复合材料高低周复合疲劳试验技术  

Combined cycle fatigue test technology for composite materials

作　　者：温班宁 李少林[1,2] 石多奇[1,2] 向首亮 曹端兴 齐红宇[1,2] WEN Banning;LI Shaolin;SHI Duoqi;XIANG Shouliang;CAO Duanxing;QI Hongyu(School of Energy and Power Engineering,Beihang University,Beijing 102206,China;Beijing Key Laboratory of Aero-Engine Structure and Strength,Beihang University,Beijing 102206,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京102206 [2]北京航空航天大学航空发动机结构强度北京市重点试验室,北京102206

出　　处：《航空动力学报》2025年第1期339-345,共7页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅳ-0007-0044)。

摘　　要：为了研究复合材料的高低周复合疲劳特性,本文综合分析了现有的高低周复合疲劳试验平台设计思路及研究进展,以搭建适用于复合材料的复合疲劳试验平台。结合复合材料疲劳失效特性,设计了非对称哑铃型的二维编织复合材料试件用于复合疲劳试验。试验结果显示:试件在特殊设计的疲劳考核区发生断裂失效。失效部位的应变曲线既展现了受低周疲劳载荷作用时低频高幅值的变化特征,也具有受高周疲劳载荷作用时高频低幅值的变化特征,证明失效部位在试验中受到非干涉高低周复合疲劳载荷的持续作用。疲劳试验的顺利开展表明该研究为复合材料的复合疲劳试验研究提出一种试验方法。In order to research the combined cycle fatigue properties of composite,this paper comprehensively analyzes the existing design ideas and research progress of existing combined cycle fatigue test platforms,aiming to building a combined cycle fatigue test platform for composite materials.Based on the fatigue failure mode of composite,the 2D braided composite specimen is designed as the asymmetric dumbbell shape for the fatigue test.The test result shows that failure occurred in the fatigue assessment area of the specimen.The strain curve of the failure site shows the characteristics of low frequency and high amplitude caused by low cycle fatigue load,and the characteristics of high frequency and low amplitude caused by high cycle fatigue load.The completion of fatigue test demonstrates a test method for the research of combined cycle fatigue test of composite materials.

关 键 词：复合材料 高低周复合疲劳 复合疲劳试验平台 非对称哑铃型 疲劳考核区 

分 类 号：V258.3[一般工业技术—材料科学与工程]