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arXiv 2302.12097nlin.PSphysics.app-ph
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类孤子脉冲碰撞下二维多稳态机械异向介质的相变

Phase transitions in 2D multistable mechanical metamaterials via collisions of soliton-like pulses

Weijian Jiao, Hang Shu, Vincent Tournat, Hiromi Yasuda, Jordan R. Raney

摘要:

在这项工作中,我们报告的观测相变在2D多稳态机械超材料中的超材料中的类孤子脉冲的碰撞发起。类似于晶体固体中的一阶相变,我们通过实验和数值计算观察到,如果新相满足或超过临界核尺寸,则多稳态超材料支持相变。如果满足这个标准,新的相位随后以过渡波的形式传播,将超材料的其余部分转换为新的相位。更有趣的是,我们观察到临界核可以通过类孤子脉冲的碰撞形成。此外,非线性脉冲的丰富的方向依赖行为使得能够控制成核的位置和生长相的时空形状。

英文摘要:

In this work, we report observations of phase transitions in 2D multistable mechanical metamaterials that are initiated by collisions of soliton-like pulses in the metamaterial. Analogous to first-order phase transitions in crystalline solids, we experimentally and numerically observe that the multistable metamaterials support phase transitions if the new phase meets or exceeds a critical nucleus size. If this criterion is met, the new phase subsequently propagates in the form of transition waves, converting the rest of the metamaterial to the new phase. More interestingly, we observe that the critical nucleus can be formed via collisions of soliton-like pulses. Moreover, the rich direction-dependent behavior of the nonlinear pulses enables control of the location of nucleation and the spatio-temporal shape of the growing phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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