耦合基体变形与微凸体相互作用的结合面刚度模型

doi:10.3901/JME.2022.09.190

机械工程学报 ›› 2022, Vol. 58 ›› Issue (9): 190-199.doi: 10.3901/JME.2022.09.190

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耦合基体变形与微凸体相互作用的结合面刚度模型

王晶晶, 李玲, 孙立泰, 张锦华, 蔡安江

西安建筑科技大学机电工程学院西安 710055

收稿日期:2021-11-09 修回日期:2022-02-26 出版日期:2022-05-05 发布日期:2022-06-23
通讯作者: 李玲(通信作者)，男，1981年出生，博士，教授。主要研究方向为机床动力学、接触力学和摩擦学。E-mail：lee_liling@163.com E-mail:lee_liling@163.com
作者简介:王晶晶，男，1996年出生，博士研究生。主要研究方向为螺栓结合面理论建模和摩擦动力学。E-mail：lee_wjj@163.com
基金资助:
国家自然科学基金(51975449)和陕西省重点研发计划(2021GY-309)资助项目

Stiffness Model of Joint Surface Based on Coupling of Substrate Deformation and Asperity Interaction

WANG Jingjing, LI Ling, SUN Litai, ZHANG Jinhua, CAI Anjiang

School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055

Received:2021-11-09 Revised:2022-02-26 Online:2022-05-05 Published:2022-06-23

摘要/Abstract

摘要： 针对螺栓结合面，提出一种新的弹塑性接触刚度建模方法。该模型不仅延续了微凸体具有连续光滑接触特性的思想，还揭示了基体变形和微凸体相互作用的耦合关系，提出一种新的弹塑性接触刚度建模方法。首先，根据多尺度理论和数理统计方法，建立了具有连续光滑接触特性的结合面法向接触模型；然后，通过建立单个微凸体-基体系统模型和多微凸体接触模型，探究了基体变形和微凸体相互作用的作用机理和耦合关系，并对结合面接触模型进行修正；最后，对比仿真结果和已有实验数据，验证了修正模型的正确性，并分析了基体变形和微凸体相互作用的影响程度。仿真结果表明：基体变形不仅影响了微凸体的接触变形，还会进一步引起微凸体间相互作用的发生；微凸体相互作用使得微凸体高度分布发生偏移，导致结合面局部高度平面下移；相比于基体变形，微凸体相互作用对接触刚度的影响显著，但表面粗糙度的影响依旧占主导地位。

关键词: 结合面, 接触刚度, 基体变形, 微凸体相互作用, 耦合方法

Abstract: A new elastoplastic contact stiffness modeling method for the bolt joint surface is proposed for the bolt joint surface. This model not only continues the idea that the asperities have continuous and smooth contact characteristics, but also reveals the coupling relationship between the substrate deformation and the asperity interaction. First, the normal contact model of the joint surface with continuous smooth contact characteristics is established through multi-scale theory and mathematical statistics. Then, a single asperity-substrate system model and a multi-asperity contact model are established to explore the mechanism and coupling relationship between substrate deformation and asperity interaction. Furthermore, the joint surface contact model is revised. Finally, the simulation results are compared with the existing experimental data to verify the correctness of the modified model and analyze the influence of substrate deformation and asperity interaction. The simulation results show that the substrate deformation not only affects the contact deformation of the asperities, but is also the direct cause of the asperity interaction. The asperity interaction makes the height distribution of the asperities deviate, resulting in the lowering of the local height plane of the joint surface. Compared with the substrate deformation, the asperity interaction has a significant influence on the contact stiffness, but the influence of the surface roughness is still dominant.

Key words: joint surface, contact stiffness, substrate deformation, asperity interaction, coupling method

中图分类号:

TG502
O3443

王晶晶, 李玲, 孙立泰, 张锦华, 蔡安江. 耦合基体变形与微凸体相互作用的结合面刚度模型[J]. 机械工程学报, 2022, 58(9): 190-199.

WANG Jingjing, LI Ling, SUN Litai, ZHANG Jinhua, CAI Anjiang. Stiffness Model of Joint Surface Based on Coupling of Substrate Deformation and Asperity Interaction[J]. Journal of Mechanical Engineering, 2022, 58(9): 190-199.

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耦合基体变形与微凸体相互作用的结合面刚度模型

Stiffness Model of Joint Surface Based on Coupling of Substrate Deformation and Asperity Interaction

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