We investigate experimentally the dynamic phase transition from compressed to buckled phases for thin sheets of rubber. We find that the rubber strips enter a highly compressed, metastable state when compression speed is high. During the compressed phase, higher modes grow, followed by mode coarsening. Mode growth is accompanied by an expansion of length while the system is still being compressed. We measure the forces and length of the sheet to confirm this, and we develop a mechanism for how modes grow and coarsen during dynamical buckling. The influence of crucial control parameters in the experiments, such as the material cross section and compression speed, on the buckling dynamics, are explained theoretically.

中文翻译：

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薄软片中的压缩控制动态屈曲

我们通过实验研究了橡胶薄片从压缩相到屈曲相的动态相变。我们发现当压缩速度高时，橡胶条进入高度压缩的亚稳态状态。在压缩阶段，高级模式增长，然后是模式粗化。当系统仍处于压缩状态时，模态增长伴随着长度的扩展。我们测量了板材的力和长度以确认这一点，并且我们开发了一种机制，用于在动态屈曲期间模式如何增长和变粗。从理论上解释了实验中关键控制参数（例如材料横截面和压缩速度）对屈曲动力学的影响。