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arXiv 2005.12369cond-mat.soft
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皱曲薄板破碎动力学模型

A model for the fragmentation kinetics of crumpled thin sheets

Jovana Andrejevic, Lisa M. Lee, Shmuel M. Rubinstein, Chris H. Rycroft

摘要:

当受限的薄片起皱时,它自发地分成由脊网络限定的平坦小平面。尽管这一过程明显无序,但起皱纸张的统计特性表现出惊人的可重复性。实验表明,当反复压紧和展开一张纸时,总折痕长度会以几何方式增加。在这里,我们通过探索褶皱和碎裂过程之间的对应关系,为这一意想不到的结果提供了见解。我们确定了一个物理模型的小平面面积和脊长度分布的褶皱片的演变,并提出了一种机制,几何挫折驱动的再碎片。这种机制建立了一个反馈回路,其中小平面尺寸分布告知在重复限制下的后续碎裂速率,从而产生新的尺寸分布。然后,我们证明了这个模型的能力,再现特征的对数缩放的总折痕长度,从而提供了一个缺失的物理基础所观察到的现象。

英文摘要:

As a confined thin sheet crumples, it spontaneously segments into flat facets delimited by a network of ridges. Despite the apparent disorder of this process, statistical properties of crumpled sheets exhibit striking reproducibility. Experiments have shown that the total crease length accrues logarithmically when repeatedly compacting and unfolding a sheet of paper. Here, we offer insight to this unexpected result by exploring the correspondence between crumpling and fragmentation processes. We identify a physical model for the evolution of facet area and ridge length distributions of crumpled sheets, and propose a mechanism for re-fragmentation driven by geometric frustration. This mechanism establishes a feedback loop in which the facet size distribution informs the subsequent rate of fragmentation under repeated confinement, thereby producing a new size distribution. We then demonstrate the capacity of this model to reproduce the characteristic logarithmic scaling of total crease length, thereby supplying a missing physical basis for the observed phenomenon.

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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