Free Vibration Test for Damping Characteristics of Hybrid Polyester Matrix Composite with Carbon Particles

Karthik, K.; Renish, R. Rohith; Ahmed, I. Irfan; Projoth, T. Niruban

doi:10.4028/www.scientific.net/nhc.11.1

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…It is apparent that C2WN and Q2WN laminates have maximum flexural modulus E b in the cross and quasi groups, respectively. In spite of the presence of two glass layers on the exterior of both laminates, it is in contrast with the results of [16] because of the effect of element Q11, Q12, and Q66 in [Q ij ] matrix of the 90º glass layer. By adding 2 % nano Al 2 O 3 , the natural frequency for all laminates slightly dropped despite the increase in flexural modulus, similar to the results of research [14].…”

Section: Analytical Workcontrasting

confidence: 72%

“…Increasing the angle of fibre orientation between 0° and 45° leads to decrease natural frequency and increase damping ratio for cantilever boundary condition and vice versa for free condition. Researchers [4] to [8], [16] to [19] investigated the mechanical and dynamic behaviour of hybrid glass/carbon laminated composite. Murrugan et al [4] concluded that the presence of carbon fibre in the middle of the laminated composite H1[GCCG] increases tensile strength, tensile modulus, and damping ratio, while the presence of carbon fibre in the outer surface of the laminated composite H2[CGGC] increases flexural strength, flexural modulus, and natural frequency for (50 % carbon: 50 % glass) fibre addition.…”

Section: Introductionmentioning

confidence: 99%

“…They found the best arrangement of fibres for higher dynamic properties by using the Taguchi program. Karthik et al [16] investigated the damping properties of E-glass chopped mat/woven carbon hybrid with four different volume fractions in epoxy matrix and polyester matrix. They demonstrated that the damping capacity increased with increasing glass volume fraction for both matrices; furthermore, the addition of 5 % carbon fibre gave the best damping behaviour and natural frequency for structural composite.…”

Section: Introductionmentioning

confidence: 99%

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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: Analytical Workcontrasting

confidence: 72%