Experimental and numerical study on the low-velocity impact behavior of foam-core sandwich panels

Impact damage resistance of CFRP with nanoclay-filled epoxy matrix

An experimental investigation on the impact response of composite materials

On the impact response of sandwich composites with cores of balsa wood and PVC foam

This work investigates the effects of carbon/glass/basalt hybridization and fabric structure on the low velocity impact resistance of fibre reinforced plastic composites. Interply hybrid specimens used in the study were fabricated in a sandwich-like stacking sequence using a vacuum assisted resin infusion molding technique. Low velocity impact tests were carried out to study the effects of hybridization and fabric structure on the impact resistance of composite laminates. A continuum damage mechanical model was developed and validated for non-hybrid woven fabric laminates at different impact energy levels. Residual damage characteristics were identified using a 3D surface scanning system and an X-ray computed tomography (CT) method. On the basis of the experimental results, numerical simulation was also conducted to explore the damage mechanisms of the hybrid laminates. The study showed that: (a) hybrid laminates with carbon fibre as the core exhibited superior impact resistance for sandwich-like stacking sequence; (b) similar impact behaviors appeared for carbon laminates hybridised with either basalt or glass fibre; (c) for basalt fibre, weave fabric composite laminates exhibited better energy absorption capability and deformation resistance than cross-ply laminates reinforced in unidirectional fabrics.

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Low velocity impact behavior of interlayer hybrid composite laminates with carbon/glass/basalt fibres

Manufacturing and low-velocity impact characterization of foam filled 3-D integrated core sandwich composites with hybrid face sheets

Sandwich composites are widely used in many structural applications due to their superior bending stiffness, low weight and excellent thermal insulation, etc. Many innovative improvements have been made in the construction of sandwich composites in recent years to improve their impact resistance. Evaluation of dynamic properties of such laminates is of vital importance to the designer. In the current study, foam filled 3D integrated core sandwich composite laminates with and without additional face sheets were fabricated using vacuum assisted resin infusion molding process in multiple steps. For additional facing, plain weave S2-glass and twill weave carbon fabrics were used on top and bottom sides of the panels in four different monolithic (S2-glass only, carbon only) and hybrid (glass + carbon, one with S2-glass layer outside and other with carbon layer outside) combinations. High strain rate (HSR) response of integrated core sandwich composites was determined using a split Hopkinson pressure bar setup (SHPB) under compression loading at strain rates ranging from 742 to 1546 s−1. Dynamic response of different types of samples was compared in terms of the peak stress, modulus, strain at peak stress and failure modes.

M. Abdullah

Papers

Manufacturing and low-velocity impact characterization of foam filled 3-D integrated core sandwich composites with hybrid face sheets

Dynamic compression behavior of integrated core sandwich composites