Mechanical anisotropy in cobra skin is related to body movement
Mechanical anisotropy in cobra skin is related to body movement
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DOI：
10.1080/09243860600707421
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发表时间：
2005-10-01
期刊：
影响因子：
--
通讯作者：
Osaki, Shigeyoshi
中科院分区：
文献类型：
--
作者：
Niitsuma, Katsunori;Miyagawa, Sachiko;Osaki, Shigeyoshi
研究了眼镜蛇皮革的机械断裂应力和应变及其力学各向异性与人体运动的关系。从尾骨到颅端垂直于方向（CCD）的横向机械断裂应变（TD），在背部周围明显大于CCD，在腹部周围略大于CCD。机械应变与皮肤的膨胀密切相关。眼镜蛇皮的力学各向异性在背部较大，而在腹部较小。这些结果表明，眼镜蛇体相对容易在背部周围的TD内优先扩张，并且在腹部周围的各个方向上也大致均匀扩张，而背部在CCD内的扩张受到脊柱的限制。这些发现还表明，眼镜蛇皮革的强机械各向异性与腰部皮肤的运动密切相关，而腰部皮肤的运动伴随着身体的运动。
The mechanical breaking stress and strain of cobra leather, along with their mechanical anisotropies, were studied in relation to body movement. The mechanical breaking strain in the transverse direction (TD), which was perpendicular to the direction (CCD) from the caudal to the cranial end, was much larger around the dorsum, and slightly larger around the abdomen, than that in the CCD. The mechanical strain is closely related to the expansion of skin. The mechanical anisotropy of cobra leather was relatively large in the dorsum, but smaller in the abdomen. These findings indicate that it was comparatively easy for the cobra body to expand preferentially in the TD around the dorsum and also to expand roughly equally in all directions around the abdomen, whereas expansion of the dorsum in the CCD was restricted by the spinal column. These findings also suggest that the strong mechanical anisotropy in cobra leather is closely related to the motion of the skin around the waist, which accompanies movement of the body.