力学与实践 ›› 2013, Vol. 35 ›› Issue (5): 63-68.DOI: 10.6052/1000-0879-12-412

• 应用研究 • 上一篇    下一篇

同种材料球板斜碰带电量研究

李桂宣, 谢莉   

  1. 西部灾害与环境力学教育部重点实验室, 兰州大学土木工程与力学学院, 兰州730000
  • 收稿日期:2012-11-14 修回日期:2013-02-25 出版日期:2013-10-08 发布日期:2013-10-22
  • 通讯作者: 谢莉,博士,主要研究方向为风沙环境力学.E-mail:xieli@lzu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(1121202;11072096;11272139).

CONTACT ELECTRIFICATION DUE TO THE OBLIQUE IMPACT OF CHEMICALLY IDENTICAL BALL AND PLATE

LI Guixuan, XIE Li   

  1. Key Laboratory of Mechanics on Western Disaster and Environment, College of Civil Engineering and Mechanics Lanzhou University, Lanzhou 730000, China
  • Received:2012-11-14 Revised:2013-02-25 Online:2013-10-08 Published:2013-10-22

摘要:

报道了同种材料球板斜碰带电量实验和理论研究, 发现同种材料球和板斜碰后球板会带电,带电量的极性与材料有关,带电量的大小与板的倾角有关,随着倾角的增大先增加后减小,当倾角约50°时,碰撞电量达到最大,是正碰撞电量的6~8 倍. 通过球板斜碰过程的动力学分析,发现球板碰撞后球的带电量与碰撞过程中球与板的摩擦面积成正相关.

关键词:

同种材料球板斜碰|碰撞角度|摩擦面积|接触电

Abstract:

In this paper, the experimental and theoretical studies are presented of the contact electrification due to the ball-plate oblique impact, in which the ball and the plate have same chemical properties. Experimental results show that the ball can be electrified after impacting with a plate of the same chemical property as the ball, while the polarity of charge depends on the ball's material property. The magnitude of charge is related to the inclination angle of plate. With the increase of the inclination angle, the magnitude of charge first increases and then decreases. When the inclination angle reaches 50 degree, the magnitude of charge reaches its maximum value, which is 6-8 times of the magnitude of charge due to the direct impact. By a dynamic analysis of the ball-plate oblique impact, it is shown that the charge carried by the ball is highly related to the friction area between the ball and the plate in collision.

Key words:

chemically identical ball-plate oblique impact|inclination angle|friction area|contact electrification

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