Investigating the Effect of Delamination Size, Stacking Sequences and Boundary Conditions on The Vibration Properties of Carbon Fiber Reinforced Polymer Composite

Abstract

Composite structures are extensively used in various fields ranging from, but not limited to marine, aerospace, automotive, agricultural and industrial equipment due to their unique and excellent properties like weight associated with density. On an increase in their applications, it also requires special attention to manufacture and process the composites to acquire the high level of stability. Most critical defect in composite structures that have attracted many researchers is delamination. Delamination in composite structures are inevitable during service period. Present work is focused on investigating the effect of presence of delamination in the carbon fiber reinforced composite plate using finite element solver software, ANSYS. Present analysis will focus to find the effect of delamination size, boundary constraints and layups on the natural frequency of carbon fiber composite plate. Analytical results were also analyzed using MATLAB environment. Governing equations were derived using Rayleigh-Ritz method. The natural frequency reduced on an increase in delamination size and it is high in clamped-clamped boundary conditions rather than simply supported constraints. The finite element results are then compared with analytical results for clamped-clamped boundary conditions and found in close agreement.

Detection and Quantification of Delamination Failures in Marine Composite Bulkheads via Vibration Energy Variations

“…Indeed, the majority of the research publications published in the field of vibration-based structural health monitoring (VSHM) are concentrated on the variation of the modal parameters. A couple of interesting contributions to the field were reported by K. Alnefaie et al [ 24 ] and M. Imran [ 29 ]. The first one [ 24 ] carried out a detailed analysis of the natural frequency changes in composite laminates due to internal delamination defects.…”

“…In parallel, the potential of the vibratory mode shape changes as a key performance indicator (KPI) of the damage state of composite laminates was also examined in a large number of research works [ 27 , 28 , 29 ]. The above-mentioned studies [ 27 , 28 ] investigated the influence of delamination defects on the geometry of the vibratory mode shapes from composite laminar materials.…”

Experimental, Numerical and Finite Element Vibration Analysis of Delaminated Composite Plate

“…Composite materials have many advantages when compared to conventional materials. That are lightweight, cheaper, stiffer, stronger and eco-resistant [5]. A good example of a composite material is carbon-fiber-reinforced polymers.…”

“…It must not be forgotten that the carbon-fiber layout also has the ability to influence the carbon-fiberreinforced polymers properties. Composite laminates are preferred due to their many advantages such as their high-strength, bending stiffness and resistant to expansion [5][6][7][8][9][10]. Usually, composite laminates are formed from a hybrid of fiber-matrix layers.…”

“…It is most important to have the vibration characteristics of structures investigated prior to be applied in order to improve the design parameters [14,15]. One of the most critical defect in composites is delamination that can badly affect the behavior of composite structures [16,17] so it is equally important to study the effect of ply layups, boundary constraints and delaminated region on the vibration characteristics of composite structures [18].…”