Hybrid joints have better tensile properties than pure bonded and bolted bolts,and are increasingly used in the aerospace field.Tensile tests are carried out for the Hybrid Bonded/Bolted(HBB) joints of Carbon Fiber Reinforced Polymer (CFRP) laminate and titanium alloy plate under different bolt numbers,and the corresponding load-displacement curves are obtained.At the same time,based on Continuum Damage Mechanics (CDM) theory,which is derived from 3D Hashin failure criteria,and a Cohesive Zone Model (CZM),the tensile strength prediction model of the composite laminate-titanium alloy plate multi-bolted HBB joint was established,and the numerical simulation results were in good agreement with the experimental height,which validate the feasibil-ity of the model.The difference in the bearing capacity of HBB joints under different numbers of bolts is compared and analyzed.On this basis,the influence of inter-bolt distance on the tensile properties of the HBB joints is explored.The results show that the double-nail HBB joints can effec-tively improve the end warpage and low bearing capacity of the single-nail HBB joints.The tensile failure load of the double-nail HBB joints under the standard lap width (30 mm) is 82.6％ higher than that of the single nail,the tensile failure load of the three-bolt HBB joints is 34.1％ higher than that of the double nail.For the three-bolt HBB joint,the joint strength is controlled by the adhesive and the external bolt,while the internal bolt is redundant,the hybrid joint can be simplified by reducing the middle bolt.The inter-bolt distance has a great influence on the failure load of the hybrid joint.Increasing the inter-bolt distance can effectively improve the bearing capacity of the structure.

Yanping ZHENG;Chaoyu ZHANG;Ying TIE;Xu WANG;Mingkun LI

School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China

中国航空学报（英文版）

[1]Yanping ZHENG;Chaoyu ZHANG;Ying TIE;Xu WANG;Mingkun LI-.Tensile properties analysis of CFRP-titanium plate multi-bolt hybrid joints)[J].中国航空学报（英文版）,2022(03):464-474

Bolted,feasibil

Tensile,properties,analysis,CFRP,titanium,plate,multi,hybrid,joints,Hybrid,have,better,tensile,than,pure,bonded,bolted,bolts,increasingly,used,aerospace,field,tests,carried,out,Bonded,HBB,Carbon,Fiber,Reinforced,Polymer,laminate,alloy,under,different,numbers,corresponding,load,displacement,curves,obtained,At,same,Continuum,Damage,Mechanics,CDM,theory,which,derived,from,Hashin,failure,criteria,Cohesive,Zone,Model,CZM,strength,prediction,model,composite,was,established,numerical,simulation,results,were,good,agreement,experimental,height,validate,difference,bearing,capacity,compared,analyzed,On,this,basis,influence,distance,explored,show,that,double,nail,can,improve,end,warpage,low,single,standard,lap,width,higher,three,For,controlled,by,adhesive,external,while,internal,redundant,simplified,reducing,middle,has,great,Increasing,effectively,structure

0.436308