Study on the compressive failure mechanism of composite stiffened plate with ply drop-off structure

doi:10.19936/j.cnki.2096-8000.20220528.011

Abstract

Abstract: In order to investigate the influence on composite stiffened plate load-bearing capacity, failure mode and failure location of the ply drop-off composite structure under axial compression, experimental studies were carried out for hat-shaped stringers with ordinary and ply drop-off layups. Finite Element (FE) models of composite stiffened plates with the ply drop-off structure were established by using Abaqus. The FE models adopt two-dimensional Hashin failure criterion and analyze the failure process and compressive performance of two types of composite stiffened plates. The FE models accurately predict the ultimate load, failure mode and failure location, which are in good agreement with the experimental results. The present study shows that the ultimate load obtained by the finite element (FE) method is in good agreement with the experiment. The failure load error of ply drop-off composite structure and the conventional structure is 1.1% and 4.7%, respectively, indicating that the modeling method adopted in this paper is reasonable and effective, and can provide guidance for practical engineering applications. Inaddition, it shows that appropriate ply drop-off does not influence the load-bearing capacity and failure mode of composite stiffened plate, but it may change the failure location.

Key words: composite material, stiffened plate, the ply drop-off structure, carrying capacity, failure mode

CLC Number:

TB332

XUE Han, YU Yin. Study on the compressive failure mechanism of composite stiffened plate with ply drop-off structure[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(5): 78-84.

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