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), Journal Name: Journal of Composite Materials; (USA) Vol. 24; ISSN JCOMB; 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
Composite materials: Fatigue and fracture; Proceedings of the Second Symposium, Cincinnati, OH, Apr. 27, 28, 1987. Volume 2
Related Subjects
360603* -- Materials-- Properties
BENDING
CARBON
COMPOSITE MATERIALS
ELEMENTAL MINERALS
ELEMENTS
EPOXIDES
FRACTURE MECHANICS
FRACTURE PROPERTIES
GEOMETRY
GRAPHITE
IMPACT TESTS
MATERIALS
MATERIALS TESTING
MATHEMATICS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SERVICE LIFE
SHEAR
TESTING