薄板复合材料螺栓连接强度与损伤分析

doi:10.19936/j.cnki.2096-8000.20251128.002

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (11): 8-19.DOI: 10.19936/j.cnki.2096-8000.20251128.002

薄板复合材料螺栓连接强度与损伤分析

李杰^1,2, 包祖国^2,3, 李琦¹, 孙晓旺¹, 周强⁴, 王显会^1*

1.南京理工大学机械工程学院,南京 210000;
2.长三角先进材料研究院材料大数据平台,苏州 215000;
3.南京工业大学先进轻质高性能材料研究中心,南京 210000;
4.内蒙古第一机械集团股份有限公司科研所,包头 014000

收稿日期:2024-09-05 出版日期:2025-11-28 发布日期:2025-12-24
通讯作者: 王显会(1968—),男,教授,博士生导师,研究方向为特种车辆防护结构设计,13770669850@139.com。
作者简介:李杰(2000—),男,硕士研究生,研究方向为车辆复合材料结构设计。
基金资助:
国家自然科学基金(52272370);江苏省创新能力建设专项资金(第一批)项目(BM2021007)

Research on the strength and damage of bolted joint of thin plate composites

LI Jie^1,2, BAO Zuguo^2,3, LI Qi¹, SUN Xiaowang¹, ZHOU Qiang⁴, WANG Xianhui^1*

1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210000, China;
2. Material Big Data Platform, Yangtze Delta Region Institute of Advanced Materials, Suzhou 215000, China;
3. Key Laboratory for Light-weight Materials, Nanjing Tech University, Nanjing 210000, China;
4. Scientific Research Institute, Inner Mongolia First Machinery Group Corporation, Baotou 014000, China

Received:2024-09-05 Online:2025-11-28 Published:2025-12-24

摘要/Abstract

摘要： 本文通过试验和仿真分析研究了薄板复合材料螺栓连接结构在拉伸载荷下的强度与损伤过程。首先,通过常规力学性能试验测得复合材料基础性能参数,然后对不同预紧力、不同铺层方式和单双螺栓分布的薄板复合材料连接件进行试验。基于刚度连续退化模型和三维Hashin失效准则,通过测试搭接板间的摩擦力反求螺栓预紧力,并采用降温等效法来模拟螺栓的预紧力,再对开孔板进行试验与仿真的标定,最终建立复合材料层合板螺栓连接的三维有限元模型,对薄板复合材料连接件的强度和损伤机理进行渐进失效分析。结果表明:随着螺栓预紧力增大,薄板复合材料连接件峰值载荷增大,断裂位移减小;不同铺层方式的薄板复合材料连接件损伤过程和其铺层比例有关;横向双螺栓连接件极限载荷约为单螺栓连接件极限载荷的两倍,纵向双螺栓连接件极限载荷稍低于该水平。

关键词: 薄板复合材料, 螺栓连接, 渐进失效, 损伤过程

Abstract: In this paper, the strength and damage process of composite thin plate bolted joint structures under tensile loading are investigated by experimental and simulation analysis. Firstly, the basic performance parameters of the composites were obtained by standard mechanical tests, and then tests were carried out on thin-plate composite joints with varying bolt preloads, different layup configurations, and both single and double bolt distributions. Based on the stiffness continuous degradation model and the three-dimensional Hashin failure criterion, the bolt preload was reverse-calculated by testing the friction between the overlap plates, and the preload of the bolt was simulated using an equivalent cooling method. Calibration of the open-hole plate was performed through both experiments and simulations, leading to the development of a three-dimensional finite element model of the bolted composite laminate. Finally, a progressive failure analysis was conducted to understand the strength and damage mechanisms of the composite plate joints. The results indicated that: with the increase of bolt preload, the peak load of the thin plate composite joint increases and the fracture displacement decreases; the damage process of the thin plate composite joints with different layups is related to the proportion of their layups; the ultimate load of transverse double-bolt joints is approximately twice as much as that of the single-bolt joints, and the ultimate limit of longitudinal double-bolt joints is slightly lower.

Key words: thin plate composites, bolted joint, progressive failure, damage process

中图分类号:

TB332

李杰, 包祖国, 李琦, 孙晓旺, 周强, 王显会. 薄板复合材料螺栓连接强度与损伤分析[J]. 复合材料科学与工程, 2025, 0(11): 8-19.

LI Jie, BAO Zuguo, LI Qi, SUN Xiaowang, ZHOU Qiang, WANG Xianhui. Research on the strength and damage of bolted joint of thin plate composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(11): 8-19.

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薄板复合材料螺栓连接强度与损伤分析

Research on the strength and damage of bolted joint of thin plate composites

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