热力耦合作用下复合材料沉头螺栓搭接结构渐进损伤研究

doi:10.19936/j.cnki.2096-8000.20220328.001

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (3): 5-14.DOI: 10.19936/j.cnki.2096-8000.20220328.001

• 基础研究 • 下一篇

热力耦合作用下复合材料沉头螺栓搭接结构渐进损伤研究

余芬¹, 刘国峰¹, 何振鹏¹, 金伟^2*, 黎柏春¹, 孙爱俊¹, 钱俊泽³, 张桂昌¹

1.中国民航大学航空工程学院,天津300300;
2.工业和信息化部装备工业发展中心,北京100846;
3.中国民航大学工程技术训练中心,天津300300

收稿日期:2021-07-09 出版日期:2022-03-28 发布日期:2022-04-24
通讯作者: 金伟(1986-),男,硕士,主要从事通用航空技术方面的研究,18801136122@126.com。
作者简介:余芬(1963-),女,教授,主要从事航空复合材料制造与修理方面的研究。
基金资助:
天津市教委自然科学项目(2018KJ240);中央高校基金(3122019075);中国民航大学实验技术创新基金(2020CXJJ57);天津市科技计划项目(20YDTPJC01720);国家自然科学基金联合基金项目(U1833108)

Progressive damage study of composite countersunk head bolt lap structures under thermal mechanical coupling

YU Fen¹, LIU Guo-feng¹, HE Zhen-peng¹, JIN Wei^2*, LI Bai-chun¹, SUN Ai-jun¹, QIAN Jun-ze³, ZHANG Gui-chang¹

1. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;
2. Equipment Industry Development Centre, Ministry of Industryand Information Technology, Beijing 100846, China;
3. Engineering Technology Training Center of Civil Aviation University of China, Tianjin 300300, China

Received:2021-07-09 Online:2022-03-28 Published:2022-04-24

摘要/Abstract

摘要： 本文对采用沉头螺栓连接的复合材料层合板的损伤扩展过程和强度进行了数值研究。建立一个新的三维渐进损伤模型,来预测在扭矩和温度的共同作用下复合材料沉头螺栓搭接结构的极限承载能力和渐进损伤扩展。该模型将考虑热应变的复合材料本构方程、失效准则和材料退化准则、温度诱导的刚度和强度修正参数整合到VUMAT子程序中,采用热力耦合方法进行准静态模拟。研究结果表明:渐进损伤模型能够准确地预测温度和螺栓扭矩对该搭接结构极限承载能力的影响,能够清晰地反映失效机理和损伤扩展过程。随着温度的升高,当扭矩超过15 N·m时,搭接结构的极限承载强度不断减小。层合板纤维损伤主要受0°方向载荷影响,层合板基体损伤主要受90°方向载荷影响,失效单元沿施载方向扩展至自由边界失效。

关键词: 复合材料, 沉头螺栓连接, VUMAT, 温度, 螺栓扭矩, 渐进损伤模型

Abstract: This paper presents a numerical study of the damage expansion process and strength of composite laminates with countersunk head bolted connections. A new three-dimensional progressive damage model is developed to predict the load carrying capacity and damage extension of composite countersunk bolt lap structures under the combined effects of temperature and bolt torque. The model integrates the composite constitutive equations considering thermal strain, failure and material degradation criteria, temperature-induced stiffness and strength correction parameters into the VUMAT subroutine, and quasi-static simulations using a thermal mechanical coupling approach. The results show that the progressive damage model can accurately predict the influence of temperature and bolt torque on the ultimate load carrying capacity of the lap joint structure, and can clearly reflect the failure mechanism and damage extension process. As the temperature rises, the ultimate load bearing strength of the lap structure decreases when the torque exceeds 15 N·m. The laminate fibre damage is mainly influenced by the 0° directional load, the laminate matrix damage is mainly influenced by the 90° directional load, and the failure unit extends along the applied load direction to the free boundary failure.

Key words: composite materials, countersunk bolt connection, VUMAT, temperature, bolt torque, progressive damage model

中图分类号:

TB332

余芬, 刘国峰, 何振鹏, 金伟, 黎柏春, 孙爱俊, 钱俊泽, 张桂昌. 热力耦合作用下复合材料沉头螺栓搭接结构渐进损伤研究[J]. 复合材料科学与工程, 2022, 0(3): 5-14.

YU Fen, LIU Guo-feng, HE Zhen-peng, JIN Wei, LI Bai-chun, SUN Ai-jun, QIAN Jun-ze, ZHANG Gui-chang. Progressive damage study of composite countersunk head bolt lap structures under thermal mechanical coupling[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(3): 5-14.

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热力耦合作用下复合材料沉头螺栓搭接结构渐进损伤研究

Progressive damage study of composite countersunk head bolt lap structures under thermal mechanical coupling

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