复合材料胶接修补金属结构的非对称脱胶分析  

Analysis on Asymmetric Disbond of Damaged Metallic Structures Bonded With Composite Patches

作　　者：刘国春[1] 周斌[1] 刘峰[1] 唐庆如[1] 崔继斌 

机构地区：[1]中国民用航空飞行学院航空工程学院,广汉618307

出　　处：《宇航材料工艺》2015年第3期45-49,共5页Aerospace Materials & Technology

基　　金：国家自然科学基金民航联合基金(U1233202);民航局重大项目(MHRD201240)

摘　　要：根据完整复合材料修补模型进行分析与验证,在此基础上针对小型非对称脱胶建立了脱胶分析有限元模型,引入脱胶影响"当量距离"的概念,分析了不同尺寸与位置的脱胶对于维修效果的影响。结果表明:脱胶直径较小时,裂纹强度对于脱胶位置的改变不敏感;当脱胶尺寸足够大时,在裂纹尖端附近存在一个脱胶敏感区域,在此区域内发生脱胶对于修补强度影响较大,而且该影响区域随着裂纹长度增加而增大。According to disbond of damaged metallic structures bonded with composite patches, a three dimensional finite element analysis model was developed for the composite repairs, which conforms with the results of experienced formula. The disbond model is also developed by the basic model, and equivalent distance was proposed for analyzing the effects of disbond with different sizes and positions. The result shows that the large disbond is more effective than little one, there is a strength sensitive zone near the crack tip and it is determined by crack length.

关 键 词：复合材料 裂纹尖端 脱胶影响 胶接修补 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]