湿热环境对民机复合材料强度的影响研究  

Study on effect of hydrothermal environment to civil aircraft composite laminates strength

作　　者：贾宝惠[1] 刘萱[1] 卢翔[1] 蔺越国[1] 

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《中国民航大学学报》2017年第1期11-16,共6页Journal of Civil Aviation University of China

基　　金：国家自然基金重大预研项目(3122014P002);中央高校基本科研业务费专项(3122014D016;3122015C010)

摘　　要：为研究民机复合材料层合板湿热环境下对其强度的影响,采用刚度折减理论,建立应力-应变本构方程,并利用Hoffman强度理论和刚度修正的方法,对复合材料单向板T300/3238A在5种湿热环境下和复合材料层合板CCF300/5228在湿热与干态常温2种环境下,分别进行强度分析。计算了初始层破坏载荷与极限载荷,并与实验数据对比分析,准确地预测此类复合材料层合板的整体失效过程、失效载荷及其在湿热环境作用下的强度影响。本研究利用实验与理论分析相结合的方法研究复合材料的湿热效应,提供一种适用于民机复合材料维修工程的分析方法。Based on modified stiffness theory, the hydrothermal effect on composite laminates of civil aircraft is studied. Specifically, the strength of unidirectional composite board T300/3238A under five kinds of hydrothermal conditions and laminate CCF300/5228 under ghydrothemal environment and normal dry state are studied with mathematical model of stress-strain constitutive equation, Hoffman strength theory and stiffness correction method. Lastly, initial layer cracking load and ultimate lod are calculated and then compared with experimental data, the over all failure process, failure load, and strength impact in hydrothermal environment of this composite laminate can be predicted accurately. Combinng with experiments and theoretical method, this approach is feasible to analyze the hydrothermal effect on composite laminates in civil aircraft maintenance applications.

关 键 词：复合材料 Hoffman强度理论 刚度修正 极限载荷 湿热效应 

分 类 号：V257[一般工业技术—材料科学与工程] TB332[航空宇航科学与技术—航空宇航制造工程]