On the Evolution of Contact Patch Concept

Product Design, Robotics, Advanced Mechanical and Mechatronic Systems and Innovation Conference

工业技术（总论）;机械制造

Dehelean, L.M.^1 ; Dehelean, N.M.^1

Mechatronics Department, Politehnica University, Timisoara, Romania^1

关键词: Asymmetric geometry;    Contact phenomena;    Digital methods;    Engineering applications;    Gear power transmissions;    Hertzian contacts;    Physical contacts;    State of stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/514/1/012018/pdf
DOI  :  10.1088/1757-899X/514/1/012018

学科分类：工业工程学

来源: IOP

【 摘 要 】

The paper aims to highlight the evolution of the concept of physical contact between two technical bodies (machine parts). The most abstract situation occurs in antiquity when the necessary geometry concepts were created. Engineering applications from the industrial age have demanded higher performances. These have become possible through a continuous refinement of the theoretical models. The hertzian contact between two evolving parts, in general, and between the wheel and the rail, in particular, evolved and became extremely concrete and full of details that were once obscure. The contact patch between the wheel and the rail has today an asymmetric geometry correlated with the state of stress and the dynamics of the railway track. The use of digital methods for describing topologies can be a way to create a model closer to the dynamic state of wheel and rail contact. We also encounter the same contact phenomena in gear power transmission.