北京航空航天大学学报 ›› 2016, Vol. 42 ›› Issue (11): 2306-2320.doi: 10.13700/j.bh.1001-5965.2015.0694

• 论文 • 上一篇    下一篇

冲击位置对斜搭接接头冲击后拉伸性能的影响

聂恒昌1, 徐吉峰2, 关志东1, 黎增山1, 冀赵杰1, 谭日明1   

  1. 1. 北京航空航天大学 航空科学与工程学院, 北京 100083;
    2. 中国商飞 北京民用飞机技术研究中心, 北京 102211
  • 收稿日期:2015-10-26 修回日期:2016-01-15 出版日期:2016-11-20 发布日期:2016-03-15
  • 通讯作者: 关志东,Tel.:010-82338873,E-mail:zdguan@buaa.edu.cn E-mail:zdguan@buaa.edu.cn
  • 作者简介:聂恒昌,男,博士研究生。主要研究方向:飞机复合材料结构修理。Tel.:010-82338873,E-mail:nhc1991@126.com;关志东,男,博士,教授,博士生导师。主要研究方向:飞机复合材料结构设计。Tel.:010-82338873,E-mail:zdguan@buaa.edu.cn

Tensile behavior of scarf joints after impact in different locations

NIE Hengchang1, XU Jifeng2, GUAN Zhidong1, LI Zengshan1, JI Zhaojie1, TAN Riming1   

  1. 1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Beijing Aeronautical Science & Technology Research Institute, Commercial Aircraft Corporation of China, Ltd., Beijing 102211, China
  • Received:2015-10-26 Revised:2016-01-15 Online:2016-11-20 Published:2016-03-15

摘要: 低速冲击损伤对复合材料胶接结构的力学性能存在威胁。对在搭接区域3个不同位置承受低速冲击的斜搭接接头进行冲击后拉伸试验,并分别建立胶接接头冲击及冲击后拉伸有限元模型。试验结果表明:冲击位置在搭接区尖端背侧,造成的凹坑深度最大,冲击后拉伸强度最低;冲击位置在搭接区中部,凹坑深度最小,冲击后拉伸强度最大;冲击位置在搭接区尖端侧,凹坑深度及冲击后拉伸强度居中。有限元分析结果表明胶层损伤和复合材料纤维损伤的大范围扩展是导致结构失效的主要原因。

关键词: 复合材料结构, 斜搭接接头, 胶接连接, 低速冲击, 拉伸性能

Abstract: The damage introduced by low-velocity impact is a threat to composite bonded joints. Scarf joints were impacted in three different locations of joint areas and then tensile test after impact was conducted. Finite element models of impact and tensile after impact of scarf joints were established respectively. The test results demonstrate that when impact occurs at the back face of tips, the indentation depth is the largest and the tensile strength after impact is the lowest. When impact occurs at the middle of joint area, the indentation depth is the smallest and the tensile strength after impact is the highest. When impact occurs at the front face of tips, the indentation depth and tensile strength are medium. The finite element analysis results show that the major cause of structural failure is the extensive expansion of adhesive damage and fiber cracks.

Key words: composite structure, scarf joints, adhesively bonded joints, low-velocity impact, tensile behavior

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