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首页> 外文会议>29th Leeds-Lyon Symposium on Tribology Sep 3-6, 2002 University of Leeds, UK >Tribology of a Snail (Terrestrial Gastropod)
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Tribology of a Snail (Terrestrial Gastropod)

机译：蜗牛的摩擦学（陆地腹足纲）

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摘要

The locomotion characteristics of a snail (terrestrial gastropod) that can move forward extremely smoothly not only on the horizontal substratum but also even on walls and reverse on ceilings, are examined experimentally in the, tribological standpoint. The locomotion can be achieved by the combination of the progressive wave (pedal wave) of the ventral surface of the foot and the secreted viscous mucus. From pulling off force experiments, the holding force of a snail to a substratum does not depend on the sole area. According to NMR analysis, viscous secreted mucus of consists of about93% of water and 7% of glycoprotein. From the experimental examinations of mechanical properties such as viscosity variation versus shear rate, the relationship between shear strength and mucus film thickness and the relationship between shear rate and shear stress, the secreted viscous mucus of a snail is a non-Newtonian fluid that has visco-plastic characteristics. The movement of snails is obtained by a fine peristalitic motion, based on the combination of the concave shaped contraction of the ventral surface muscle during the passage of the pedal wave and the stretched ventral surface muscle without pedal wave passing. The driving force is generated at the anterior part of the ventral surface as a whole and the posterior part is only dragged. The ventral surface of the foot has a sucking in function and snails circulate secreted mucus around the sole and reuse it skillfully.
机译：从摩擦学的角度，对蜗牛（陆地腹足动物）的运动特性进行了实验研究，该蜗牛不仅可以在水平基底上平滑移动，而且甚至可以在墙壁上甚至在天花板上反向移动。可以通过脚腹面的渐进波（踏板波）和分泌的粘性粘液的组合来实现运动。通过拉力实验，蜗牛对基底的保持力不依赖于鞋底面积。根据NMR分析，粘性分泌的粘液由约93％的水和7％的糖蛋白组成。通过机械性能的实验检查，例如粘度变化与剪切速率，剪切强度与粘液膜厚度之间的关系以及剪切速率与剪切应力之间的关系，蜗牛分泌的粘性粘液是具有粘性的非牛顿流体。塑特性。蜗牛的运动是通过细微的蠕动运动获得的，该运动基于踏板波通过期间腹面肌的凹形收缩和没有踏板波通过的拉伸腹面肌的结​​合。在整个腹面的前部产生驱动力，而后部仅被拖动。脚的腹面具有吸吮功能，蜗牛在脚底周围循环分泌的粘液并熟练地重复使用。

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