复合材料科学与工程Issue(11)：43-49,7.DOI:10.19936/j.cnki.2096-8000.20241128.005
基于逐层失效模式的复合材料层合板随机振动疲劳寿命预测
Random vibration fatigue life prediction of composite laminates based on successive ply failure mode
沙梓祥 1蹇越傲 1蔡登安 1周光明1
作者信息
- 1. 南京航空航天大学 航空航天结构力学及控制全国重点实验室,南京 210016
- 折叠
摘要
Abstract
The random vibration fatigue life of composite laminates was studied by combining experimental and simulation methods.Vibration fatigue tests were conducted on composite laminates using a vibration table,and the natural frequency of the laminates was monitored and tracked in real-time using a laser vibration meter to obtain the random vibration fatigue life of the laminates.The finite element numerical analysis model is established.Under the random excitation,the equivalent stress power spectral density function of the random vibration of the structure is obtained.Combined with the Dirlik probability density function,the fatigue life of the laminated plate in the case of single-layer failure is obtained.The failure process of the laminated plate is simulated as the process of stiffness degradation layer by layer,continuous redistribution of stress,continuous accumulation of damage,and final overall failure.The result indicates that the error between the finite element calculation life results and the vibration fatigue test results is within the allowable range of engineering.This article can provide a feasible method for further experi-mental research on vibration fatigue life.关键词
随机振动/疲劳寿命/复合材料/层合板/有限元分析Key words
random vibration/fatigue life/composite material/laminated plates/finite element analysis分类
通用工业技术引用本文复制引用
沙梓祥,蹇越傲,蔡登安,周光明..基于逐层失效模式的复合材料层合板随机振动疲劳寿命预测[J].复合材料科学与工程,2024,(11):43-49,7.
