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  HomeContents of Chinese Journal of Mechanical Engineering (English Edition),2008 No.2ANALYSIS ON THERMAL ELASTO- PLASTIC ASPERITY CONTACTS OF LAYERED MEDIA

TONG Ruiting

LIU Geng

ZENG Quanren

LIU Tianxiang
School of Mechatronic Engineering,
Northwestern Polytechnical University,
Xi’an 710072, China

 

 

ANALYSIS ON THERMAL ELASTO- PLASTIC ASPERITY CONTACTS OF LAYERED MEDIA* 

 

Abstract: A thermal elasto-plastic asperity contact model is investigated, which takes into account the steady-state heat transfer and the asperity distortion due to thermal elasto-plastic deformations. A hard coating and a soft coating are applied to study the correlations between contact area and contact pressure, average gap and contact pressure, coating thickness and contours of the contact stress distribution, etc. The effects of material properties, coating thickness, frictional coefficient, and the heat input combinations on the stress distribution are investigated and discussed. The frictional heat input increases the maximum value of von Mises stress. Finally, the appropriate thickness of the hard coating is also discussed. To protect the substrate, one can choose hard coating and the thickness of that is suggested that can be hc=70c Rm.

Key words: Thermal elasto-plastic contact Rough surfaces Coating

 


* This project is supported by National Natural Science Foundation of China (No. 50475146), Specialized Research Fund for the Doctoral Program of Higher Education of Ministry of Education, China (No. 20030699035), Natural Science Foundation of Shaanxi Province, China (No. 2004E225, No. 2005E226) and Northwestern Polytechnical University Foundation for Fundamental Research (NPU-FFR-20060500W018101). Received October 17, 2006; received in revised form November 22, 2007; accepted December 21, 2007

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Biographical notes

TONG Ruiting is currently a PhD candidate in School of Mechatronic Engineering, Northwestern Polytechnical University, China. He received his MS degree from Northwestern Polytechnical University, China, in 2007. His research interests include elasto-plastic mechanics, contact mechanics and multiscale method, etc.
Tel: +86-29-88493928-4; E-mail: nputrt@mail.nwpu.edu.cn

LIU Geng is currently a professor in School of Mechatronic Engineering, Northwestern Polytechnical University, China. He received his PhD degree from Xi’an Jiaotong University, China, in 1994. His research interests include dynamics of mechanical system, tribology, contact mechanics, biomechanics, multiscale method, etc.
Tel: +86-29-88460411; E-mail: npuliug@nwpu.edu.cn

ZENG Quanren is currently a PhD candidate in School of Mechatronic Engineering, Northwestern Polytechnical University, China. He received his MS degree from Northwestern Polytechnical University, China, in 2007. His research interests include elasto-plastic mechanics, contact mechanics and biomechanics, etc.
Tel: +86-29-88493928-4; E-mail: zengquanren@mail.nwpu.edu.cn

LIU Tianxiang received his PhD degree from Northwestern Polytechnical University, China, in 2006. His research interests include elasto-plastic mechanics, tribology, contact mechanics, multiscale method, and meshless method, etc.
Tel: +49-511-7623707; E-mail: nwpuliutx@hotmail.com


References


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