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arXiv 0705.1834cond-mat.stat-mechcond-mat.mtrl-sci
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玻璃成型系统的力学性能

Mechanical Properties of Glass Forming Systems

Valery Ilyin, Nataliya Makedonska, Itamar Procaccia, Nurith Schupper

摘要:

我们解决了有趣的温度范围内的玻璃形成系统的机械性能之间的液体和固体。我们采用了一种有效的蒙特卡罗方法来计算弹性模量,并表明,在这个温度范围内的模量是有限的短时间和消失的长时间,其中“短”和“长”取决于温度。通过调用统计力学的一些精确结果,我们提供了一种替代的方法来计算剪切模量使用分子动力学模拟,并比较这些Monte-Carlo方法。最后的结论是,这些系统不是“粘性流体”在通常意义上,因为它们的实际时间依赖性连接固体状材料与不同的局部剪切模量。

英文摘要:

We address the interesting temperature range of a glass forming system where the mechanical properties are intermediate between those of a liquid and a solid. We employ an efficient Monte-Carlo method to calculate the elastic moduli, and show that in this range of temperatures the moduli are finite for short times and vanish for long times, where `short' and `long' depend on the temperature. By invoking some exact results from statistical mechanics we offer an alternative method to compute shear moduli using Molecular Dynamics simulations, and compare those to the Monte-Carlo method. The final conclusion is that these systems are not "viscous fluids" in the usual sense, as their actual time-dependence concatenates solid-like materials with varying local shear moduli.

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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