Influence of Nano-Silica on Enhancing the Mechanical Properties of Sisal/Kevlar Fiber Reinforced Polyester Hybrid Compos
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ORIGINAL PAPER
Influence of Nano-Silica on Enhancing the Mechanical Properties of Sisal/Kevlar Fiber Reinforced Polyester Hybrid Composites M. Somaiah Chowdary 1 & G. Raghavendra 1
&
M. S. R. Niranjan Kumar 2 & S. Ojha 1,3 & Vasavi Boggarapu 1
Received: 27 September 2020 / Accepted: 16 November 2020 # Springer Nature B.V. 2020
Abstract In the fabrication of Sisal/Kevlar/Nano-silica reinforced polyester composites, the ultrasonic vibration was used in mixing the Nano-silica in polyester resin in which ultrasonic frequency of 15 kHz and with an 800 W power capacity was used. For uniform mixing of the nanoparticle in resin, an Ultrasonic probe was used. The Mechanical Properties of Sisal/Kevlar fiber, which are in mat form reinforced with polyester/Nano-silica, have been characterized. These composites have been fabricated using hand layup techniques by different wt.% of Nano Silica and different stacking sequences of fiber. The different wt.% are 2, 4, and 6 wt.%, and different stacking sequences are KSKS, SKKS, KSSK. The impact of the sonication effect on the mechanical properties was examined and compared. The addition of 4 wt% of Nano-silica in KSSK reported an increase of 23% of tensile strength, and 36% of flexural strength was observed. In KSKS, hybrid composites due to 4 wt.% silica addition 33% in tensile strength and 37% of flexural strength increases are found. The maximum tensile strength is obtained at 4 wt.% of Nano silica-reinforced with polyester with the stacking sequence KSSK and maximum flexural strength at 4 wt.% of Nano- silica with the stacking sequence KSKS. SEM analysis is also carried for the tested samples for failure analysis. Keywords Ultrasonication . Hybrid composite . Kevlar . Sisal . Nano-silica . Mechanical stirring
1 Introduction In the present generation of the composite world, hybrid composites play a vital and dynamic role in several manufacturing application areas. A hybrid composite consists of the polymer as matrix material and fiber/fibers and filler as reinforcement. A significant amount of research is going on for creating novel hybrid composites because of its lightweight, strength to weight ratio and improved mechanical properties. [1] Synthetic fiber-reinforced composite materials have turned to be very popular overages due to its exceptional mechanical
* G. Raghavendra [email protected] 1
Department of Mechanical Engineering, National Institute of Technology – Warangal, Warangal, Telangana 506004, India
2
Department of Mechanical Engineering, Prasad V. Potluri Siddhartha Institute of Technology, Kanuru, Andhra Pradesh 520007, India
3
Department of Mechanical Engineering, Kakatiya Institute of Technology and Science, Warangal, Telengana 506015, India
properties, lighter weightiness, unique flexibility, corrosion resistance, ease of manufacture, etc. One of the most durable synthetic fiber, known as Kevlar fiber, has very outstanding properties among synthetic fibers. Kevlar fiber is used in different industries and advanced machineries, such as hel
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