摘要
GW干接触模型存在5个缺陷。当相糙峰高度的概率密度为Gauss分布时,给出了数学期望接触点数、总接触面积、总载荷、总电导的严格解析解,采用软件Maple计算了抛物柱面函数。实例计算表明接触点数与载荷近似成凸弧形直线正比例关系;量纲一的间距是联系接触点数、总接触面积、总载荷、总电导的纽带,它依赖名义压应力,但对名义压应力的变化不敏感;接触面积与载荷很接近直线正比例关系,在弹性接触条件下存在一个准"弹性接触硬度",接触压应力等于准弹性接触硬度,名义面积对接触面积几乎无影响。
GW dry contact model has 5 shortcomings. Exact analytic solutions for the mathematical expected contact spot number,total contact area,total load and total conductance were given when the as- perity heights follow a Ganssian distribution. The evaluation of paroAalic cylinder function＇ was carried out by employing software Maple. Calculations show that contact spot number is approximately protrusive-arc proportional to the load. The dimensionless separation ,which depends on but is not very sensitive to the nominal pressure ,becomes a link that relates contact spot number,total contact area,total load and total conductance. The contact area is almost ex^tly praportional to the load. Therefore there is a quasi-＂elastic contact hardness＂ under elastic condition where the contact pressure is equal to quasi-elastic contact hardness. The nominal area has nearly no influence on the contact area.
出处
《机械设计与制造》
北大核心
2010年第1期225-227,共3页
Machinery Design & Manufacture
基金
三峡大学青年科学基金(ZJX200605)
关键词
GW干接触模型
表面间距
准弹性接触硬度
半球赫兹正应力
单个粗糙峰
GW dry contact model
Surface separation
Quasi-elastic contact hardness
Hemi-spherical hertzian normal pressure
Individual asperity
