Normal Load of Internal Combustion Engine Junction Based on Fractal Theory of Thermal Elasto-Plastic Contact

被引：0
|
作者：
Feng Y. [1 ,2 ]
Yu X. [1 ]
Liu Z. [1 ]
机构：
[1] Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou
[2] School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou
来源：
| 2018年 / Chinese Society for Internal Combustion Engines卷 / 36期
关键词：
Fractal theory; Internal combustion engine; Normal load; Thermal elasto-plastic;
D O I：
10.16236/j.cnki.nrjxb.201803035
中图分类号：
学科分类号：
摘要：
Based on normal mechanics model of thermal elasto-plastic contact adopting anisotropic fractal geometrical theory, three parameters were used as argument, then the extended fractal model of thermal elasto-plastic contact of rough surfaces was established for the problem of ignoring the effect of surface roughness in mechanical parts modeling. The theoretical values of normal load in the internal combustion engine cylinder head-cylinder head gasket joints were calculated with constant properties and variable properties, respectively. Then, these theoretical values were analyzed and compared with simulation values which resulted from the four-body contact simplified model composed of cylinder head-cylinder head gasket-engine block-bolts. The results clearly show that in the cylinder ring near the two exhaust valves, whether considering the variable properties or not has a significant impact on the results. Contact surface roughness has an impact on the normal contact load. The results calculated from smooth surface finite element modeling has great deviation from the actual situation. © 2018, Editorial Office of the Transaction of CSICE. All right reserved.
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页码：267 / 273
页数：6
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