Volume 39, Number 2, April 2021
|Page(s)||309 - 316|
|Published online||09 June 2021|
Study on delamination damage evolution of composite L-shaped adhesive joint based on cohesive behavior
School of Science, Chang'an University, Xi'an 710064, China
2 School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
3 Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
The adhesive joint of composite materials is one of the typical structures in aircraft structures, and the delamination damage is one of the most important damage modes in composite adhesive joints. In this paper, static and fatigue tests were carried out on L-shaped adhesive joints to analyze the damage evolution and failure modes of delamination damage under static and fatigue loadings. Based on the cohesive constitutive models, the static and high-cycle fatigue delamination constitutive models were developed. The static and fatigue numerical models of composite L-shaped adhesive joints were established by using finite element software. The stress distribution, deformation modes and delamination propagation laws were systematically studied. The simulation results are in good agreement with the experimental results. The delamination damage initiation, evolution and failure mechanism of L-shaped adhesive joints under static and fatigue loads were revealed by combining the experimental and the numerical results, which will provide theoretical and engineering guidance for strength and fatigue analysis of composite adhesive structures.
Key words: composites / adhesive joints / fatigue / delamination damage / simulation / test
关键字 : 复合材料 / 胶接接头 / 疲劳 / 分层损伤 / 仿真 / 试验
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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