CFRP加固修复铝板结构的载荷传递效果

摘要

采用碳纤维布加固修复铝板结构并进行静力拉伸试验,探讨了碳纤维布粘接长度、层数、粘接方式等因素对载荷传递效果的影响,分析了各因素影响下试样的破坏过程、破坏特征、应变分布及变化规律,比较了碳纤维布加固完好铝板与损伤铝板的不同.结果表明:双面粘贴可以大幅提高损伤试样的承载能力,而对完好试样的提高效果一般;适当增加补片层数,可以提高修复试样的承载能力,降低补片端部和损伤区域的应变梯度,缓解补片端部和损伤区域的应力集中;增加补片的长度,尽管试样的承载能力提升有限,但可以改善胶层界面应力分布,降低端部与损伤区域碳纤维布的应变梯度,对修复构件整体性能提升有益.%Tensile tests of aluminum plate repaired with carbon fiber sheet were conducted,the effects of bonding length,layer number and bonding way on load transfer had been discussed,the failure process,failure characteristics,strain distribution and change law were also analyzed,Effects of CFRP reinforced intact specimens and damaged specimens were compared. Test results indicate that a-dopt double adhesive,the load of damaged specimen can be greatly increased while has no significant effect on intact sample. Increas-ing layer number can improve the bearing capacity of repaired specimen and reduce the strain gradient at the end and damaged region, also the stress concentration problem is eased. Although the improvement of bearing capacity is limited through increasing the length of carbon fiber sheet,the stress distribution of glue layer has been improved ,the strain gradient at the end and damaged region are also reduced,so it is conducive to improve the whole performance of repaired component.