Dynamic analysis of composite plates reinforced with MWCNT nanoparticles: theoretical and experimental study

Purpose In this study, the vibration analysis of composite plate reinforced with various volume fractions of multi-walled carbon nanotube (MWCNT) nanocomposite has been investigated analytically. Design/methodology/approach The mathematical model for the vibration analysis of the plate was solved to evaluate the plate’s response and natural frequency for different design parameters. The first-order shear deformation theory was employed to formulate the governing differential equation of motion of the plate with simply supported boundary conditions. Findings The plate structure used for the free vibration test comprises multi-layers of Perlon, Carbon, Kevlar and Kenaf, each with dimensions of 0.5 × 0.5 × 0.01 m. The matrix material used is the thermoplastic resin (orthocryl resin); it is widely used in biomaterial and energy applications to hold reinforcing materials such as Kevlar fibers, carbon fibers, or fillers. The material has several properties essential to composite structures, including flexibility, durability, strength and reinforcements. This composite fiber is oriented in two directions (Bidirectional at a 90° angle to each other). This results in a more balanced distribution of strength and stiffness in both directions. Nanoparticles with volume fractions of 0.5%, 1%, 1.5%, 2% and 2.5% were added. The results show that the free vibration characteristics and mechanical properties, including elastic modulus, response and natural frequency increase with the addition of volume fraction of the nanomaterial. Practical implications The research could lead to the development of lighter, more efficient aircraft structures with enhanced vibration resistance and mechanical strength, contributing to better performance, fuel efficiency and safety. The developed reinforced composite could be utilized in aircraft elements where weight reduction and greater durability are crucial. Originality/value The reinforcement of 2.5% MWCNT volume fraction increases the natural frequency of the composite plate by about 13.5% and the modulus of elasticity by 25.3%.