摘要翻译：
我们研究了弹性层在准静态端点载荷作用下的可逆解压缩（解压缩）力学。在微观层次上，该系统是由弹性颗粒链通过易碎弹簧与刚性基础相互作用来模拟的。从聚合物胶带的剥离，到细胞的滚动，壁虎纤维结构的工作和DNA的变性，这种系统可以被视为描述广泛现象的原型。我们构造了离散模型的一个严格的连续极限，它捕捉了稳定和亚稳态构型，并对弹性和内聚相互作用之间的相互作用进行了详细的参数研究。我们表明，该模型再现了实验观察到的从粘附前沿的增量演化到粘附层宏观部分的突然完全退去的突变。随着微观参数的变化，宏观响应由准韧性转变为准脆性，粘附滞后尺寸相应减小。在微尺度上，这对应于解码器前沿（畴壁）从“局域”到“扩散”结构的转变。当内部长度尺度远小于系统的尺寸时，我们得到了临界脱粘阈值在极限范围内的显式表达式。所实现的微观机构参数化控制可用于新型生物仿生粘附装置和机械的设计。
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英文标题：
《Mechanics of Reversible Unzipping》
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作者：
F. Maddalena, D. Percivale, G. Puglisi, L. Truskinovsky
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最新提交年份：
2009
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分类信息：

一级分类：Quantitative Biology        数量生物学
二级分类：Other Quantitative Biology        其他定量生物学
分类描述：Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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一级分类：Quantitative Biology        数量生物学
二级分类：Biomolecules        生物分子
分类描述：DNA, RNA, proteins, lipids, etc.; molecular structures and folding kinetics; molecular interactions; single-molecule manipulation.
DNA、RNA、蛋白质、脂类等；分子结构与折叠动力学；分子相互作用；单分子操作。
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英文摘要：
  We study the mechanics of a reversible decohesion (unzipping) of an elastic layer subjected to quasi-static end-point loading. At the micro level the system is simulated by an elastic chain of particles interacting with a rigid foundation through breakable springs. Such system can be viewed as prototypical for the description of a wide range of phenomena from peeling of polymeric tapes, to rolling of cells, working of gecko's fibrillar structures and denaturation of DNA. We construct a rigorous continuum limit of the discrete model which captures both stable and metastable configurations and present a detailed parametric study of the interplay between elastic and cohesive interactions. We show that the model reproduces the experimentally observed abrupt transition from an incremental evolution of the adhesion front to a sudden complete decohesion of a macroscopic segment of the adhesion layer. As the microscopic parameters vary the macroscopic response changes from quasi-ductile to quasi-brittle, with corresponding decrease in the size of the adhesion hysteresis. At the micro-scale this corresponds to a transition from a `localized' to a `diffuse' structure of the decohesion front (domain wall). We obtain an explicit expression for the critical debonding threshold in the limit when the internal length scales are much smaller than the size of the system. The achieved parametric control of the microscopic mechanism can be used in the design of new biological inspired adhesion devices and machines.
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PDF链接：
https://arxiv.org/pdf/0906.1477