Title: LOW-VELOCITY IMPACT BEHAVIOUR OF 3-D GLASS FIBRE HOLLOW INTEGRATED CORE SANDWICH COMPOSITES
Page Range: p.175-179
Author(s): Cao H; Qian K; Wei Q; Li H
File size: 212K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.4
Abstract
In the current work, 3-D glass fibre woven fabric-reinforced composites were fabricated by impregnating epoxy resin in a hand lay-up procedure for the hollow integrated core sandwich structure. Four types of 3-D structures were investigated in terms of the impact properties as a function of the z-direction fibre length (5, 6 and 7 mm) and covered skins (covered with aluminium) in core structures. Impact properties including peak load, time to peak load, and absorbed energy were evaluated. It was found that the 3-D hollow integrated core sandwich composites covered with aluminium skin considerably enhanced the impact resistance. Photographs of the impact damage taken after impact tests were analyzed and discussed in terms of a hollowing on the front face sheet against the load applied, and whitening spread in the impact point on the back face sheet of the composites was also studied. 10 Refs.