复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (3): 66-70.DOI: 10.19936/j.cnki.2096-8000.20210328.010

• 应用研究 • 上一篇    下一篇

复合材料双搭接胶连接接头承载力计算中的胶层厚度问题

马毓1,2, 李永亮1,2   

  1. 1.重庆工商大学 机械工程学院,重庆400067;
    2.重庆工商大学 制造装备机构设计与控制重庆市重点实验室,重庆400067
  • 收稿日期:2020-07-14 出版日期:2021-03-28 发布日期:2021-04-30
  • 作者简介:马毓(1981-),男,博士,讲师,主要从事复合材料结构及应用方面的研究,54320197@qq.com。
  • 基金资助:
    重庆市自然科学基金项目(cstc2019jcyj-msxmX0088);重点实验室平台开放项目(KFJJ2018094)

ADHESIVE THICKNESS AND THE CARRYING CAPABILITY OF ADHESIVE DOUBLE-LAP COMPOSITE JOINT

MA Yu1,2, LI Yong-liang1,2   

  1. 1. College of Mechanical Engineering, Chongqing Technology and Business University, Chongqing 400067, China;
    2. Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control, Chongqing Technology and Business University, Chongqing 400067, China
  • Received:2020-07-14 Online:2021-03-28 Published:2021-04-30

摘要: 现有复合材料双搭接胶连接接头承载力计算公式只在有限的胶层厚度范围内适用,有修正必要。利用已有试验数据,解析分析了胶层厚度变化引起的接头承载力改变与其剪应力、剥离应力之间的关系,发现胶层增厚,接头承载力减小,胶层的剪应力和剥离应力均减小,剥离应力不是接头破坏的主要原因;同时,试件胶层没有明显缺陷,缺陷也不是接头破坏的主要原因。提出胶层增厚引起的胶层剪切性能改变是接头承载力减小的主要原因,可作为公式修正的思路。

关键词: 复合材料胶连接, 胶层厚度, 剪应力, 剥离应力, 承载力

Abstract: The calculation formula of carrying capabilty of adhesive double-lap composite joint had limitation, which was only applicable in certain adhesive thickness range and needed to be improved. In order to improve the formula, the shear stress and peel stress of adhesive layer along the overlap length were contrastively analyzed under experimental carrying capability and theoretical calculation load for analytical analysis. It is pointed out that the shear stress and peel stress decrease along with the adhesive thickness increases, so it does not affect the carrying capability. Also, it is not entirely appropriate to attribute the carrying capability reduction to defects. In addition, the deduction was put forwards that the change of shear property caused by the change of adhesive thickness is the main reason for the carrying capability reduction.

Key words: composite adhesive joints, adhesive thickness, shear stress, peel stress, carrying capability

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