挖补修理对复合材料层合板拉伸性能的影响

摘要

挖补修理是一种先进的复合材料层合板损伤修理技术,分为斜接法和阶梯法两种类型.本文研究不同修补结构对斜接法挖补修理试验件力学性能的影响.对斜接法楔形砂磨斜坡比率为1∶10、1∶20、1∶30和1∶40的复合材料层合板修理试验件的拉伸性能进行了研究,同时总结了斜接法修理后试件的断裂位置特征.结果表明:斜接法斜坡比率为1∶30的挖补修理试件的抗拉强度最好,外加补片会提高试件的抗拉强度,外加补片层数2层为宜.断裂类型主要有脱胶断裂和补片断裂.%Scarf repair of composite material has been proved to be an advanced repairing technology,which consists of beveled joint and ladder joint.The effect of different repairing structure on mechanical properties of beveled joint scarf repair is researched.The tensile properties of repaired composite laminating with slope ratios of 1∶10,1∶20,1∶30 and 1∶40 are studied respectively; meanwhile,the location of its fracture is summarized.The results show that the tensile strength of the scarf repaired specimen with the slope ratio of 1 ∶ 30 is the best.Plus patch can improve the tensile strength of the specimen,and the appropriate number of the plus patch is 2.The fracture types mainly include degumming fracture and complement-chip fracture.