Notch-Tip Damage and Translaminar Fracture Toughness Measurements from Carbon/Epoxy Laminates
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
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Notched 04590-45 carbonepoxy laminates were used to study translaminar fracture, where through-thickness cracking propagates across fibers and laminae. Radiographs of damage were compared with crack growth determined from load-versus-deflection plots using elastic fracture mechanics. Comparison of damage at the notch tip with fracture mechanics evaluation identified some materialtest conditions for which a critical value of fracture toughness is a useful concept. For other condition the extent of damage in the specimen showed that the concept of fracture toughness is not directly applicable. CarbonEpoxy, Laminates, Composite materials, Notch damage, Radiography, Fracture mechanics, Fracture toughness.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods
- Solid State Physics