Floating objects with finite resistance to bending.
Floating objects with finite resistance to bending.
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DOI：
10.1021/la800245k
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发表时间：
2008-07
期刊：
影响因子：
--
通讯作者：
D. Vella
中科院分区：
文献类型：
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作者：
D. Vella
本文研究薄的柔性圆柱体在液-气界面上的平衡漂浮问题。特别是，我们确定了这样的圆柱体在不下沉的情况下可以支撑的最大载荷。我们发现，随着这种圆柱长度的增加，最大载荷首先增加。然而，当圆柱体的长度与弹性毛细管长度相当时，最大载荷达到平台，弹性毛细管长度由圆柱体的弯曲和表面张力之间的平衡确定。然后，我们考虑我们的分析的影响，在水上行走的节肢动物和人造机器人。特别是，我们表明，腿的水？通常略短于这个“最佳”的长度，这表明弹性毛细血管效应可能会作为一个选择压力。
We consider the equilibrium flotation of a thin, flexible cylinder at the interface between a liquid and a gas. In particular, we determine the maximum load that such a cylinder can support without sinking. We find that as the length of such a cylinder increases the maximum load at first increases. However, the maximum load reaches a plateau when the length of the cylinder is comparable to the elastocapillary length, which is determined by a balance between the bending of the cylinder and surface tension. We then consider the implications of our analysis for the walking on water of both arthropods and man-made robots. In particular, we show that the legs of water striders are typically slightly shorter than this 'optimal' length, suggesting that elastocapillary effects may act as a selection pressure.