摘要
在边界润滑条件下 ,当接触表面的液体不足以形成稳定的润滑膜 ,此时研究接触特性不同于弹流润滑。液体渗入到表面裂纹中必然对裂纹的扩展产生影响。本文用线弹性断裂力学理论 ,采用液 -力耦合二维有限元方法分析了滚动接触微观裂纹受力状态 ,研究了在不同润滑剂特性影响下裂纹尖端应力强度因子的变化趋势 ,同时考虑了裂纹倾斜角和摩擦系数变化的因素 ,阐明了润滑剂对表面微观裂纹尖端及接触区域的影响。
When there is not enough liquid on contact surface to produce film under boundary lubrication, the model can be described as that liquid fill in a crack and it cant be expelled from the crack Mechanism for different type of lubrication materials acting on crack tip due to contact pressures and tangential forces at surface is studied Finite element method software ANSYS 5 7 was used to calculate the stress distribution by the coupling fluid-structure analysis The area around the crack front satisfies the assumptions of linear elastic fracture mechanics (LEFM) Crack angle inclined to the surface and friction coefficient between contact surfaces were considered too The simplified numerical calculating method is applied to investigate the influence of lubrication material on crack
出处
《润滑与密封》
CAS
CSCD
北大核心
2002年第6期4-5,8,共3页
Lubrication Engineering
基金
国家自然科学基金资助项目 (5 993 5 10 0 )
关键词
接触疲劳裂纹
有限元
边界润滑
液-力耦合
润滑剂
Finite Element Method Boundary Lubrication Coupling Fluid-Structure Analysis
