Effect of delamination on the natural frequency of fiber metal laminate under various conditions

RAUT, NIKHIL P; Kulkarni, Vivek V; Gombi, S L; Mirza, M M

doi:10.22075/macs.2026.38282.1887

Effect of delamination on the natural frequency of fiber metal laminate under various conditions

Articles in Press

Document Type : Research Article

Authors

NIKHIL P RAUT ¹

Vivek V Kulkarni ²

S L Gombi ²

M M Mirza ³

¹ Shivaji University

² KLs Gogte Institute of Technology, Belagavi, Karnataka, India

³ KSE Rajarambapu Institute of Technology, Rajaramnagar, Maharashtra, India.

10.22075/macs.2026.38282.1887

Abstract

Multi-layered composite materials with improved capabilities are fiber metal laminates (FMLs). Damage to the composites, such as delamination, decreases their stiffness and modifies the dynamic behaviour of the structures. Vibration analysis can be a good way to forecast delamination since the loss of stiffness affects the natural frequencies, mode shapes, and other structure features. In this research, vibrational analysis of aluminum and mild steel-based carbon fiber metal laminates are considered with delamination. A total of 36 fiber metal laminate specimens of 3/2 configuration with various delamination area and situated at various interface were considered for vibrational analysis, which was carried out experimentally and by FEA software. The analysis is done on healthy and delaminated specimens under clamped-free, clamped-clamped condition. The results demonstrate that the proposed method indicates that delamination reduces the natural frequency of the FML. The decrease in natural frequency can be used for damage detection which will act as base for an inverse problem.

Keywords

Delamination

Natural Frequency

fiber metal laminate

vibrational analysis

experimental modal analysis

Subjects