Mechanical/thermal/vibrational properties of sisal, banana and coir hybrid natural composites by the addition of bio synthesized aluminium oxide nano powder

J Braz. Soc. Mech. Sci. Eng.

2020

In this research, chemically synthesized titanium oxide (TiO 2) nano-powder was utilized for upgrading mechanical and vibrational applications of pineapple, banana and sisal fibers. The substitution of TiO 2 upto 3% enhanced the tensile, impact and flexural strength of pineapple/sisal, sisal/banana and banana/pineapple hybrid combinations. Irregular dispersion of nano-filler at 4% degrades the mechanical stability of bio-composites. Pineapple and sisal hybrid combinations with 3% TiO 2 filler has the highest natural frequency due to excellent surface contact with resin/hybrid natural fibers and filter/ resin interface making higher stiffness to the composites with improved natural frequency. Natural frequency and damping properties enhanced with nano-filler mixing. The factors such as frictional properties and energy dissipation at maximum strain area in the filler make increment in the damping nature of the natural composites. In the equal fiber weight% of 35, pineapple-based hybrid composites make better damping rate by the higher interface thickness and smaller diameter of pineapple fiber than other two fibers.

Section: Damping Factor Of the Hybrid Combinationsmentioning

confidence: 99%

Effect of TiO2 nano-filler in mechanical and free vibration damping behavior of hybrid natural fiber composites

J Braz. Soc. Mech. Sci. Eng.

2020

“…The better bonding strength of hybrid composites enhanced the density and hardness nature of the composites. The filler addition was introduced to reduce the porous nature of composites and to improve the properties of natural fiber composites [33].…”

Section: Sem Testingmentioning

confidence: 99%

Abrasive water jet machining of Sisal/Pineapple epoxy hybrid composites with the addition of various fly ash filler

2020

Mater. Res. Express

Self Cite

This research was based on influence of various fly ash filler content in the machining properties of Pineapple (P)/Sisal (S) hybrid fiber reinforcement composites. Fly ash from bio waste materials of Bagasse (BGFA), Banana (BFA) and Coir (CFA) were used. High hardness nature of 3% BFA (22.73 HV) and 3% CFA (23.85 HV) reduces Material Removal Rate (MRR) and increases its surface roughness nature of the composites. Maximum MRR of 376.38 mm 3 min −1 was observed in 3% BGFA combinations with 250 MPa Water jet Pressure (WP), 1mm Standoff Distance (SOD) and 20 mm min −1 Traverse Speed (TS) as machining parameters. MRR of 353.64 and 352.76 mm 3 min −1 was found out with 1% CFA and 1% BFA combinations. Lower surface roughness of 6.39 μm, 6.71 μm and 6.75 μm was found in 3% BGFA, 1% CFA and 1% BFA based composites. Filler surface created a tight bonding with the matrix, which reduces the erosion of fiber particles at higher WP. Untreated fibers showed lesser machining properties due to low fiber/matrix bonding. SEM results showed reducing of cracks and matrix breakages by the substitution of filler powders.

“…Pectin, wax content, -OH groups and natural fats have been removed from the fiber and provide good bonding with the matrix structure. 24 Lack of bonding due to the untreated fibers reduces the capability to withstand penetrating abrasive water jet particle. This creates a rough surface in the composites with lesser machinability properties.…”

Section: Resultsmentioning

confidence: 99%

“…[15][16][17][18][19] The filler addition such as carbon black, flyash, coconut shell powder, nano alumina also improves the properties of the natural fiber composites. [20][21][22][23][24] The addition of carbon black filler enhanced the mechanical stability of pineapple fiber composites. 20 Flyash contains silica content in high proportion, enhancing the mechanical properties of the composites.…”

Section: Introductionmentioning

confidence: 99%

Machinability of hybrid natural fiber reinforced composites with cellulose micro filler incorporation

Journal of Composite Materials

Kavimani

2020

Self Cite

In the current scenario, the applications of natural fibers are increasing enormously due to their biodegradability, low-density and better mechanical properties. This research explains the machining nature of pineapple (P) and flax (F) fibers by the incorporation of cellulose micro filler (CMF). These epoxy-based composites were manufactured using compression moulding. In the machining process using abrasive water jet machining (AWJM), lower kerf angle of 1.31° and surface roughness of 5.1 µm were observed in 30% PF/2% cellulose micro filler hybrid epoxy combination. Agglomeration at higher filler incorporation causes decrease in machinability of hybrid 30% PF. Pineapple and flax hybrid fibers with 30 and 35 wt % showed better machinability at 2 and 3% cellulose micro filler addition. Scanning electron microscopy analysis after machining process showed reduction in flush off and pullouts of fiber by improved compaction with the epoxy matrix due to filler addition.