Effect of material type on mechanical properties of bonded joint based on cohesive model

doi:10.19936/j.cnki.2096-8000.20231228.004

Abstract

Abstract: To explore bonding material type on the mechanical behavior and failure mechanism of adhesive joint, cohesive zone model (CZM) and Hashin failure criteria were used to model adhesives and carbon fiber reinforced polymer (CFRP) composite laminates, respectively. The accuracy of the model is verified by the simulation of the CFRP laminate bonding joint test,which extracted from the literature. In addition, based on the verified model, the tensile numerical models of the single-lap adhesive joint with the same material (CFRP, steel plate, aluminum plate) and different materials (CFRP/ steel plate, CFRP/ aluminum plate) were established, and the tensile damage and stiffness degradation characteristics of different parts of the adhesive joint were analyzed. The results showed that the ultimate load of all lap joints increases with the increase of bond length. When steel plate and aluminum plate were lapped with CFRP, the strength of steel plate is higher than that of aluminum plate, resulting in greater tensile strain and stripping strain of aluminum plate for hybrid lap joints. Therefore, the ultimate load of steel plate mixed lap is higher than that of aluminum plate. The initial damage of adhesive layer and CFRP laminate was affected by bonding material type during loading. This paper provided the basis for the design of the adhesive joint by studying the adhesive joints of different bonding materials.

Key words: composite materials, adhesive structures, single-lap joints, numerical simulation, stress distribution, mechanism of failure

CLC Number:

TB332

XIAO Xiao, YUE Tao, ZHANG Tieshan. Effect of material type on mechanical properties of bonded joint based on cohesive model[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(12): 28-37.

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