NUMERICAL ANALYSIS OF BENDING CHARACTERISTICS OF CFRP/DC04 STEEL BONDING JOINTS

Abstract

Abstract: The finite element model of the bonded specimens was established based on the quasi-static three-point bending test of CFRP/DC04 steel bonded joints and the simulation results calculated by ABAQUS/Explicit have good consistency with the test results, which proves that the model reproduces the mechanical response of the bonded joint under load. Based on the simulation results, the stress distribution law and damage failure mechanism of the adhesive layer are analyzed. The results show that the stress distribution of the adhesive layer is obviously different under the bending load. The normal stress σ is mainly concentrated at both ends; the shear stress τ₁₃ is symmetrically distributed along the length of the adhesive; the shear stress τ₂₃ is distributed at the four corners of the adhesive. Due to the different stiffness and relative position of the bonding plates, the adhesive at one end first is peeled off due to large normal stress, and gradually expands to the other end. Based on this, the influence of the relative position of the bonded plates on the bending resistance of the bonded joints was analyzed. It was found that the CFRP plate at bottom has a better joint tenacity and higher bending strength than the plate at the top.

Key words: numerical simulation, CFRP/DC04 bonding, stress, damage failure, relative position

CLC Number:

TB332

DONG Bo-yan, MA Qi-hua. NUMERICAL ANALYSIS OF BENDING CHARACTERISTICS OF CFRP/DC04 STEEL BONDING JOINTS[J]. Composites Science and Engineering, 2019, 0(11): 37-44.

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