Critical Maximum Contact Pressure for Yielding in Hard Coating under Sliding Contact
In order to design the best combination of the coating and the substrate for preventing the yield, the semi-analytical method (SAM) was used to analyze the von Mises stress distributions in the contact system, and calculate the critical maximum contact pressure for yielding at the interface and surface in hard coating under both normal and tangential loads on three-dimensional elastic half space. From the results, it can be concluded that, to obtain a higher maximum critical contact pressure for the yield at the interface, increasing the substrate hardness and the ratio value of the coating thickness to the Hertzian contact radius(t/a0) is more effective when t/a0 is larger than 0.5 while increasing the substrate hardness or making the friction coefficient smaller is better when t/a0 is very small; to prevent yielding at the surface, choosing a relatively lower friction system or increasing the yield strength ratio of the coating to the substrate(Yf/Yb) will be effective.
hard coating sliding contact contact pressure three-dimension yield semi-analytical method
Zhang Pengyu Diao Dongfeng Wang Zhanjiang
Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xian Jiaotong Univ State Key Laboratory of Mechanical Transmission,.Chongqing University, Chongqing 400030, China
国际会议
西安
英文
239-242
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）