Vibration characteristics of carbon fiber/epoxy laminates with delamination damage in hygrothermal environment

doi:10.19936/j.cnki.2096-8000.20220928.008

Abstract

Abstract: The vibration characteristics of T700-100/7202K-38 carbon fiber/epoxy composite laminates under free boundary condition are studied in hygrothermal environment through modal experiments and finite element simulations. Hygrothermal vibration experiments were carried out on laminates without delamination, different delamination positions and different delamination angle damage. Based on the principle of hygrothermal equivalence, a finite element model of the laminate was established through ABAQUS, and the simulation results were compared with experimental values to verify the accuracy of the model. Experimental and simulation results show that: The hygrothermal effect has little effect on the natural mode shape of the laminate, but it has the greatest impact on the first-order natural frequency of the laminate. The delamination damage of the laminate will also change its vibration characteristics, when the delamination moves from the surface of the laminate to the middle surface of the laminate, the natural frequency of the laminate is affected more by the hygrothermal effect. When the delamination angle is 90°, the natural frequency value of the laminate drops the most.

Key words: composite laminates, hygrothermal effect, delaminated damage, modal experiments, finite element simulation, natural frequency

CLC Number:

TB332

JIA Bao-hui, WANG Hao, LU Xiang, SHAN Jin-yang, ZHAO Yao-bin. Vibration characteristics of carbon fiber/epoxy laminates with delamination damage in hygrothermal environment[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(9): 54-61.

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