Department of Structural Engineering, University of California, San Diego, La Jolla, CA 92093, USA.
J Struct Biol. 2010 Jun;170(3):484-500. doi: 10.1016/j.jsb.2010.01.006. Epub 2010 Jan 28.
Direct experimental probes of the mechanical response of the biopolymer framework of nacre extracted from the shell of the gastropod Haliotis rufescens have been performed. Both monotonic tensile, and time dependent relaxation, tests revealed that the tissue comprising the interlamellar layers within nacre obeyed a simple constitutive model conforming to the visco-elastic standard linear solid, with time constants in the range tau=140+/-4s. We conclude that the behavior is essentially that imparted by the chitin core of these layers. Interestingly we find that the chitin network of the core appears to be connected over multiple CaCO(3) tiles. A simple composite model is formulated and used to interpret the observed behavior.
已经对来自腹足纲软体动物红鲍贝壳中的生物聚合物框架的机械响应进行了直接的实验探测。单调拉伸和时变松弛测试表明，组成珍珠层层间的组织符合粘弹性标准线性固体的简单本构模型，时间常数范围在 tau=140+/-4s。我们得出结论，这种行为基本上是由这些层的甲壳素核心赋予的。有趣的是，我们发现核心的甲壳素网络似乎连接在多个 CaCO(3) 瓦片上。提出了一个简单的复合模型来解释观察到的行为。
