Influence of fiber orientation and thickness on the response of glass/epoxy composites subjected to impact loading |
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| Affiliation: | 1. Defence Metalurgical Research Laboratory, Kanchanbagh, Hyderabad, 500 058, India;2. Jawaharlal Nehru Technological University, Hyderabad 500072, India;1. Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai 600 036, India;2. Department of Applied Mechanics, Indian Institute of Technology Delhi, New Delhi 110 016, India |
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| Abstract: | Composite laminates, made of glass/epoxy using compression molding technique, were subjected to impact loading. The ballistic limit and energy absorption capacity of the laminates were obtained. Experiments were carried out to study the effect of fiber orientation and thicknesses on ballistic limit and energy absorption of the laminates, by using a rigid conical bullet having 9.5 mm diameter and mass of 7.5 g in an air gun. Analytical expressions were obtained to find the ballistic limit, residual velocity and energy absorption capacity of the laminates. The expressions obtained by considering the various damage modes, which were involved in penetration, when laminates subjected to impact loading. The values obtained from analysis were compared with experimental results and good agreement was found. The strain rate sensitivity of the glass/epoxy composites was considered for analysis. |
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| Keywords: | A. Glass fibers B. Impact behavior B. Delamination C. Analytical modeling |
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