Numerical Investigations on Free Vibration Analysis of Delaminated Composite Plate

Saeesh Verenkar; I Sridhar; P S Shivakumar Gouda

doi:10.17485/IJST/v16i42.1866

Article

Numerical Investigations on Free Vibration Analysis of Delaminated Composite Plate

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v16i42.1866

Year: 2023, Volume: 16, Issue: 42, Pages: 3714-3720

Original Article

Numerical Investigations on Free Vibration Analysis of Delaminated Composite Plate

Saeesh Verenkar^1,2*, I Sridhar¹, P S Shivakumar Gouda¹

¹Reseacrh Center, Dept. of Mechanical Engineering, SDM College of Engineering and Technology,Visvesvaraya Technological University, Belagavi, India
²Mechanical Engineering Department, Padre Conceicao College of Engineering, Verna, Goa, India

*Corresponding Author
Email: [email protected]

Received Date:27 July 2023, Accepted Date:05 September 2023, Published Date:12 November 2023

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Background: This research investigates the numerical evaluation of delamination effects on a composite laminate by analysing the size and location of delamination under various boundary conditions. Methods: The study employs modal analysis on an eight-ply composite laminate with the sequence (0/90/45/90)s using the Ansys Composite PrepPost (ACP) module. Initially, the natural frequencies and mode shapes of the undamaged composite laminate are validated against existing literature. Subsequently, deliberate damage is induced in the laminate to examine the influence of the size and location of the damage for different boundary conditions. Findings: The results reveal that the natural frequency of the plate is highest at the midplane and diminishes progressively towards higher interfaces. Furthermore, delamination significantly affects higher modes of vibration more than the fundamental mode. The research also explores the impact of varying degrees of restraint on the composite laminate, indicating that a higher degree of constraint leads to an increased natural frequency. Finally, a substantial difference of over 20% in natural frequency is observed between an intact plate and a damaged plate when the level of constraint on the plate is intensified. Novelty and applications: The novelty of this work lies in the innovative approach of utilizing Finite Element simulations through the ACP module. This unique method adds a fresh dimension to the study, enabling a more comprehensive exploration of the behaviour of composite laminates under delamination. The integration of ACP contributes to a deeper understanding of the intricacies involved, thereby enhancing the significance of the findings.

Keywords: Composite, Delamination, Modal Analysis, ANSYS, Frequency, Mode Shape

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Copyright

© 2023 Verenkar et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)