螺栓结合面微观接触模型

doi:10.3901/JME.2016.07.205

机械工程学报 ›› 2016, Vol. 52 ›› Issue (7): 205-210.doi: 10.3901/JME.2016.07.205

• 数字化设计与制造 • 上一篇

螺栓结合面微观接触模型

李玲¹, 蔡安江¹, 蔡力钢², 阮晓光¹

1．西安建筑科技大学机电工程学院西安 710055;
2．北京工业大学机械工程与应用电子技术学院北京 100124

出版日期:2016-04-05 发布日期:2016-04-05
作者简介:李玲(通信作者),男,1981年出生,副教授。主要研究方向为数字化设计与制造。E-mail：lee_liling@163.com;蔡安江,男,1965年出生,教授。主要研究方向为数字化设计与制造和制造业信息化及集成。E-mail：lgcai321@yahoo.com.cn
基金资助:
国家自然科学基金(51305327,51475352)、高等学校博士学科点专项科研基金 (20136120120020)和陕西省自然科学基金(2014JQ7270)资助项目

Micro-contact Model of Bolted-joint Interface

LI Ling¹, CAI Anjiang¹, CAI Ligang², RUAN Xiaoguang¹

1. School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055;
2. College of Mechanical & Electrical Engineering, Beijing University of Technology, Beijing 100124

Online:2016-04-05 Published:2016-04-05

摘要/Abstract

摘要： 针对螺栓结合面弹塑性区域内的接触机理难以确定问题,根据在变形状态转变的临界点处微凸体真实接触面积与接触载荷转化均满足连续和光滑条件,构造新的多项式函数来描述接触变形与接触面积之间的关系。利用统计学方法建立螺栓结合面真实接触面、接触载荷与接触刚度模型。理论计算结果表明：随着平均表面距离的减少,接触载荷、接触面积和接触刚度随之增加;接触面积和接触刚度,随着接触载荷的增加而增加,当接触载荷增加一定程度后接触刚度和接触面积值分别趋于理想接触刚度和名义接触面积值;当螺栓结合面处于弹性和弹塑性接触状态时,塑性指数越大,接触面积越大,而平均接触距离和接触刚度就越小,当处于完全塑性状态时,塑性指数越大,刚度和平均接触距离就越大,而真实接触面积影响较小。

关键词: 弹塑性接触模型, 接触力学, 螺栓结合面, 统计学方法, 微凸体

Abstract: The contact mechanism of bolted-joint interface in elastic-plastic deformation regime is difficult to determine. Acrooding to the contact mechanics and the assumption that the transition from elastic to fully plastic deformation of a contacting asperity is continuous and smooth, the new polynomial function is constructed to describe the relationship between contact deformation and real contact area in elastic-plastic contact regime. The real area of contact, contact load and contact stiffness model are developed based on statistical method. Theoretical calcutaion results show that contact load, real contact area and contact stiffness increases as the mean surface separation decrease. The real contact area and contact stiffness increases with the increases of the contact load, especially, the value of contact stiffness and real contact area approached to ideal contact stiffness and nominal contact area when the contact load increases to a certain extent, respectively. The real contact area increases as plasticity indices increases, and mean surface separation and contact stiffness decrease in the elastic and elastoplastic deformation regime. The mean surface separation and contact stiffness increases as plasticity indices increases, and real contact area decreases in the fully plastic deformation regime.

Key words: asperity, bolted-joint interface, contact mechanics, elastic-plastic contact model, statistical method

中图分类号:

TH113

李玲, 蔡安江, 蔡力钢, 阮晓光. 螺栓结合面微观接触模型[J]. 机械工程学报, 2016, 52(7): 205-210.

LI Ling, CAI Anjiang, CAI Ligang, RUAN Xiaoguang. Micro-contact Model of Bolted-joint Interface[J]. Journal of Mechanical Engineering, 2016, 52(7): 205-210.

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螺栓结合面微观接触模型

Micro-contact Model of Bolted-joint Interface

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