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arXiv 1802.04017cond-mat.softcond-mat.stat-mech
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粘弹性材料的裂纹萌生

Crack initiation in viscoelastic materials

Yuval Mulla, Giorgio Oliveri, Johannes T. B. Overvelde, Gijsje H. Koenderink

摘要:

在粘弹性材料中,单独的短寿命键合共同导致机械阻力,该机械阻力是长寿命的但有限的,因为最终出现裂纹。在这里,我们提供了一个微观机制,裂纹出现的非线性局部键动力学。这一机制不同于固体中的裂纹萌生,后者是由弹性能和粘附能之间的竞争决定的。我们提供和数值验证的临界裂纹长度的依赖关系的键动力学和施加的应力的分析方程。

英文摘要:

In viscoelastic materials, individually short-lived bonds collectively result in a mechanical resistance which is long-lived but finite, as ultimately cracks appear. Here we provide a microscopic mechanism by which cracks emerge from the nonlinear local bond dynamics. This mechanism is different from crack initiation in solids, which is governed by a competition between elastic and adhesion energy. We provide and numerically verify analytical equations for the dependence of the critical crack length on the bond kinetics and applied stress.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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