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Interlaminar shear behavior of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid composite laminates |
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| Authors: | AI Selmy AR Elsesi NA Azab MA Abd El-baky |
| Affiliation: | 1. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK;2. Advanced Composites Research Group, School of Mechanical and Aerospace Engineering, Queen`s University Belfast, Ashby Building, Belfast BT9 5AH, UK |
| Abstract: | The interlaminar shear behavior of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid composites was studied with short beam shear bending test. Random glass fiber (R)/epoxy means chopped fiber composite having short discontinuous fiber randomly dispersed in epoxy matrix. The effect of stacking sequence and unidirectional glass fiber relative volume fraction (VfU/VfT) on the interlaminar shear strength (ILSS) of the manufactured composites has been investigated experimentally and theoretically. The laminates were fabricated by hand lay-up technique with 5 plies. Two non-hybrid composite laminates R]5 and U]5 were fabricated using the same fabrication technique for the comparison purpose. The average thickness of the manufactured laminates is 5.5 ± 0.2 mm and the total fiber volume fraction (VfT) is 37%. Failure modes of all specimens were investigated. Experimental results indicated that the ILSS of U]5 is higher than those of hybrid and R]5 composite. Hybrid composites have higher ILSS than that of random composites. The stacking sequence and (VfU/VfT) ratio have a detectable effect on ILSS of the investigated composites. |
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