Mixed lubrication analysis consideration with large deformation

许多机械元件（轴颈轴承、柱塞泵等）在边缘处有较大变形的滑动接触。在本工程中，提出了考虑总变形的分析方法。讨论了不考虑表面粗糙度的精密接触有限元分析和表面粗糙度油膜压力下的微观接触分析及其结合。采用柱塞泵/电机中柱塞-缸接触条件下的分析模型。首先，我们在接触点附近处理了较小网格的有限元接触，讨论了接触压力或变形的适当网格尺寸。，然后计算考虑变形的油膜压力。油膜厚度的公式均为简单接触形状（圆形或圆柱形）的简单油膜分析(即。Ertl-Grubin理论)适用于活塞边缘等非简单形状。该方法适用于形状复杂或位移较大的单元处的EHL膜。实验检测、容量计位移测量、红外热镜接触面积测量目前正在进行测试，没有适用的结果。

Sliding contact at edge with large defomation in many mechanical elements (journal bearings, piston pumps , etc). Analysis method considering gross deformation for this problem is developed in this project. Precise contact FEM analysis without surface roughness, microscopic contact analysis at surface roughness oil film pressure and their comnination are Discussed.The analysis model under the conditions of piston-cylinder contact in piston pump/motor is used. First, we handle FEM contact with smaller mesh near contact point, to discuss the appropriate mesh size for contact pressure or deformation., then calculate oil film pressure considering deformation.. The fomulation of oil film thickness are for simple shape contact (circle or cylindrical) simple oil film analysis (ie. Ertl-Grubin theory) are for non-simple shape like the edge of piston. It is adapted method for EHL film at the element, which has complex shape or large displacement. Experimental examinations, measurement of displacement by capacity meter and contact area by IR thermalscope are testing now, so there is no applicable results.