位移滞后环为蛇行提供了实验证据。观察到图案粗化和细化的几种机制，包括分裂、合并以及通过开放边界逃逸。虽然大多数力（包括完全突跳所需的力）与薄板长度成比例，但图案成核时的初始力下降随长度迅速减小。
英文摘要：
We document a sequence of bifurcations and elastic patterns in sheared bent sheets of intermediate aspect ratio. The sheets undergo inversion of curvature through the passage of localized features, often in S-shaped pairs. Nested force-displacement hysteresis loops provide experimental evidence for snaking. Several mechanisms for coarsening and refinement of the patterns are observed, including splitting, merging, and escape through open boundaries. While most forces, including that required for full snap-through, scale with the length of the sheet, the initial drop in force upon pattern nucleation decreases rapidly with length.
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