Free and forced vibration analysis of flyash/graphene filled laminated composite plates using higher order shear deformation theory

Abstract

The strength of the conventional composite plates can be enhanced by the use of additional fillers. These composite plates are often subjected to dynamic loading conditions which necessitate the study of their static and dynamic behavior. In this study, laminated composite plates (LCP) are fabricated by open layup process with epoxy as a base resin, E-glass fiber as reinforcement, and fillers: flyash and graphene. The fillers are included in order to improve the mechanical properties of the composite. The filler content in the composite is limited to 5% of the total volume. The weight percentage of fiber combined with fillers, treated as reinforcing constituents is limited to 60%. Graphene and flyash are added in different proportions to develop different kinds of LCPs. The free and forced vibrations of LCPs (using simple support end conditions) are measured by an indigenously developed low-cost vibration testing module. The experimental results have been used to validate the results obtained from the mathematical modeling by using fifth-order shear deformation theory and finite element approaches. Additionally, the effect of existing discontinuity in the LCP is studied. Circular holes of different dimensions at different locations are simulated in the numerical model and the consequences on modal frequencies are analyzed.

Longitudinal deformation of Shield tunnel based on construction monitoring data

“…The experimental results showed that the damage deviation of this method was less than 4.5 %. Parida and Jena [22] reinforced polymer composites with manual layering technology, and calculated LCP under simple harmonic load based on finite element analysis. The results showed that the addition of graphene can enhance the buckling strength of LCPs.…”

Dynamics of rectangular laminated composite plates with selective layer-wise fillering rested on elastic foundation using higher-order layer-wise theory

“…The order of the displacement fields set the accuracy of the results. According to Parida and Jena’s modified fifth-order shear deformation theory ( Parida and Jena, 2021b; 2022 ) , the displacement fields (u, v, and w) in the x, y, and z directions are given by where u 0 , v 0 , and w 0 are the static mid-plane deflection of LCP in x, y, and z directions.…”

Effect of lamina orientation, crack severity, and fillers on dynamic parameters of hybrid composite cantilever beam with double transverse cracks

“…The strength-toweight ratio of conventional composites can be improved by adding fillers along with the other constituents [1]. The static and dynamic performance of the composite plates enriched with added filler is enhanced [2][3][4]. Although there is an increase in the mechanical strength of the composites with the addition of filler materials, continuous exposure of these materials to dynamic environments in industrial or household applications causes gradual degradation of the strength of the composite components or beam structures.…”