Natural frequency response of laminated hybrid composite beams with and without cutouts

Erkliğ, Ahmet; Bulut, Mehmet; Yeter, Eyüp

doi:10.1515/polyeng-2014-0061

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…Hybrid [(0C/90C)/(0K/90K)/(0G/90G)] s had the maximum natural frequency compared to other hybrids, and the [(0/90)3] s fibre orientation had the maximum natural frequency compared to other orientations. Moreover, [24] showed that the large cut-out size decreases the natural frequency, while the small cut-out size had a trivial effect on the natural frequency. Bulut et al [25] investigated the influence of adding S-glass interply to woven carbon-aramid intraply on the natural frequency and found that higher natural frequency can be obtained by positioning glass in the middle and (C+A) at the outer surface of the laminate, where the configuration [CA2G2] s had the highest natural frequency.…”

Section: Introductionmentioning

confidence: 97%

The Dynamic Behaviour of Symmetrical Laminated Nano-composite Containing Equal Numbers of Glass and Carbon Fibre Layers

Mohammed¹,

Hassan²,

Khdir³

2023

sv-jme

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Fibre-reinforced polymer composite has many uses in structural components that required high strength, stiffness, and damping capacity. Cross and quasi-laminated epoxy composites with and without nano Al2O3 were used in this investigation to determine flexural modulus, natural frequency, damping ratio, and mode shapes by using analytical, experimental, and numerical (ANSYS) methods. It was demonstrated that adding 2 % nano Al2O3 improved the flexural modulus and the damping ratio while decreased the natural frequency. Cross number 2 and quasi number 2 had the highest natural frequency for cross and quasi laminate groups which are equal to 23.5 Hz and 20.25 Hz experimentally, respectively. On the other hand, the higher damping ratio was achieved for cross number 1 with nano Al2O3 and quasi number 2 with nano Al2O3 for both cross and quasi laminates, which are equal to 0.707 % and 0.693 %, respectively. The flexural modulus and damping ratio are inversely related to each other. However, the novelty in this article is that by adding two glass plies at the outer surface of quasi group laminate the flexural modulus, natural frequency, and damping ratio are increased simultaneously, as in the configurations quasi number 2 and quasi number 2 with nano Al2O3 in comparison with quasi number 1 and quasi number 1 with nano Al2O3.

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Section: Introductionmentioning

confidence: 97%

The Dynamic Behaviour of Symmetrical Laminated Nano-composite Containing Equal Numbers of Glass and Carbon Fibre Layers

Mohammed¹,

Hassan²,

Khdir³

2023

sv-jme

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“…No significant effects in frequency were obtained from the cut-out position except eccentric and concentric cut-outs. Erkliğ et al (2014) examined the natural frequency responses of hybrid composites with or without cut-outs. The reinforcement fibers of Kevlar, glass, and carbon were used for the hybridization of composite laminates.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cut-outs on the Free Vibration Response of Basalt/Carbon Hybrid Composites

Özbek¹,

Bozkurt²

2021

Afyon Kocatepe University Journal of Sciences and Engineering

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The current work deals with an experimental investigation about the influence of cut-outs on dynamic characteristics of basalt/carbon hybrid fiber reinforced composite laminates. The composite samples have been fabricated via vacuum assisted resin transfer molding technique and cut-outs in the form of triangular, square and circular shapes with equal areas have been processed on them to systematically analyze the influences of cut-outs. The dynamic characteristics of the samples have been examined by conducting free vibration-damping tests and expressed in terms of natural frequency and damping ratio using the frequency response and time-acceleration response. The results show that the damping characteristics of the composite samples can be remarkably improved with the help of cut-outs which provide improvements approximately between 2.41% and 16.65% in damping ratio values. The maximum and minimum variations in damping ratio have observed for non-hybrid carbon fiber reinforced composite samples with triangular cut-out (T-C6) and hybrid basalt/carbon fiber reinforced composite samples with circular cut-out (C-B6), respectively. On the other hand, the presence of cutouts have led to decreases in natural frequency values as a result of reduction in stiffness caused by the cut-outs. This point out that employment of cut-outs can be a promising application to meet the natural frequency requirements of engineering systems constructed with hybrid fiber reinforced composite laminates.

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“…Kallannavar et al 29 studied the effect of moisture and temperature on vibration characteristics of hybrid composite sandwich plates. Erklig et al 30 studied the Natural frequency responses of hybrid composite laminates with and without cutouts. Kumar and Singh 31 investigated the effect of boundary conditions on the buckling and post buckling responses of composite laminates with various shaped cutouts.…”

Section: Introductionmentioning

confidence: 99%

Effects of different interlaminar hybridization and cutout sizes on the vibration and buckling characteristics of fiber metal composite laminates under partial edge loads

Muddappa

Rajanna

Giridhara

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Fiber reinforced polymer composites are quickly gaining market share in structural applications, but further growth is limited by their lack of toughness. Fiber hybridization is a promising strategy to toughen composite materials. By combining two or more fiber types, these hybrid composites offer a better balance in mechanical properties than non-hybrid composites. This study presents the effect of different interlaminar hybridization and cutout sizes on the vibration and buckling characteristics of hybrid fiber metal laminates (HFMLs) subjected to partial edge loads by developing finite element formulation. Since the stress distribution within the plate element is highly non-uniform in nature, the dynamic approach has been used to solve the buckling problems wherein two sets of boundary conditions are used, one for pre-buckling stresses and other one for buckling load calculations. A 9-noded heterosis plate element has been used to discretize the plate by taking into account the effect of shear deformation and rotary inertia. The present study consists of aluminum metal face sheets bound with four layered symmetric hybrid cross-ply laminate schemes. In this scheme, six different hybrid combinations have been considered. The performance of each hybrid combination is investigated under various loading combinations. Further, the effect of different parameters such as boundary condition, cutout ratio, width and position of localized edge loads, plate aspect ratio, and hybrid configurations are included in this work. It is revealed from the study that the hybrid configurations under different cutouts significantly affect the vibration and buckling characteristics under different localized edge loads.

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Natural frequency response of laminated hybrid composite beams with and without cutouts

Cited by 8 publications

References 14 publications

The Dynamic Behaviour of Symmetrical Laminated Nano-composite Containing Equal Numbers of Glass and Carbon Fibre Layers

The Dynamic Behaviour of Symmetrical Laminated Nano-composite Containing Equal Numbers of Glass and Carbon Fibre Layers

Effect of Cut-outs on the Free Vibration Response of Basalt/Carbon Hybrid Composites

Effects of different interlaminar hybridization and cutout sizes on the vibration and buckling characteristics of fiber metal composite laminates under partial edge loads

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