Influence of nanoclay and incident energy on impact resistance of S2-glass/epoxy composite laminates subjected to low velocity impact

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.

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Low velocity impact behaviour of polypropylene and epoxy composite laminates reinforced with a basalt woven fabric

10.1063/1.5045897 ◽

2018 ◽

Author(s):

Pietro Russo ◽

Giorgio Simeoli ◽

Francesca Cimino ◽

Maria Rosaria Ricciardi ◽

Valentina Lopresto ◽

...

Keyword(s):

Composite Laminates ◽

Epoxy Composite ◽

Woven Fabric ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Impact Behaviour

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The Effect of Hybridization of the Glass Fiber-Flexible Modified Epoxy and Rigid Epoxy Composite Properties under Low-Velocity Impact

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.255 ◽

2012 ◽

Vol 626 ◽

pp. 255-259

Author(s):

Siti Nur Liyana Mamauod ◽

Mohd Hanafiah Abidin ◽

Ahmad Zafir Romli

Keyword(s):

Glass Fiber ◽

Epoxy Composite ◽

Impact Resistance ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Rigid Polymer ◽

Brittle Phase ◽

The Impact ◽

Modified Epoxy

In the present study, experiment was carried out to investigate the impact properties of flexible and rigid polymer reinforced with E-glass fiber, under low velocity impact. The experimental work includes preparing the cured glassflexible modified epoxy and placed it onto the uncured glass-epoxy composite samples. The experimental results prove that the hybridization improves the impact strength of laminates. The flexibility segments that were introduced into the epoxy system increased the penetration impact resistance value. Hence more impact energy is required to perforate the samples compared to epoxy composite system which is brittle phase.

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