NASA Technical Reports Server (NASA) · 1980 · 53 citations · 0 references
Open access
EngineeringMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsStructural EngineeringStructural MaterialsComposite MaterialsDamage MechanicsDamage ToleranceFracture MechanicsImpact MechanicsStrength Of MaterialsCompression LoadingCyclic CompressionCyclic LoadingDelaminationDelamination Under ImpactImpact DamageImpact-induced DamageLow-velocity Impact
The influence of three different resin systems on the damage tolerance of graphite/polymer laminates was evaluated. Testing consisted of both static compression and cyclic compression evaluation of 10.2 by 15.2 by 0.5 cm (4 by 6 by 0.2 in) laminates with circular holes, simulated delaminations, and low velocity impact. Damage growth under steadily increasing compression and cyclic compression loading was monitored. Damage size and impact-induced failures for the three materials were compared. Of the three material systems evaluated, the one most tolerant to impact damage exhibited the least delamination within the cross section due to impact, the highest transverse tension strain to failure, and the largest crack opening force, as determined from double cantilever beam tests.