复合材料双搭接胶连接接头的承载力与胶层变形

doi:10.19936/j.cnki.2096-8000.20221128.006

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (11): 43-48.DOI: 10.19936/j.cnki.2096-8000.20221128.006

复合材料双搭接胶连接接头的承载力与胶层变形

马毓^1,2,3, 马斌^1,2, 陈希瑞^1,2

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;
3.重庆工商大学机器人与激光智能制造研究所,重庆400067

收稿日期:2021-11-03 出版日期:2022-11-28 发布日期:2022-12-30
作者简介:马毓(1981-),男,博士,实验师,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);重庆市基础与前沿研究计划项目(cstc2015jcyjA60001);重点实验室平台开放项目(KFJJ2018094)

The carrying capability of adhesive double-lap composite joint and the adhesive layer deformation

MA Yu^1,2,3, MA Bin^1,2, CHEN Xi-rui^1,2

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;
3. Smart Manufacture Institute of Robot and Laser, Chongqing Technology and Business University, Chongqing 400067, China

Received:2021-11-03 Online:2022-11-28 Published:2022-12-30

摘要/Abstract

摘要： 现有复合材料双搭接胶连接接头的承载力计算式,没有完全解决胶层厚度对接头承载力的影响问题,理论与实际相差较大,有改进必要。对此问题一般是基于胶层缺陷和剥离应力讨论其原因。引用已有试验数据,解析分析了只变化胶层厚度的同种接头,在其破坏荷载作用下,胶层剪切变形与剥离变形沿搭接长度的分布规律;发现随着胶层增厚与接头承载力降低,胶层的剪切变形和剥离变形均减小;对比试件的特征破坏模式,也未发现剥离破坏特征和明显缺陷。提出控制胶层厚度,引起胶层剪切应变能密度改变,是上述问题的根本原因,并设计5组对比实验初步验证了此判断。

关键词: 胶连接, 胶层厚度, 剪应变, 剥离变形, 剪切应变能密度

Abstract: The carrying capability calculation formula of adhesive double-lap composite joint has limitation, which could not completely describe the relationship between the adhesive thickness and the carrying capability. It is believed generally that the reason are defects and peel effect. Based on the existing test data, we contrastively analyzed the shear deformation and peel deformation of adhesive layer along the overlap length in the joint for different adhesive thicknesses. It is found that the carrying capability decreases, the shear deformation and peel deformation decrease along with the adhesive thickness increase. Also no peel damage and obvious defect was found. The deduction is put forwards that the main reason for the discrepancy between theory and practice is the change of the adhesive layer shearing strain energy density for controlling the adhesive thickness, and it was preliminary proved by 5 groups contrast experiments.

Key words: adhesive joint, adhesive thickness, shearing strain, peel deformation, shearing strain energy density

中图分类号:

TB332

马毓, 马斌, 陈希瑞. 复合材料双搭接胶连接接头的承载力与胶层变形[J]. 复合材料科学与工程, 2022, 0(11): 43-48.

MA Yu, MA Bin, CHEN Xi-rui. The carrying capability of adhesive double-lap composite joint and the adhesive layer deformation[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(11): 43-48.

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复合材料双搭接胶连接接头的承载力与胶层变形

The carrying capability of adhesive double-lap composite joint and the adhesive layer deformation

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