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首页> 外文期刊>トライボロジスト >Stochastic analysis on critical pressure in concept of mode transition from mild to severe wear by Burwell-Strang
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Stochastic analysis on critical pressure in concept of mode transition from mild to severe wear by Burwell-Strang

机译：Burwell-Strang 对从轻度磨损到重度磨损的模式转换概念中的临界压力进行随机分析

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摘要

The threshold of load condition from light to heavy that Burwell and Strang proposed in 1952 as a concept of the mode transition from mild to severe wear has been tried to be estimated considering isotropic and the Gaussian surface roughness. In brief, the threshold condition is expressed as the critical pressure at which the nominal contact area is wholly covered with the yielding area. This critical pressure has been calculated using stochastic rough surface contact theory and Johnson's Elastic-Plastic Indentation model. Individual summit of rough asperity has been assumed to be a sphericity and all of them to have the same radius. Then effect of some roughness parameters and hardness on the critical pressure have been studied, and the following results have been obtained: (1) Especially for light load, the decrease rate of the distance between a plastic contact point and adjacent to it with contact load is greater than the growth rate of plastic area at a contact point with contact load. (2) The critical pressure decreases with a decrease in roughness. (3) As material hardness become higher, the critical pressure become higher, in addition, the critical pressure is sensitive especially in low material hardness range.
机译：Burwell 和 Strang 在 1952 年提出的从轻到重的载荷条件阈值作为从轻度磨损到重度磨损的模式转换的概念，已经尝试考虑各向同性和高斯表面粗糙度来估计。简言之，阈值条件表示为标称接触面积完全被屈服面积覆盖的临界压力。该临界压力是使用随机粗糙表面接触理论和 Johnson 的弹塑性压痕模型计算得出的。粗略粗糙的单个山顶被假定为球形，并且它们都具有相同的半径。然后研究了部分粗糙度参数和硬度对临界压力的影响，得到以下结果：（1）特别是在轻载荷下，塑料接触点与其相邻接触点与接触载荷的距离减小率大于接触载荷接触点处塑性面积的增长率。（2）临界压力随粗糙度的降低而减小。（3）随着材料硬度的升高，临界压力也随之升高，此外，临界压力对临界压力敏感，特别是在材料硬度较低的范围内。

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