The smectic order of wrinkles.

The smectic order of wrinkles.
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DOI:
10.1038/ncomms15809
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发表时间:
2017-07-18
影响因子:
16.6
通讯作者:
Katifori E
Katifori E
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Aharoni H;Todorova DV;Albarrán O;Goehring L;Kamien RD;Katifori E

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弹性薄片躺在柔软的衬底上,当受到外部压力或几何不相容时,会产生褶皱图案。薄板弹性和基材响应使这种皱纹具有全球首选的皱纹间距长度,并具有抗皱曲性。这些特征导致了这类体系在中等长度尺度下的液晶近晶行为。这种洞察使我们可以更好地理解在这样的系统中看到的皱纹模式,我们用它来解释模式分解成域、域壁的属性和皱纹波动。我们将我们的预测与数值模拟和实验观测进行了比较。弹性薄片会产生皱纹,形成与液晶特征相似的图案。在这里,作者利用这个类比,提出了弹性薄板问题和近晶液晶问题之间的映射,从而能够更好地理解褶皱。
A thin elastic sheet lying on a soft substrate develops wrinkled patterns when subject to an external forcing or as a result of geometric incompatibility. Thin sheet elasticity and substrate response equip such wrinkles with a global preferred wrinkle spacing length and with resistance to wrinkle curvature. These features are responsible for the liquid crystalline smectic-like behaviour of such systems at intermediate length scales. This insight allows better understanding of the wrinkling patterns seen in such systems, with which we explain pattern breaking into domains, the properties of domain walls and wrinkle undulation. We compare our predictions with numerical simulations and with experimental observations. A thin elastic sheet can develop wrinkles which arrange into patterns similar to those characteristic of liquid crystals. Here the authors use this analogy to propose a mapping between the elastic sheet problem and the smectic liquid crystal problem which can enable a better understanding of wrinkling.
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