弹性毛细管实验中变形机制的判别
Distinguishing deformation mechanisms in elastocapillary experiments
摘要：
已知软材料由于各种机制而变形，包括毛细作用、浮力和膨胀。在本文中，我们提出了实验聚乙烯硅氧烷凝胶线部分浸泡在三种不同的溶解度，润湿性和溶胀性的液体。我们的研究结果表明，由于毛细作用，浮力和膨胀的变形可以是类似的大小，因为这样的线程来静力平衡。为了解释所有这三种效应存在于一个单一的系统中，我们推导出一个模型，能够解释所观察到的数据，并用它来确定在三相接触线的力法。结果表明，测得的力与预期的Young-Dupré方程一致，并且不需要包括切向接触线力。
英文摘要：
Soft materials are known to deform due to a variety of mechanisms, including capillarity, buoyancy, and swelling. In this paper, we present experiments on polyvinylsiloxane gel threads partially-immersed in three liquids with different solubility, wettability, and swellability. Our results demonstrate that deformations due to capillarity, buoyancy, and swelling can be of similar magnitude as such threads come to static equilibrium. To account for all three effects being present in a single system, we derive a model capable of explaining the observed data and use it to determine the force law at the three-phase contact line. The results show that the measured forces are consistent with the expected Young-Dupré equation, and do not require the inclusion of a tangential contact line force.
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