| Thermal contact conductance at continuous roll-casting interface |
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| 作者姓名： | 胡仕成 马维策 杜磊 李晓谦 钟掘 |
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| 作者单位： | School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | The effects of surface roughness, strain rate, friction coefficient and pressure on real contact area were analyzed based on the research of Stupkiewicz. The real contact area model taking account of the effect of friction and deformation of material was obtained. The model of contact conductance at the rolling interface was obtained by integrating the specific feature of heat transfer through the interface of continuous roll-casting. The results indicate that the real contact area increases obviously when the material is under yield, and the real contact area varies inversely with surface roughness, whereas it varies exponentially with friction coefficient, strain rate and pressure, and the power factor depends on strain rate.
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| 关 键 词： | 触点面积 应变率 压强 热量触点导率 |
| 收稿时间： | 28 June 2006 |
| 修稿时间： | 2006-06-282006-09-25 |
Thermal contact conductance at continuous roll-casting interface |
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| Hu Shi-cheng , Ma Wei-ce , Du Lei , Li Xiao-qian and Zhong Jue.Thermal contact conductance at continuous roll-casting interface[J].Journal of Central South University of Technology,2007,14(3):374-379. |
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| Authors: | Hu Shi-cheng Ma Wei-ce Du Lei Li Xiao-qian and Zhong Jue |
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| Affiliation: | School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The effects of surface roughness, strain rate, friction coefficient and pressure on real contact area were analyzed based on the research of Stupkiewicz. The real contact area model taking account of the effect of friction and deformation of material was obtained. The model of contact conductance at the rolling interface was obtained by integrating the specific feature of heat transfer through the interface of continuous roll-casting. The results indicate that the real contact area increases obviously when the material is under yield, and the real contact area varies inversely with surface roughness, whereas it varies exponentially with friction coefficient, strain rate and pressure, and the power factor depends on strain rate. |
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| Keywords: | real contact area strain rate pressure thermal contact conductance |
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