粘接压力对GFRP-A1单搭接接头性能影响研究

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Study on the influence of bonding pressure on the performance of GFRP-Al single lap joints

CUI Tu’，GAO Guibin²， JI Chunming 2* ，WANG Bing² （1. China Airlines Hair Harbin Dongan Engine Co.，Ltd.，Harbin ; 2.Institute of Composite Materials and Structures，Harbin Institute of Technology，Harbin ）

Abstract：To investigate the influenceof diffrent bonding pressures on the bonding performance between GFRPand aluminum alloy，speciall designed fixtures were used toapply pressure and cure GFRP-Al single-lapjoints，resulting in the preparation of GFRP-Al single-lap joints under bonding pressres ranging from O.01 MPa to O.O5 MPa.The mechanical properties werestudiedthrough tensileshear tests，andtheresultsshowedthatthere were significantdiferences inthe shear strength ofGFRP-Alsingle-lapjointsunderdiffrentbonding pressures.Withthe increaseofbonding pressure，the shear strength ofGFRP-Alsingle-lapjoints showedadecreasing trend intherangeofO.O1MPa toO.O3 MPa，increased slightly at 0.04 MPa，but decreased sharplyat O.O5 MPa.Aditionaly，the failure modesof GFRP-Alsingle-lapjoints varied with diffrentbonding pressures： mixedfailure was more common underlowbonding pressures，while interface failure between theadhesivelayerandaluminum alloyoccurredunderhighbonding pressures.Tofurther investigatethefailurebehaviorof GFRP-Al single-lap jointsunderdiferent bonding pressures，a finiteelement simulation model of GFRP-Alsingle-lap jointswasestablished.Thefailurebehaviorof thejointswassimulatedbyaltering thebonding propertiesof theAl/adhesive interface under different bonding pressures.

Keywords：adhesive; GFRP; single-lap joint; failure mode; bonding pressure; cohesive zone model

1引言

直升机尾传动轴作为直升机传动系统重要组成部件，对动力学性能要求高。（剩余7926字）