Journal of Science and Technology of Composites

Journal of Science and Technology of Composites

Modeling and analysis of mechanical behavior of drilled laminated composites subjected to tensile and compressive loads

Document Type : Research Paper

Authors
Mahnaz Zakeri 1
Hadi Ghesmati-Kucheki 2
Majid Reza Ayatollahi 2
1 Advanced Structures Research Laboratory, Aerospace Engineering Department, K. N. Toosi University of Technology, Tehran, Iran.
2 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.
10.22068/jstc.2023.558291.1796
Abstract
In this paper, first, the process of modeling the delamination due to the traditional drilling process with twist bit in composite laminates in the finite element bed has been described and the drilling results in a laminate have been investigated. Then, the mechanical behavior of this laminate containing the delamination was studied under uniaxial loading and the results of the analysis were compared with the literature. For this analysis, the mechanical and strength properties and behavior of the composite layers were assigned by writing the structural laws of anisotropic materials and the Hashin damage criterion, respectively, in the form of VUMAT subroutine in ABAQUS software. To monitor the delamination phenomenon, cohesive elements between the layers were used based on the bilinear traction-separation law. There was a good agreement between the results of the present finite element analysis and the previous researches. In the following, the behavior of drilled composite laminate containing primary drilling-induced delamination under tensile and compressive loads was investigated. The results show that in the case where the initial delamination was applied around the hole, the tensile and compressive strength of the laminate decrease by 5.5 and 19.5 percent on average, respectively, compared to the case where the drilled plate was analyzed regardless of the initial delamination. The larger the delamination area, the greater the strength drop
Keywords
Laminated composites
drilling
delamination
uniaxial loading
finite element analysis

Subjects

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Journal of Science and Technology of Composites
Volume 9, Issue 3
Autumn 2022
Pages 2033-2045