Mode II interlaminar fracture of the center notch flexural specimen under impact loading
- Nippon Steel Corp., Kawasaki (Japan) Delaware Univ., Newark (USA)
The mode II interlaminar fracture of unidirectional graphite/epoxy (AS4/2220-3) and graphite/PEEK (APC-2) composite laminates subjected to impact loading is investigated using the center-notch flexural (CNF) test specimen. Experimentally, instrumented impact testing of the CNF specimen enables the impact force history and the absorbed energy during delamination propagation to be estimated. SEM examination is conducted to assess the influence of impact loading on fracture morphology in the crack initiation and propagation regions of the fracture surface. The initiation toughness under impact loading was approximately 20 and 28 percent lower than the static values for AS4/2220-3 and APC-2, respectively. A 24 and 44 percent reduction in fracture toughness is measured for the AS4/2220-3 and APC-2 composite materials, respectively. 42 refs.
- OSTI ID:
- 7171234
- Journal Information:
- Journal of Composite Materials; (USA), Vol. 24; ISSN 0021-9983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of initial delamination on Mode 1 and Mode 2 interlaminar fracture toughness and fatigue fracture threshold
Stress-ratio effect on mode II propagation of interlaminar fatigue cracks in graphite/epoxy composites
Related Subjects
EPOXIDES
FRACTURE PROPERTIES
GRAPHITE
BENDING
COMPOSITE MATERIALS
FRACTURE MECHANICS
GEOMETRY
IMPACT TESTS
SERVICE LIFE
SHEAR
CARBON
ELEMENTAL MINERALS
ELEMENTS
MATERIALS
MATERIALS TESTING
MATHEMATICS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
TESTING
360603* - Materials- Properties