Vibrational analysis of coconut fiber-PP composites

Gelfuso, Maria Virgínia; Thomazini, Daniel; Souza, Júlio César Silva de; Lima, José Juliano de

doi:10.1590/s1516-14392013005000200

Cited by 24 publications

(11 citation statements)

References 10 publications

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“…This can be proven by the high number of patents, papers and products already marketed [1][2][3][4][5][6] . Piassava fibers are extracted from the palm tree Attalea funifera Martius.…”

Section: Introducionmentioning

confidence: 99%

Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

et al. 2015

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“…This can be proven by the high number of patents, papers and products already marketed [1][2][3][4][5][6] . Piassava fibers are extracted from the palm tree Attalea funifera Martius.…”

Section: Introducionmentioning

confidence: 99%

Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

et al. 2015

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“…The loss factor was firstly calculated using the half-power bandwidth, as described in ASTM E756. Using the response curve of each specimen, the resonant frequency was measured, and then the frequencies above and below (by a value of 3 dB) were measured, as shown in Figure 3 [31][32][33].…”

Section: Lnmentioning

confidence: 99%

Damping Properties of Flax/Carbon Hybrid Epoxy/Fibre-Reinforced Composites for Automotive Semi-Structural Applications

Fairlie

Njuguna

2020

Fibers

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The ever-increasing demand for environmentally friendly biocomposites for use in various engineering applications requires a strong understanding of these materials properties, especially in automotive applications. This study focused on investigating how the stacking sequence and fibre orientation impacts the damping properties of hybrid flax/carbon fibre-reinforced composites. Different hybrid carbon fibre/flax fibre-reinforced composites using epoxy resin as the matrix were manufactured using vacuum-assisted resin infusion moulding technique. Each composite material was then tested for tensile properties using a universal testing machine, and the damping experiment was conducted using an impulse hammer and a Laser Doppler Vibrometer. The tensile study found out that adding a flax layer to the external layers of carbon fibre laminate reduced Young’s modulus by 28% for one layer and 45% for two layers. It was noted that when the fibre orientation of the internal layer of [C/F2/C]s was replaced with two ±45° layers, this had a very little effect on Young’s modulus but reduced the ultimate tensile strength by 61%. This experimental study also showed that the most important layer when it comes to damping properties is the external layers. By adding an external flax layer into an epoxy/carbon fibre-reinforced composite considerably enhanced its damping ratio by 53.6% and by adding two layers increased it by 94%. The results indicated a high potential for the automotive semi-structural applications to improve damping properties of the vehicle.

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“…The damping ratio ζ is defined in equation 9, where ω n is the respective eigenfrequency and ω 1 and ω 2 are defined by the frequency response function at the position of 2 − 1 2 a, with a as maximum amplitude response of the eigenfrequency. This method is based on ASTM Standard E756 [12]. 442.9 0.0156 8.…”

Section: B Experimental Modal Analysismentioning

confidence: 99%

An Eco-Efficient Helicopter Tailplane Hybridized from Flax, Balsa and Carbon

Strohrmann

Hajek

2019

AIAA Scitech 2019 Forum

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A tailplane for an ultralight helicopter was redesigned with the goal of using bio-based materials in a high proportion. Structural requirements were set to the national ultralight certification standards and were also adapted from the performance of the initial design tailplane, which was made of carbon prepreg materials and a foam core. In order to pursue this goal, pre-impregnated flax fiber composites, in combination with a balsa wood core and a small proportion of carbon fiber reinforcements, were used to design a new tailplane. A finite element model was developed, fed by material data from tensile tests and evolving iteratively from coupon and sub-component bending tests. Finally, a 450 mm section of the resulting design was built and a bio-based mass content of approximately 55 % was achieved. The new, hybrid version was analyzed experimentally in terms of weight, stiffness, strength/ failure, damping, and embodied energy, where benchmark data was obtained from either the reference tailplane or the certification specifications. Benefits of the new design were identified in a 2-8 times higher damping ratio, 65% less embodied energy (76.90 MJ kg −1), and reduced carbon footprint (5 kg kg −1), while weight, stiffness, and strength were performing in a sufficient and comparative manner as the reference.

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Vibrational analysis of coconut fiber-PP composites

Cited by 24 publications

References 10 publications

Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

Effect of the Glycerol and Lignin Extracted from Piassava Fiber in Cassava and Corn Starch Films

Damping Properties of Flax/Carbon Hybrid Epoxy/Fibre-Reinforced Composites for Automotive Semi-Structural Applications

An Eco-Efficient Helicopter Tailplane Hybridized from Flax, Balsa and Carbon

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