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A. A. Cenna

Bio: A. A. Cenna is an academic researcher from University of Newcastle. The author has contributed to research in topics: Particle & Light-gas gun. The author has an hindex of 6, co-authored 21 publications receiving 155 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a systematic study has been carried out to investigate the mechanical and physical properties of jute, bamboo and coir (brown and white) single fibers, and the tensile properties (tensile strength, Young's modulus and strain to failure) were determined by varying span length.
Abstract: A systematic study has been carried out to investigate the mechanical and physical properties of jute, bamboo and coir (brown and white) single fibers. The tensile properties (tensile strength, Young’s modulus and strain to failure) were determined by varying span length. Scanning electron microscopic analysis was also carried out to determine the physical properties of fibers in order to correlate with its strength, Young’s modulus and strain to failure. The Young’s modulus and strain to failure were corrected using newly developed equations. The study revealed that with increasing test span length the Young’s modulus increased and tensile strength as well as strain to failure decreased. This is because no extensometer could be used in this test set-up and machine displacement (denoted by α) was used for the modulus determination. It is also attributed that larger span length helps to minimize the machine displacement compared to smaller ones due to the reduced relative effect of slippage in the clamps. Among all fibers, the Young’s modulus of bamboo fiber was the highest. Jute fiber had smoother surface compared to other three examined fibers.

78 citations

Journal ArticleDOI
TL;DR: In this paper, the pressure fluctuation behavior in dense phase pneumatic conveying of powders was investigated and a wavelet analysis using the Daubechie 4 wavelet found that the amplitude of the oscillations increased along the pipeline.

21 citations

Journal ArticleDOI
10 May 2008-Wear
TL;DR: In this paper, the wear mechanisms in an alumina-conveying pipeline have been studied and a generic model is presented which has the potential to predict the wear life of a pneumatic conveying pipeline.

15 citations

Journal ArticleDOI
29 Jul 2011-Wear
TL;DR: In this article, single particle impact tests were performed using a high pressure gas gun at the University of Newcastle using specialized attachments, particles were impacted on polished ductile samples at velocities up to 200m−s−1.

14 citations

Journal ArticleDOI
TL;DR: In this article, a micro-sandblaster was used to evaluate the effect of different impact angles and particle velocities on the surface and subsurface properties of materials.

13 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors classified and described the various procedures that have been developed to extract fibres from raw bamboo culm and analyzed composite preparation from extracted bamboo fibres, including fiber extraction methods, fibre length, fibre size, resin application, temperature, moisture content and composite preparation techniques.

238 citations

Journal ArticleDOI
TL;DR: In this paper, the mechanical, hygral, and interfacial strength of continuous bamboo fiber reinforced epoxy composites were investigated, and the results showed that the tensile strength and Young's modulus of the composite increase with the decrease of the bamboo fiber diameter.
Abstract: This study is to investigate the mechanical, hygral, and interfacial strength of continuous bamboo fiber reinforced epoxy composites. The untreated and alkali-treated continuous bamboo fibers were prepared from cutting the nature bamboo culm. The basic characteristics of the bamboo fibers, such as density, equivalent diameter, and tensile properties were experimentally measured. The bamboo fiber reinforced epoxy (BF/EP) composites were fabricated by the resin transfer molding (RTM) process with the resulting fiber volume fraction about 42%. The strength of bamboo fiber was found to decrease with the alkaline treatment. However, alkali-treated bamboo fiber reinforced epoxy composites acquired better tensile strength than those with untreated bamboo fibers. The untreated bamboo fiber was believed to have weak interface with the epoxy resin, which was verified by the subsequent interface strength tests. The size effect of bamboo fibers on the tensile properties of the BF/EP composites were also studied. The results showed that the tensile strength and Young's modulus of the composite increase with the decrease of the bamboo fiber diameter. For the hygrothermal aging test, BF/EP composites are highly sensitive to moisture absorption, and the moisture has a detrimental effect on the mechanical properties of the BF/EP composite.

131 citations

Journal ArticleDOI
TL;DR: In this article, the thermal and mechanical properties of bamboo fiber reinforced composite (BFRC) derived from Gigantochloa scortechinii were analyzed using a thermogravimetric analysis and differential scanning calorimetric.
Abstract: This paper presents the thermal and mechanical properties of bamboo fiber reinforced composite (BFRC) derived from Gigantochloa scortechinii. The bamboo fibers were prepared through chemical treatment by sodium hydroxide (NaOH) followed by physical milling method. The thermal characteristics of the bamboo fiber and its polymer composite were analysed using a thermogravimetric analysis and differential scanning calorimetric. The functional groups and crystallinity of the fiber were analysed with Fourier transform infrared and x-ray diffraction spectroscopy. Meanwhile, the fiber morphology was examined using a scanning electron microscope. The BFRCs with fiber volume fractions ranging from 0 % to 40 % embedded in three thermoset resins (epoxy, polyester, vinyl ester) were subjected to tensile and flexural tests and the fracture pattern was examined. The NaOH concentration of 10 % with soaking duration of 48 h was found to produce a bamboo fiber with the highest ultimate tensile and modulus strength. The tensile and flexural properties of all the BFRCs were found to be directly proportional to the fiber volume fractions. It was found that the bamboo fiber reinforced epoxy composite (BFREC) with 40 % fiber volume fraction exhibited the highest tensile and flexural strength compared to polyester and vinyl ester composites. The method of bamboo fiber composite preparation in this work may serve as a useful guide to produce a strong BFRC for external strengthening of buildings and structures.

130 citations

Journal ArticleDOI
TL;DR: A detailed investigation of physical, mechanical and thermal properties of jute and bamboo fiber reinforced epoxy resin unidirectional void free composites was carried out in this article, where the composites were prepared by using vacuum technique.

102 citations

Journal ArticleDOI
TL;DR: A review of recent developments of bamboo fiber-based reinforced composites, its processing methodology, and applications is given in this article, where the focus is on low-cost polymeric-reinforced composites using entirely biodegradable fibers.
Abstract: The dominant emerging materials from more than 30 years ago are plastics, ceramics, and composite materials. Composite materials have steady growth in the volume and number of its applications as it enviably penetrates existing markets while creating new ones. Contemporary composite materials are well established in today’s market of specialty and everyday products with its proven worth as weight-saving materials. There is a current challenge of cost-effectiveness and environmental friendliness, thus leading to the search for low-cost polymeric-reinforced composites using entirely biodegradable fibers. Bamboo fibers have provided some response in the production of materials that are recyclable, biodegradable, and sustainable. The natural fibers yield composites with high strength-to-weight ratios as a function of the best properties of each component. Researchers have found sustainable high-end quality industrial products that can be generated from raw materials like bamboo fibers. Due to its high strength-weight ratio, bamboo fibers are often used to replace natural glass fiber. Thus, the much attention has been given to its composites with different matrix materials. This article gives a review of recent developments of bamboo fiber-based reinforced composites, its processing methodology, and applications.

90 citations