藤壶通过裂纹捕获来抵抗去除。
Barnacles resist removal by crack trapping.
机构信息
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.
出版信息
J R Soc Interface. 2011 Jun 6;8(59):868-79. doi: 10.1098/rsif.2010.0567. Epub 2011 Jan 5.
Abstract
We study the mechanics of pull-off of a barnacle adhering to a thin elastic layer which is bonded to a rigid substrate. We address the case of barnacles having acorn shell geometry and hard, calcarious base plates. Pull-off is initiated by the propagation of an interface edge crack between the base plate and the layer. We compute the energy release rate of this crack as it grows along the interface using a finite element method. We also develop an approximate analytical model to interpret our numerical results and to give a closed-form expression for the energy release rate. Our result shows that the resistance of barnacles to interfacial failure arises from a crack-trapping mechanism.
摘要
我们研究了附着在薄弹性层上的藤壶从刚性基底上脱落的力学机制。我们研究了具有橡实壳几何形状和坚硬、石灰质底板的藤壶。通过在底板和层之间的界面边缘裂纹的扩展来启动脱落。我们使用有限元方法计算了随着裂纹沿界面生长时的能量释放率。我们还开发了一个近似解析模型来解释我们的数值结果，并给出能量释放率的封闭形式表达式。我们的结果表明，藤壶对界面失效的抵抗力来自于裂纹捕获机制。
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