在压痕松弛测试中建立速率依赖性粘附的临时模型

Materials Pub Date : 2024-08-08 DOI:10.3390/ma17163944
I. Argatov, I. Lyashenko, V. L. Popov
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引用次数: 0

摘要

与速率相关的附着现象一直被认为是一个复杂的问题,迄今为止开发的基于物理学和力学的方法导致附着功与接触前速度之间的隐式分析关系难以在实践中实现。为了在球形压痕框架内解决这一问题,我们引入了名义点接触中的粘附松弛试验来估算随速率变化的粘附力。根据接触半径随时间演变的拉伸指数近似值,为粘附功和接触前速度之间的函数关系提出了一个相对简单的四参数模型,并将其拟合性能与已知的 Greenwood-Johnson 和 Persson-Brener 模型进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ad Hoc Modeling of Rate-Dependent Adhesion in Indentation Relaxation Testing
The phenomenon of rate-dependent adhesion has long been recognized as an intricate problem, and the so-far-developed physics and mechanics-based approaches resulted in analytical relations between the implicit form between the work of adhesion and the contact front velocity which are difficult to implement in practice. To address this issue in the framework of spherical indentation, the adhesion relaxation test in a nominal point contact is introduced to estimate the rate-dependent adhesion. Based on a stretched exponent approximation for the contact radius evolution with time, a relatively simple four-parameter model is proposed for the functional relation between the work of adhesion and the contact front velocity, and its fitting performance is compared to that of the known Greenwood–Johnson and Persson–Brener models.
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