向列弹性体的临界条纹域不稳定性

H. Finkelmann, I. Kundler, E. Terentjev, M. Warner
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引用次数: 85

摘要

我们对单畴向列弹性体中条纹域的临界形成进行了实验和理论研究。当材料垂直于初始指向线拉伸时,形成具有交替指向旋转感的畴。广泛的不同样品显示在阈值变形处具有指向旋转的奇异起始点,并且在条纹域区域的末端具有第二个奇异点。所有的数据都汇集到一个总图上,揭示了一个普遍的行为。从理论上分析了条纹相的阈值特性。自由能的分析产生了一阶跃迁到完全粗化的织构,没有任何正弦调制的中间状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Critical Stripe-Domain Instability of Nematic Elastomers
We present an experimental and theoretical investigation of the critical formation of stripe domains in monodomain nematic elastomers. Domains with alternating sense of director rotation are formed when the material is stretched perpendicular to the initial director alignment. A wide range of differing samples are shown to have a singular onset to director rotation at a threshold deformation and a second singular point at the end of the stripe domain region. All the data collapses onto a master plot revealing a universal behaviour. We analyse theoretically the threshold properties of the stripe phase. The analysis of free energy yields a first order transition into a fully-coarsened texture without any intermediate state of sinusoidal modulation.
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