Simulation Study of Shear Stress Distribution in Bolted Connection Structures of Sandwich Composite Plate

For the shear problem of the bolt connection structure of Sandwich Composite Plate, shear test is carried out on two kinds of Bolt Connection Structure of Sandwich Composite Plate, namely, Pre-embedded countersunk bolt and Assembled countersunk bolt, and the shear strength and stress distribution of the two kinds of bolt connection structure are investigated by using ABAQUS, and the finite element simulation results coincided with the test phenomenon well. Using this model, the stress distribution under shear damage of the Bolt Connection Structure of Sandwich Composite Plate is analysed, and the influence of bolt preload is also analysed, and the results showed that: the stress of the Sandwich Composite Plate is mainly concentrated in the Skin on the bottom side, and gradually decreased to the top surface; the influence of bolt preload could be disregarded in the analysis of the shear strength and stress peak of the Sandwich Composite Plate.