Selective layer-by-layer fillering and its effect on the dynamic response of laminated composite plates using higher-order theory

Abstract

In this work, a fifth-order shear deformation theory is computed using the layer-wise model to determine non-dimensional fundamental frequencies. The theoretical, experimental, and finite element analysis (FEA) results are compared for a standard isotropic material. Hand layup technique is used to prepare glass fiber reinforced polymer composites (GFRPC) with selective layers filled with graphene and flyash. This technique helps to reduce the fabrication cost as the whole structure is not to be strengthened by the fillers. Six classes of the laminated-composite-plate (LCP) such as outer layer graphenated LCP (O-LCP), core layer graphenated LCP(C-LCP), functionally graded LCP (FG-LCP), LCPs only rich in graphene (G-LCP), LCPs only rich in flyash (F-LCP) along with a neat epoxy-glass LCP (N-LCP) are fabricated. A low-cost frequency measurement module is set-up to measure the fundamental frequency (FF) of the fabricated LCPs. FFs, amplitudes, non-dimensional stress parameters, and central deflection of the LCPs under harmonic load, the buckling strength, and displacements of the LCPs are calculated. It is found that harmonically excited C-LCP and O-LCP have better stability accompanied by lower deflections, followed by G-LCP as compared to other kinds of LCPs. Also, the addition of graphene increases the buckling strength of LCPs, which portrays that the local layer filling is a useful technique to enhance the strength of the LCPs.

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

“…OLCP shows higher buckling stability (nearly 15% more buckling strength) than that of CLCP. It is understood that graphene platelets distributed at the outer surface of LCP cause an increase in surface hardness due to the fact that it has a higher surface area and cross-linking density (Ebrahimi et al, 2019; Parida and Jena, 2022). As a result, the hardness of the outer scale of LCP increases significantly and shows a remarkable increase in buckling strength.…”

“…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.…”

Effects of friction pendulum bearing wear on seismic performance of long-span continuous girder bridge

“…When the critical resistance was reached, the creep resistance and wear resistance of the wear-resistant plates decreased rapidly. At the same time, the sliding block of FPBs swung along the sliding direction, resulting in a more significant compressive stress on the edge of the wear-resistant plate and up to being torn [20], [21].…”

Dynamic analysis of gear pairs with the effects of stick-slip

“…In tooth surface fault diagnosis, the plate and beam models are usually used to approximate the gear body and gear tooth, respectively. And the dynamic characters of the plate [18][19][20] and the beam [21,22] have been developed for a long time. The existing research on gear bonding failure is mainly through oil analysis [23] and fatigue tests [24].…”