摘要
Abstract
The finite element model is developed by Abaqus for analyzing the fracture problem of cracked metallic plate repaired with the double-side adhesively bonded composite patches,in which the thermal residual stresses is also contained,and the stress intensify factor(SIF) is used to evaluate the repair effect.Meanwhile,with the help of orthogonal table L9(34),the parameter of the patches,which influence the repair effect,has also been evaluated.The orthogonal analysis result shows that,in confidence level of 99％,the contribution ratio of lay-up direction and patch thickness are 68.77％ and 29.59％ respectively.Meanwhile,the influence of patch length is rarely.Moreover,connect the orthogonal analysis result with the applied condition,the patch parameter is elected to repair the cracked metallic plate for the uniaxial tension test.And the test result indicates that the tension intensity of the repaired plate is 1.32 times than cracked plate,and 97.2％ of the uncracked one.Meanwhile,the elongation of the repaired plate is 2.24 times than the unrepaired one,and 50.7％ of the uncracked one.The repair effect is best when the square patch length is 40 mm,thickness is 1.2 mm and lay-up direction is [0°/90°] s.关键词
复合材料胶接修复/有限元分析/正交分析/贡献率/静拉伸试验Key words
Adhesively bonded composite repair/Finite element analysis/Orthogonal analysis/Contribution ratio/Tension test分类
通用工业技术
