Influence of Incident Energy on Sisal/Epoxy Composite Subjected to Low Velocity Impact and Damage Characterization Using Ultrasonic C-Scan

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Saravanan Mahesh
Muthukumar Chandrasekar
R. Asokan
Yaddula Chandra Mouli
Katta Sridhar
Vadlamudi Venkata Krishna Vamsi
Maripati Dinesh Varma
Pappakudi Srinivasan Venkatanarayanan

Abstract

Impact resistance is an inevitable characteristic of the composites employed in the high performance structural applications. Due to the growing interest in the use of sisal fibre as reinforcement in the polymer composites, it is required to determine the response of sisal/epoxy composites to low velocity impact at high incident energies where perforation can occur and assess the damage characteristics using a non-destructive technique. In this work, sisal/epoxy composites were subjected to drop weight impact in the velocity range of 3 m/s to 5 m/s at different energy levels between 20 J to 50 J according to the ASTM D7136. Based on the results observed, it is concluded that both the peak load and absorbed energy increased with the increasing incident energy level up to 40 J. At 50 J, perforation occurred and the maximum deformation was approximately 22 mm for the sisal/ epoxy composite. Damage characteristics and failure behaviour of the composite at different incident energies was examined from the visual images of the front and back face of the composite. The quantitative assessment of crack propagation in the sisal/epoxy composite and the damage area were determined from the ultrasonic C-scan images of the sample post impact at various energy levels.

Article Details

How to Cite
Mahesh, S., Chandrasekar, M., Asokan, R., Mouli, Y. C., Sridhar, K., Krishna Vamsi, V. V., Varma, M. D., & Venkatanarayanan, P. S. (2021). Influence of Incident Energy on Sisal/Epoxy Composite Subjected to Low Velocity Impact and Damage Characterization Using Ultrasonic C-Scan. Applied Science and Engineering Progress, 15(1). https://doi.org/10.14416/j.asep.2021.07.005
Section
Research Articles

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