Theoretical and test analysis of the influence of adhesive structure parameters on connection failure performance
QIU Mingjun
WANG Tao
JI Jiang
JIA Yiming
WANG Chen
HONG Jun
WANG Shechang
LIN Qiyin
Abstract：To enhance the assembly connection performance of adhesive structures in heavy machinery and aerospace equipment,a numerical analysis model based on the cohesive force element was developed to investigate the failure behavior of adhesive joints.The evolution of shear stress distribution in the adhesive layer during the tensile-shear failure process under different loading stages was analyzed.The variations in ultimate failure load and structural stiffness with different adhesive joint parameters were systematically studied,and tensile-shear failure tests were conducted.The results indicate that the shear stress distribution in the adhesive layer transitions from an initial U-shaped profile to an M-shaped and finally evolves into an approximately inverted U-shaped pattern as the load increases.Increasing the length or width of the adhesive layer significantly improves both the ultimate failure load and overall structural stiffness.However,increasing the adhesive layer thickness or substrate thickness exhibits a minor effect on the ultimate failure load.Notably,the structural stiffness decreases with increasing adhesive thickness but increases with higher substrate thickness.
Keywords：Adhesive joint structureAssembly interface adhesive strengthCohesive force elementAdhesive stressUltimate failure load
Publication Date：2025-09-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：11( 102-112 )