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首页> 外文期刊>Acta biomaterialia >Axial compression of a hollow cylinder filled with foam: A study of porcupine quills
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Axial compression of a hollow cylinder filled with foam: A study of porcupine quills

机译：填充泡沫的空心圆柱的轴向压缩：豪猪羽毛笔的研究

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Porcupines use their lightweight quills, which are strong enough to support significant compression and flexure loads, for defense. Hystrix, with long and thick quills, belongs to the family of Hystricidae (Old World porcupines), while Erethizon, with smaller quills, belongs to the Erethizontidae family (New World porcupines). The objective of this work is to compare the structure and compressive properties of quills from Hystrix and Erethizon. Both quills have a thin keratinous cortex filled with closed-cell foam that has cell diameters decreasing from the center to the cortex. Hystrix quills have stiffeners that extend from the cortex towards the center. The local buckling strength is larger for Hystrix, and very good agreement is found between the predicted values and the experimental ones for both quills. The foam shows extensive deformation, both tensile and compressive, around the buckled cortex. ? 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
机译：豪猪使用其轻质羽毛笔，其强度足以支撑显着的压缩和挠曲载荷，从而起到防御作用。 Hystrix，具有长而粗的羽毛，属于Hystricidae（旧大陆豪猪）家族，而Erethizon，具有较小的羽毛，属于Erethizontidae家族（新大陆豪猪）。这项工作的目的是比较Hystrix和Erethizon的被子的结构和压缩特性。两个被子都有一个充满了闭孔泡沫的薄角蛋白皮层，其泡孔直径从中心到皮层逐渐减小。 Hystrix羽毛笔具有从皮质向中心延伸的加劲肋。 Hystrix的局部屈曲强度较大，并且两种羽毛笔的预测值和实验值之间都有很好的一致性。泡沫在弯曲的皮质周围显示出拉伸和压缩的广泛变形。 ？ 2012年Acta Materialia Inc.由Elsevier Ltd.发行。保留所有权利。

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