Role of laminate fracture energy on ballistic performance of glass composite laminates

Abstract This investigation examines the role of porosity in the perforation resistance of 3-D woven fiber reinforced epoxy panels under impact by rigid projectiles at velocities of 100 to 200 m/s. Incident and residual velocities are measured to determine the energy absorption by the target. To compare samples of different areal density, the energy is normalized by the target areal density. The sample responses segregate by porosity, and the more highly porous samples absorb a greater amount of specific energy. The reason for this is unclear but may be due to the deflection of matrix cracks by pores or due to the greater flexibility of the fibers to absorb energy through tensile straining. Although porosity is generally an undesirable property in textile composites, the induction of porosity may result in reduced panel weight without degradation of ballistic performance, a clear advantage for weight minimization.

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Ballistic Performance Evaluation of Kevlar-Glass Fibre Hybrid Composite Laminate against Medium Velocity Impact

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1165.47 ◽

2021 ◽

Vol 1165 ◽

pp. 47-64

Author(s):

Saurabh S. Kumar ◽

Rajesh G. Babu ◽

U. Magarajan

Keyword(s):

Energy Absorption ◽

Specific Energy ◽

Glass Fibre ◽

Hybrid Composite ◽

Composite Laminates ◽

Areal Density ◽

Ballistic Performance ◽

Performance Requirement ◽

Specific Energy Absorption ◽

Fabric Composite

In this paper, the post ballistic impact behaviour of kevlar-glass fibre hybrid composite laminates was investigated against 9×19 mm projectile. Eight different types of composite laminates with different ratios of kevlar woven fibre to glass fibre were fabricated using hand lay-up with epoxy matrix. Ballistic behaviour like ballistic Limit (V50), energy absorption, specific energy absorption and Back Face Signature (BFS) were studied after bullet impact. The results indicated that as the Percentage of glass fibre is increased there was a linear increment in the ballistic behaviour. Addition of 16% kevlar fabric, composite sample meets the performance requirement of NIJ0101.06 Level III-A. Since the maximum specific energy absorption was observed in Pure Kevlar samples and the adding of glass fibre increases the weight and Areal Density of the sample, further investigations need to be carried out to utilize the potential of glass fibre for ballistic applications.

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The role of the SnO2 interphase in an alumina/glass composite: a fractographic study

Journal of Materials Science ◽

10.1007/bf02387745 ◽

1991 ◽

Vol 26 (10) ◽

pp. 2743-2749 ◽

Cited By ~ 12

Author(s):

M. H. Siadati ◽

K. K. Chawla ◽

M. Ferber

Keyword(s):

Glass Composite ◽

Fractographic Study

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Response of Glass Fibre Reinforced Nano Epoxy Composite Subjected to Shear and Flexural Loads

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.11.3.19 ◽

2019 ◽

Vol 11 (3) ◽

Author(s):

R. Amitkumar ◽

Kanu Priya Jhanji ◽

P.S. Venkatanarayanan ◽

M.Joel Soris ◽

Nishanth Srikanth

Keyword(s):

Glass Fibre ◽

Composite Laminates ◽

Mechanical Performance ◽

Epoxy Composite ◽

Nano Particles ◽

Resin System ◽

Civil Structures ◽

Shear Loads ◽

Glass Fibre Reinforced

Use of composite laminates is found in various applications such as aircraft and automotive, sports, rocket parts and civil structures. Resin system of the polymer composites enacts a crucial role of binding the reinforcements properly to provide good mechanical properties. The presence of any kind of filler alters the properties of resin system which in turn also alters the mechanical behaviour of composite laminate. In the present work an attempt has been made to enhance the mechanical performance of glass fibre epoxy composites by embedding nano calcium carbonate particles in resin system. These particles were added in different weight fractions like 1, 3 and 5% and the response of GFRP nano composites were recorded under flexural and shear loads. Composite laminates with 3% wt. of nano particles have shown considerable improvement among the other laminates.

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