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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >RELATING SURFACE ROUGHNESS TO SUBSURFACE STRESS
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RELATING SURFACE ROUGHNESS TO SUBSURFACE STRESS

机译：将表面粗糙度与亚表面应力相关

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摘要

Understanding and anticipating the effects of surface roughness on subsurface stress in the design phase can help ensure that performance and life requirements are satisfied. The specific approach taken in this work to address the goal of improved surface design is to relate surface characteristics of real, machined surfaces to subsurface stress fields for dry contact. This was done by digitizing machined surfaces, simulating point contact numerically, calculating the corresponding subsurface stress field, and then relating stress results back to the surface. The relationship between surface characteristics and subsurface stress is evaluated using several different approaches including analyses of trends identified through stress field visualization and extraction of statistical data. One such approach revealed a sharp transition between cases in which surface characteristics dominated the stress field and those in which bulk, or global contact effects dominated the stress. This transition point was found to be a function of the contact operating conditions, material properties, and most interestingly, the roughness of the surface.
机译：在设计阶段了解并预测表面粗糙度对次表面应力的影响可以帮助确保满足性能和寿命要求。这项工作中为解决改进的表面设计目标而采取的特定方法是将真实的机加工表面的表面特性与亚表面应力场进行干接触。这是通过将加工的表面数字化，数值模拟点接触，计算相应的地下应力场，然后将应力结果关联回表面来完成的。使用几种不同的方法来评估表面特征与地下应力之间的关系，这些方法包括分析通过应力场可视化确定的趋势以及提取统计数据。一种这样的方法揭示了在表面特征主导应力场的情况与体积或整体接触效应主导应力的情况之间的急剧转变。发现该转变点是接触操作条件，材料特性以及最有趣的是表面粗糙度的函数。

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