Thermomechanical Modeling of Engineering Surfaces in Sliding Contact

滑动接触工程表面的热机械建模

• 批准号: 0084632
• 负责人: Andres Soom
• 金额: $ 14.99万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-15 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084632&HistoricalAwards=false
• 关键词: Thermomechanical; Modeling; Engineering; Surfaces; Sliding

0084632SoomIn modern engineering practice, systems and components that rely onfrictional response are ubiquitous. Clutches, brakes and rubbing sealsare well known examples from mechanical engineering. Despite the apparentsimplicity of the sliding contact problem, its economic importance, andthe efforts that have been devoted to research on this topic recentdecades, a detailed physical understanding of many aspects of behaviorremains elusive, particularly those associated with thermal effects. Inthis project, supported under the initiative on Exploratory Research on Model Based Simulation, we will develop a computational mechanics approach tomodeling these problems based on a multi-level boundary element methodwhich can be scaled up to solve large problems. An unsteadythree-dimensional thermomechanical formulation that includes surfacetexture and near-surface nonlinearities will be implemented. A speedor temperature dependent friction will be employed. The computationalmethods, while fully three-dimensional in nature, will initially beapplied to a series of rotating ring geometries that will be studied in aparallel program of physical experiments. The experiments will becompared with computational results based on full field deformationanalysis of a stationary ring or disc under both constant and unsteadysliding conditions. ***

[84632]在现代工程实践中，依赖摩擦响应的系统和部件无处不在。离合器、制动器和摩擦密封是机械工程中众所周知的例子。尽管滑动接触问题明显简单，其经济重要性，以及近几十年来致力于该主题研究的努力，但对行为的许多方面的详细物理理解仍然难以捉摸，特别是与热效应相关的方面。在本项目中，我们将在基于模型的仿真探索性研究计划的支持下，开发一种基于多级边界元方法的计算力学方法来建模这些问题，该方法可以扩展到解决大型问题。一个非定常三维热力学公式，包括表面纹理和近表面非线性将实现。将采用与速度或温度有关的摩擦。计算方法虽然在本质上是完全三维的，但将首先应用于一系列旋转的几何环，这些几何环将在物理实验的平行程序中进行研究。实验将与基于固定环或圆盘在恒定和非定常滑动条件下的全场变形分析的计算结果进行比较。＊＊＊