基于孔变形的复合材料连接件疲劳性能分析
Fatigue performance analysis of composite joints based on hole deformation
刘学术 1王学尧1
作者信息
- 1. 大连理工大学 运载工程与力学学部,大连 116033
- 折叠
摘要
在复合材料的实际应用中,以装配组件或紧固件失效作为复合材料螺栓连接失效的判定准具有极大的风险性.在分析复合材料疲劳损伤发展特点的基础上,本文提出了一种基于连接孔变形的螺接结构疲劳寿命预测方法,并以碳纤维复合材料双钉单剪及单钉双剪连接拉-拉疲劳性能实验数据对模型进行了验证.结果表明:连接孔的变形量能很好地反映连接结构疲劳损伤的发展过程,本文所提的疲劳寿命预测模型的最大误差不超过-3.62％,装配间隙的存在可导致连接件疲劳寿命下降高达64.8％.
Abstract
In the practical application of composite materials,using the failure of assembly components or faste-ners as a criterion for determining the failure of composite bolted joints brings great risks.After analysis of develop-ment characteristics of fatigue damage in composite materials,a method for predicting the fatigue life of composite bolted joints was proposed,which was based on the deformation of connection holes,and validated by using experi-mental data on tensile-tensile fatigue performance of double-bolt single-lap and single-bolt double-lap composite joints.The results show that the deformation of the connection hole can well reflect the development process of fatigue damage of the connection structure,and the maximum relative error of the fatigue life prediction model proposed in this paper does not exceed-3.62％.The existence of assembly gaps can lead to a decrease in the fatigue life of the connection member of up to 64.8％.
关键词
复合材料/螺栓连接/疲劳寿命/孔变形/装配间隙Key words
composites/bolted joints/fatigue life/hole deformation/assembly gap引用本文复制引用
基金项目
国家重点研发计划(2022YFB2503503)
出版年
2024
NETL
NSTL
万方数据