Physical and mechanical properties of Entada mannii particulates reinforced composites

et al. 2023

Sci Rep

The mechanical properties of coconut shell ash (CSA) reinforced polyester composite have been optimized. Various test specimens were developed by dispersing 10, 20, 30 and 40 wt.%, of CSA in unsaturated polyester resin in decreasing particle sizes of 40, 30, and 20 µm in an open mould using hand lay-up technique. Tensile, flexural, and impact strengths, as well as tensile and flexural moduli and Shore D hardness of all test samples were determined. The results showed that 10–20 wt.% CSA increased tensile, flexural, impact strengths and flexural modulus for all particle sizes, but 30–40 wt. % CSA engendered depreciation in corresponding performance. For all particle sizes, 10–40 wt. percent CSA resulted in an increase in tensile strength, whereas 10–40 wt. percent resulted into a linear increase in Shore D hardness. Further observation portrayed that in each case, the finest CSA (20 µm) have the optimum result. Statistical analysis carried out on experimental outcomes confirmed the experimental variables (particle proportion and sizes) to be significant. From the surface plot, the strength responses revealed more dependence on the individual variables than their interactions. Regression models developed for individual responses are termed statistically fit in representing the experimental data.

Section: Methodssupporting

confidence: 81%

Optimization of the mechanical properties of polyester/coconut shell ash (CSA) composite for light-weight engineering applications

Daramola

Akinwande

et al. 2023

Sci Rep

“…However, Entada mannii plant is a liana plant and climber that entangles the trunk on their host. The plant stem is structured with arrangements of fiber bundles within the bark stem [22]. The fibers are twined around the bark stem, which enhanced the bending and torsional strength for the plant system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Water Diffusion Mechanism on Mechanical Properties of Polypropylene Composites

Balogun

International Journal of Polymer Science

Omotoyinbo

et al. 2020

This study evaluates the water diffusion mechanism on mechanical properties of polypropylene reinforced composites. Compounding of the composites into sheets was carried out using the compression moulding techniques by incorporating varying weight percentage of fibers and polypropylene. Mechanical properties of the composites were assessed according to ASTM standards, while the composite fracture surface was examined using a scanning electron microscope. The water absorption behaviour and diffusion mechanisms on mechanical properties of fabricated composites were analysed using a water immersion test and the Fickian diffusion model. The results show that mechanical properties of all polypropylene reinforced composites under dry condition was higher than wet condition. The composites reinforced with 7 wt.% (KOH and NaOH) fibers follow a consistent trend and gave the highest tensile strength and tensile modulus in comparison with pure PP (polypropylene). Addition of fibers into the polypropylene matrix gradually decreases composites impact strength with exception to 3 wt.% and 5 wt.% composites. The hardness properties of reinforced composites were steadily increased as the fiber loading increases which signify strong fiber-matrix bonding. The percentage of water absorbed for all reinforced composites increased as the fiber weight increases and slowly flattened off after 10 days of saturation. The morphological study revealed fiber pullout and delamination of reinforced composites attributed to poor fiber-matrix adhesion amount to water intake. The diffusion transport mechanism of polypropylene composites was observed to obey the Fickian diffusion model.

“…A review by Yekinni et al [18] reported that fine particles of SiC, Al2O3, graphene and aluminide are harder reinforcements materials and therefore have the capacity to improve the hardness and strength of metal matrix composites. This improvement could be credited to good reinforcement particles wettability within the matrix which enhances the adhesion between reinforcements and the matrix, thus impeding the movement of the crack propagation on the application of a pulling load [27]. The reinforcement particles penetrates into the matrix interphase and displaces gas bubbles from being trapped within the AA6063 matrix.…”

Section: Figure 1 Percentage Porosity Of the Developed Hybrid Compositesmentioning

confidence: 99%

Mechanical Characterization and Numerical Optimization of Aluminum Matrix Hybrid Composite

Edoziuno

Adesina

et al. 2022

MSF

Hybridization of aluminium matrix composite is with a view to offset the properties deficient in one composite reinforcement. The present investigation involves a comparative study of AA6063 matrix composites with single reinforcement of Al2O3, SiC, graphene respectively and various hybridized proportions of the same reinforcements. Physical (density and %porosity) and mechanical (tensile strength, fracture toughness, %elongation, elastic modulus, etc.) properties of composites developed via solidification processing technique were evaluated. The porosity of all the composites falls below the maximum acceptable limit for cast metal matrix composite. Maximum values for UTS, %elongation and absorbed energy at maximum stress was obtained by hybrid composite with 4wt% Al2O3, SiC and 2wt% graphene, while the composite with the highest single reinforcement of graphene have the highest value for elastic modulus and fracture toughness. Numerical optimization results show that a matrix and hybrid reinforcements contents of AA6063 (91.413wt.%), SiC (3.679wt.%), Al2O3 (0.277wt.%), and graphene (4.632wt.%) respectively, will result in optimal values for the evaluated properties.