An experimental and numerical study on the vibration characteristics of glass fiber composite sandwich panel with lattice cores

This article has experimentally and numerically investigated the high‐velocity impact resistance of the composite sandwich panel with an M‐shaped lattice core reinforced by nano‐SiO2. For this purpose, firstly, a glass fiber resin epoxy sandwich panel has been fabricated in the laboratory. In this regard, the vacuum‐assisted resin transfer molding (VARTM) method has been used to achieve a laminate without any fault. In order to improve the impact resistance of the composite, the nano‐SiO2 were added to the resin epoxy matrix as filler with the ratios of 1%, 2%, and 3% of the composite's total weight. A scanning electron microscope (SEM) has been utilized to observe the microscopic structure of the composites, and it shows an exceptional homogeneous mixture of nano‐SiO2 particles in the resin epoxy matrix. From the experiment results, it was figured out that by adding 1 to 3 wt% of nano‐SiO2 into the composite, the output velocity of the projectile decreases. On the other hand, the results showed that when the projectile collides with the core of the sandwich panel, it remains in the sandwich panel and its output velocity will be zero. However, when the projectile does not completely collide with the core, the output velocity of the projectile will not be zero. In order to validate the results, a finite element analysis (FEA) has been developed to simulate the high‐velocity impact test. Then the experimental data has been compared to numerical simulation and good agreement was observed.

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“…T A B L E 2 Properties of two-directional glass fiber (E-type) [34] Elongation (%) Tensile modulus (GPa) Tensile strength (MPa) Density (g/cm 3 )…”

Section: Materials Descriptionmentioning

confidence: 99%

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO₂

2022

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“…Some researchers have investigated the vibrational behavior of composite sandwich panels. For example, Gholizadeh Eratbeni et al 7 obtained the natural frequencies and mode shapes of a glass fiber composite sandwich panel through experimental and numerical modal analysis. In another article, Gholizadeh Eratbeni and Rostamiyan 8 compared the vibrational behavior of two carbon fiber composite sandwich panels, one with a lattice core and the other with an elliptical core, using modal analysis and finite element methods.…”

Section: Introductionmentioning

confidence: 99%

Effects of core geometry, silica nanoparticles, and polyurethane foam on the mechanical properties of a novel circular-shaped core sandwich panels under compression test: Experimental study

Shaki,

Rostamiyan,

Seyedi

2024

Journal of Composite Materials

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For the first time in this paper, a composite sandwich panel with a novel circular-shaped core reinforced with silica nanoparticles (SNPs) is designed and fabricated using the vacuum-assisted resin transfer molding (VARTM) method. Carbon fibers and epoxy resin are utilized to construct the composite sandwich panels, followed by polyurethane foam injection. After fabrication, the sandwich panels undergo uniform compression testing to examine their mechanical behavior and properties. In this study, the effects of various parameters, such as core length, core height, weight percentage (wt.%) of SNPs, and polyurethane foam, on the compressive strength of the structure are evaluated. To validate the results, a finite element simulation of the sandwich panel compression test is performed using ABAQUS software, and the results obtained are compared with experimental data, showing good agreement. The results of this research demonstrate that adding SNPs within a specific range results in a considerable enhancement of the structural strength. Adding SNPs up to 3% leads to approximately a 19% increase in the compressive strength of the structure. However, adding 4 wt.% SNPs results in a decrease of about 12% in the strength of the sandwich panel. Additionally, the core’s geometry significantly influences the control of compressive strength and rigidity of the sandwich panel. In other words, by increasing the core length, the compressive strength increases by 38%, while increasing the core height decreases compressive strength by about 30%. Also, it is found that adding polyurethane foam to the sandwich panel, despite a slight increase in weight, leads to a significant increase in compressive strength by about 32% and postpones its ultimate failure. Eventually, the hybrid specimen exhibits a strength approximately 57% greater than that of the pure foamless sandwich panel.

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“…According to their results, it was revealed that increasing the core height or young's modulus or changing laminate layup leads to increase in natural frequencies of the structure. Gholizadeh Eratbeni et al [ 30 ] presented an numerical and experimental analysis on the vibration properties of GFRP sandwich structure with truss core using modal impact test and finite element simulation.…”

Section: Introductionmentioning

confidence: 99%

Vibration behavior of a carbon fiber‐reinforced polymer composite sandwich panel: Rhombus core versus elliptical core

Eratbeni

Rostamiyan

2022

Polymer Composites

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Exploring lightweight sandwich structures with excellent load-bearing and vibration damping performances is one of the important topics in structural and functional applications. The aim of the present research is to design, fabricate carbon fiber-reinforced polymer (CFRP) sandwich panels with rhombus cores and investigate their modal characteristics by comparing with the traditional elliptical sandwich structure experimentally and numerically. In order to obtain modal properties including natural frequencies, damping ratio, mode shapes, and frequency responses of the fabricated structure, modal experiment is performed using a modal hammer with an acceleration sensor. Furthermore, a finite element method is developed to validate the precision of the experimental data. It is recognized that the finite element results are in remarkably great agreement with those obtained by modal experiment. The experimental results showed that the natural frequencies of the sandwich structures with rhombus are much higher than that of the elliptical sandwich structures under free-free boundary conditions and equal relative density of the truss cores.

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An experimental and numerical study on the vibration characteristics of glass fiber composite sandwich panel with lattice cores

Cited by 4 publications

References 30 publications

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO₂

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO₂

Effects of core geometry, silica nanoparticles, and polyurethane foam on the mechanical properties of a novel circular-shaped core sandwich panels under compression test: Experimental study

Vibration behavior of a carbon fiber‐reinforced polymer composite sandwich panel: Rhombus core versus elliptical core

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An experimental and numerical study on the vibration characteristics of glass fiber composite sandwich panel with lattice cores

Cited by 4 publications

References 30 publications

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO2

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO2

Effects of core geometry, silica nanoparticles, and polyurethane foam on the mechanical properties of a novel circular-shaped core sandwich panels under compression test: Experimental study

Vibration behavior of a carbon fiber‐reinforced polymer composite sandwich panel: Rhombus core versus elliptical core

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Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO₂

Experimental and numerical investigation of high‐velocity impact effects on composite sandwich panel with M‐shaped core reinforced by nano‐SiO₂