复合材料蜂窝夹芯结构紧固件连接拉脱失效行为研究

doi:10.19936/j.cnki.2096-8000.20211028.003

复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (10): 19-25.DOI: 10.19936/j.cnki.2096-8000.20211028.003

复合材料蜂窝夹芯结构紧固件连接拉脱失效行为研究

王汝¹, 王蔓², 白瑞祥^3*

1.浙江机电职业技术学院智能制造学院,杭州310053;
2.大连工业大学机械工程与自动化学院,大连116034;
3.工业装备结构分析国家重点实验室大连理工大学工程力学系,大连116024

收稿日期:2021-01-12 出版日期:2021-10-28 发布日期:2021-11-03
通讯作者: 白瑞祥(1972-),男,博士,副教授,主要从事复合材料及损失力学方面的研究,bairx@dlut.edu.cn。
作者简介:王汝(1989-),女,硕士,助教,主要从事复合材料及损伤力学方面的研究。
基金资助:
国家自然科学基金(11572070);浙江省教育厅一般科研项目(Y202044284)

Study on pull-out failure behavior of composite honeycomb sandwich fasteners

WANG Ru¹, WANG Man², BAI Rui-xiang^3*

1. Zhejiang Institute of Mechanical & Electrical Engineering , Hangzhou 310053, China;
2. School of Mechanical Engineering & Automation, Dalian Polytechnic University, Dalian 116034, China;
3. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China

Received:2021-01-12 Online:2021-10-28 Published:2021-11-03

摘要/Abstract

摘要： 结合数值仿真计算和试验研究,得到了复合材料蜂窝夹芯结构紧固件连接在拉脱载荷作用下的破坏形式及承载能力,揭示了相应的失效机理。介绍了复合材料夹层结构的刚度理论,并建立了有限元模型,数值预测了结构的失效模式与极限载荷,通过与试验结果的对比,证明了本文数值模拟方法的有效性。试验与数值计算结果均表明复合材料蜂窝夹芯结构的失效区域主要集中于连接区域,故为提高结构承载能力,尝试将连接区域的蜂窝挖空后进行灌封,并对此局部灌封形式的复合材料蜂窝夹芯结构进行数值计算,结果表明,采用对复合材料蜂窝夹芯结构连接区域蜂窝灌封的方式,其性能要优于挖空蜂窝灌封的结构,承载能力有显著提高。

关键词: 复合材料, 蜂窝夹芯, 拉脱, 灌封, 有限元分析

Abstract: The failure study of honeycomb sandwich structure still mainly depends on pull-out test currently. In this paper, the fracture form and carrying capacity of the composite honeycomb sandwich fastener connection under pull-out load are studied by experiment first, and the corresponding failure mechanism is revealed. But there is a need to quickly get the structure bearing capacity and failure form during designing and optimizing, in order to establish the finite element model. The stiffness theory of composite material panel and equivalent model of honeycomb sandwich is introduced. In this paper, the fracture mode and ultimate load of the structure are predicted numerically, and the results are compared with the test, which proves the validity of the numerical calculation method. Test and numerical calculation results indicate that the failure area of the composite honeycomb sandwich structure is mainly concentrated in the connection area. In order to improve the bearing capacity of the structure, the honeycomb in the connection area of the composite honeycomb sandwich structure is tried to be hollowed out and then sealed. Numerical calculations of the hollowed out honeycomb sealing structure are carried out. The performance of the local sealing composite honeycomb sandwich is better than that of the hollowed out honeycomb sealing structure, and the bearing capacity is significantly improved.

Key words: composite material, honeycomb sandwich, pull-out, sealing, finite element method

中图分类号:

TB332

王汝, 王蔓, 白瑞祥. 复合材料蜂窝夹芯结构紧固件连接拉脱失效行为研究[J]. 复合材料科学与工程, 2021, 0(10): 19-25.

WANG Ru, WANG Man, BAI Rui-xiang. Study on pull-out failure behavior of composite honeycomb sandwich fasteners[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(10): 19-25.

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复合材料蜂窝夹芯结构紧固件连接拉脱失效行为研究

Study on pull-out failure behavior of composite honeycomb sandwich fasteners

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