Bio-Inspired Dual-Anchor Burrowing: Effect of Vertical Curvature of the Shell
Bio-Inspired Dual-Anchor Burrowing: Effect of Vertical Curvature of the Shell
复制标题
仿生双锚挖掘：贝壳垂直曲率的影响
DOI：
10.1061/9780784482834.031
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Tao, J.
中科院分区：
文献类型：
--
作者：
Huang, S.;Tao, J.
许多生物依靠双锚策略来挖洞。一个突出的生物学榜样是大西洋剃刀蛤。通过协调身体各部分的形状变化：打开/关闭刚性外壳，肌肉足的伸展/收缩，以及远端踏板的膨胀/释放，剃刀蛤可以非常有效和高效地挖洞。采用三维离散元方法，在多尺度下模拟了两个双锚弹与周围颗粒介质的相互作用。侵彻体包括两个主要部分：一个直径随时间变化的细长“壳体”和一个圆锥形“底脚”。考虑了两种不同的侵彻体：一种为均匀圆柱形壳体，另一种为梭形壳体。粒状材料由具有渥太华F65的放大粒度分布的球形颗粒组成。利用三轴试验数据对微尺度参数进行了标定和验证。壳形态的影响进行了研究。结果表明，开孔过程中，壳体周围土体受到压缩而形成锚固，同时释放了桩脚周围的应力。梭形壳形态被发现有有限的影响，在脚穿透过程中的穿透阻力和壳锚固。仍需要系统的参数研究来验证流线型外壳改善剃刀蛤的穴居性能的假设。
Many organisms rely on dual-anchor strategy to burrow. A prominent biological role model is the Atlantic razor clam. By concerting the shape changing of various body parts: opening/closing of a rigid shell, extension/contraction of the muscular foot, and inflation/relief of the distal pedal, razor clams can burrow very effectively and efficiently. Using 3D discrete element method modeling, the interactions between two clam inspired dual-anchor penetrators and the surrounding granular media were captured at multiscale. A penetrator includes two major parts: a slender “shell” with time-varying diameter, and a conical “foot”. Two different penetrators were considered: one with a uniform cylindrical shell and the other with a fusiform shell. The granular material consists of spherical particles with an upscaled particle size distribution of Ottawa F65. Microscale parameters are calibrated and validated with experimental triaxial test data. The impact of shell morphology is studied. It is found that opening of the shells compresses the soil around the shell to form anchorage, and at the same time releases the stress around the foot. A fusiform shell morphology is found to have limited influence on the penetration resistance and the shell anchorage during the foot penetration process. A systematic parametric study is still needed to test the hypothesis that a streamlined shell improves the burrowing performance of razor clams.
基质和贝壳形状对几种常见双壳类动物挖洞的影响
DOI：
--
发表时间：
1966
期刊：
影响因子：
--
作者：
E. R. Trueman;A. Brand;P. Davis
通讯作者：
P. Davis
湿土中挖掘的动力学
影响因子：
3.2
作者：
Sunghwan Jung;A. Winter;Anette Hosoi
通讯作者：
Anette Hosoi
影响因子：
3.7
作者：
Ruiz S;Or D;Schymanski SJ
通讯作者：
Schymanski SJ