干法/湿法挖补修理层合板力学性能的对比研究  

Comparison of mechanical properties of precured-patch scarf repaired and wet-layup scarf repaired laminates

作　　者：张书铭 关志东[1] 苏雨茹 黎增山[1] ZHANG Shuming;GUAN Zhidong;SU Yuru;LI Zengshan(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《材料工程》2023年第10期165-177,共13页Journal of Materials Engineering

摘　　要：挖补修理是一种常用的受损复合材料结构修复方法,主要可分为干法(预固化补片)修理和湿法(湿铺贴)修理。通过开展静力拉伸实验,研究了不同损伤尺寸的预固化补片挖补修理和湿铺贴挖补修理层合板的极限强度、破坏模式以及补片脱粘情况,实验结果表明采用预固化补片修理的结构其强度恢复率更高,补片提前脱粘概率更低,修理效果更好。在力学实验的基础上,通过有限元计算准确预测了挖补修理层合板的极限强度、应力应变分布和损伤演化过程,计算结果表明预固化补片修理结构的胶层应力分布更加均匀,应力水平和应力集中程度更低,出现界面失效和胶层内聚失效的载荷也更高。Scarf repair is a widely used repair method for damaged composite structures,which can be divided into two categories:dry(precured-patch) repair and wet(wet-layup) repair.The ultimate strength,failure mode and patch debonding of scarf repaired composite laminates were studied by static tensile test.The specimens with different damage sizes were repaired by dry repair and wet repair method.The experimental results show that the higher recovery of failure strength and the lower probability of patch debonding can be obtained by using precured-patch repair method.Based on the experimental investigation,finite element analysis was carried out to accurately predict the ultimate strength,stress-strain distribution and damage evolution process of scarf repaired laminates.The simulation results show that the use of precured-patch repair can improve the mechanical performance of the repaired laminates compared to that using wet-layup repair.The stress distribution of the bondline is more uniform,the stress level and stress concentration are lower,and the load of interface failure and cohesive failure are higher.

关 键 词：复合材料层合板 挖补修理 渐进损伤模型 有限元分析 

分 类 号：TB332[一般工业技术—材料科学与工程]