Effect of Crack on Strength and Stiffness of Composite Structures using VAM

Sahu, KN and Kaushik, R and Burela, RG and Harursampth, D (2023) Effect of Crack on Strength and Stiffness of Composite Structures using VAM. In: 25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 28 May 2023through 1 June 2023, Bengaluru.

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Abstract

This paper demonstrates an analysis method to predict the residual strength and stiffness of a cracked composite plate with different lay-up sequences. Considering the advantage of the small thickness of the plate and shell, It is very useful to analyze them as dimensionally-reducible structures. Variational Asymptotic Method (VAM) is used to derive 2D constitutive law for plate analysis. All the desired 3D fields (displacement, strain and stress) have been calculated for a healthy and cracked composite plate by VAM and compared with finite element analysis using commercial software. The results exemplify that VAM is a very powerful tool, which is simultaneously efficient and accurate compared to 3D FEA, Hence it helps to reduce the analysis time substantially. It will help the designer in the preliminary estimation of the residual strength and stiffness of the damaged component. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Item Type:	Conference Paper
Publication:	25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2023
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to American Institute of Aeronautics and Astronautics Inc, AIAA.
Keywords:	Aviation; Cracks; Finite element method; Fracture mechanics; Plates (structural components); Stiffness; Structural dynamics, Analysis method; Composite plates; Composites structures; Fractures mechanics; Lay-up sequences; Plate and shell; Residual stiffness; Residual strength; Strength and stiffness; Variational asymptotic methods, Fatigue of materials
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	10 Oct 2024 12:18
Last Modified:	10 Oct 2024 12:18
URI:	http://eprints.iisc.ac.in/id/eprint/86448

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