Mangalore Institute of Technology and Engineering VTU

Moodabidri, India

Mangalore Institute of Technology and Engineering VTU

Moodabidri, India
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Prasad G.L.E.,Mangalore Institute of Technology and Engineering VTU | Gowda B.S.K.,VTU PG Center | Velmurugan R.,Indian Institute of Technology Madras
Procedia Engineering | Year: 2017

In the present study both treated and untreated sisal polyester composites are tested to study its impact strength characteristics. ASTM D256 norms are followed to conduct the impact test on the specimens of 2 mm, 3 mm, 4 mm, 5 mm and 6 mm thicknesses for fiber volume of 10%, 15%, 20%, 25% and 30%. Random orientation of fibers was adopted. Length of fibers used in casting the specimen is as 10 mm. Here all the specimens are fabricated by using manually operated hot compression moulding technique. The results obtained from the present study have shown that impact strength increases with increase in the thickness. Untreated sisal polyester composite yielded its peak impact strength of 3.581 N-m at its 30% fiber volume fraction. Treated sisal polyester composite has shown highest impact strength of 1.962 N-m at its 30% fiber volume fraction. © 2017 The Authors.


Prasad G.L.E.,Mangalore Institute of Technology and Engineering VTU | Gowda B.S.K.,VTU PG Center | Velmurugan R.,Indian Institute of Technology Madras
Procedia Engineering | Year: 2017

To study the energy absorption capability of coir polyester composites, experimental studies were conducted as per ASTM D256 norms. Experiments were conducted on specimens with both untreated and treated with 5% NaOH solutions. The specimens of 2 mm, 3 mm, 4 mm, 5 mm and 6 mm thicknesses with fiber volume fraction of 10%, 15%, 20%, 25% and 30% were tested to study the variation of their impact strength with variation in specimen thickness and fiber volume fraction respectively. From the results it is observed that, as the thickness and fiber volume fraction of both treated and untreated coir polyester composite specimens increases, the impact strength also increases. Untreated coir polyester composite of 30% fiber volume fraction yielded its highest impact strength of 1.570 N-m. Similarly treated composite specimens also yielded its peak impact strength of 1.275 N-m at its 30% fiber volume fraction. © 2017 The Authors.

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