垫片尺寸对碳纤维复合材料螺栓连接单搭接挤压强度影响研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (5): 53-62.

垫片尺寸对碳纤维复合材料螺栓连接单搭接挤压强度影响研究

张新异¹, 孔海娟^1,3*, 胡之峰², 孙泽玉²

1.上海工程技术大学材料工程学院,上海201620;
2.东华大学轻质结构复合材料上海市重点实验室,上海201620;
3.上海工程技术大学上海市激光先进制造技术协同创新中心,上海201620

收稿日期:2019-08-29 出版日期:2020-05-28 发布日期:2020-05-28
通讯作者: 孔海娟(1985-),女,讲师,博士,主要研究方向为高性能纤维及其复合材料,konghaijuan@sues.edu.cn。
作者简介:张新异(1995-),男,研究生,主要研究方向为碳纤维复合材料连接。
基金资助:
国家自然基金青年基金(51603120);上海汽车工业科技发展基金(1715);上海市高校教师产学研践习计划(SDJH304)

EFFECT OF WASHER SIZE ON BEARING STRENGTH OF SINGLE-LAPBOLT JOINT IN CARBON FIBER REINFORCED COMPOSITES

ZHANG Xin-yi¹, KONG Hai-juan^1,3*, HU Zhi-feng², SUN Ze-yu²

1.School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;
2.Shanghai Key Lab of Lightweight Composite, Donghua University, Shanghai 201620, China;
3.Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology,Shanghai 201620, China

Received:2019-08-29 Online:2020-05-28 Published:2020-05-28

摘要/Abstract

摘要： 针对碳纤维复合材料单搭接螺栓连接结构,研究不同垫片外径对螺栓连接的挤压强度及损伤的影响,并仿真分析其失效模式。发现在单搭接螺栓连接结构中,加入垫片可以提高连接的挤压强度,且强度随着垫片外径尺寸的增加而增加。当垫片外径从11.8 mm逐渐增加到13.8 mm 、15.8 mm和17.8 mm时,挤压强度分别在前一基础上提升了5.76%、5.87%和2.4%。试验结果表明垫片外径增加到一定程度时,挤压强度的增强效应开始减弱,但对失效模式并没有影响,仍为挤压失效模式。在Abaqus有限元软件中建立碳纤维复合材料单搭接螺栓连接三维有限元模型,引入含拉伸分层损伤、压缩分层损伤的三维Hashin准则和改进了的Tan、Tserpes材料刚度退化模型,仿真得到的载荷-位移曲线和失效模式与试验结果相吻合。

关键词: 碳纤维复合材料, 垫片, 有限元, 挤压强度

Abstract: An experimental study of the diameter size of washer on the bearing strength and failure of carbon fiber reinforced composites single-lap bolt joints were investigated. It was found that the bearing strength of single lap bolt joint was improved by the increasing of diameter of the washer. When the diameter of the washer is gradually increased from 11.8 mm to 13.8 mm, 15.8 mm, 17.8 mm, the bearing strength is gradually increased by 5.76%, 5.87%, 2.4% accordingly. However, the experimental results show that when the diameter of the washer increases to a certain extent, the effect of strengthening the bearing strength is weakened. But there was no effect on the failure mode, and the failure mode is still the extrusion failure mode. A 3D model of carbon fiber reinforced composite laminates with bolt joint is created by using the software Abaqus. The 3D Hashin failure criteria with tensile delamination damage and compression delamination damage and the improved material stiffness degradation model of Tan and Tserpes were introduced. The simulated model captures the experimentally obtained results with error less than 10%, and predicts the failure modes successfully.

Key words: carbon fiber reinforced composites, washer, finite element, bearing strength

中图分类号:

TB332

张新异, 孔海娟, 胡之峰, 孙泽玉. 垫片尺寸对碳纤维复合材料螺栓连接单搭接挤压强度影响研究[J]. 复合材料科学与工程, 2020, 0(5): 53-62.

ZHANG Xin-yi, KONG Hai-juan, HU Zhi-feng, SUN Ze-yu. EFFECT OF WASHER SIZE ON BEARING STRENGTH OF SINGLE-LAPBOLT JOINT IN CARBON FIBER REINFORCED COMPOSITES[J]. Composites Science and Engineering, 2020, 0(5): 53-62.

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