Meeting the Contact-Mechanics Challenge
Meeting the Contact-Mechanics Challenge
复制标题
DOI：
10.1007/s11249-017-0900-2
复制
发表时间：
2017-12-01
影响因子：
3.2
通讯作者：
Greenwood, James A.
中科院分区：
文献类型：
--
作者：
Mueser, Martin H.;Dapp, Wolf B.;Greenwood, James A.
本文总结了最近宣布的接触力学建模挑战的提交情况。任务是解决一个典型的，虽然数学上完全定义的问题之间的粘附名义上平坦的表面。粗糙的刚性基底的表面形貌、压头的弹性特性以及压头和基底之间的短程粘附力被指定，使得不同的感兴趣的量，例如，可以计算给定载荷下的界面应力分布或作为载荷函数的平均间隙，并与参考解进行比较。许多不同的解决方案策略被追求，从传统的基于粗糙度的模型，通过汤姆逊理论和蛮力计算方法，以真实的实验室实验和模型的全原子分子动力学模拟，其中原始分配被缩小到原子尺度。虽然每个提交包含满意的答案至少一个子集的问题，效率，通用性和准确性不同的方法，更精确的方法，一般来说，计算更复杂。本文的目的是为理论家和实验家提供基准，以决定哪种方法是最适合于特定的应用程序，并衡量与每一个相关的错误。
This paper summarizes the submissions to a recently announced contact-mechanics modeling challenge. The task was to solve a typical, albeit mathematically fully defined problem on the adhesion between nominally flat surfaces. The surface topography of the rough, rigid substrate, the elastic properties of the indenter, as well as the short-range adhesion between indenter and substrate, were specified so that diverse quantities of interest, e.g., the distribution of interfacial stresses at a given load or the mean gap as a function of load, could be computed and compared to a reference solution. Many different solution strategies were pursued, ranging from traditional asperity-based models via Persson theory and brute-force computational approaches, to real-laboratory experiments and all-atom molecular dynamics simulations of a model, in which the original assignment was scaled down to the atomistic scale. While each submission contained satisfying answers for at least a subset of the posed questions, efficiency, versatility, and accuracy differed between methods, the more precise methods being, in general, computationally more complex. The aim of this paper is to provide both theorists and experimentalists with benchmarks to decide which method is the most appropriate for a particular application and to gauge the errors associated with each one.