Dynamic delamination crack propagation in a graphite/epoxy laminate

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5284244

Grady, J E

Impact tests of (90/0)/sub 5s/ T-300/934 graphite/epoxy laminates of beam-like dimension with embedded delamination cracks were conducted. High speed photography (16,000 frames/sec) was used to record the impact response and subsequent crack propagation. From the photographic data, impact characteristics such as the contact duration and the dynamic response of the impact specimen were measured. In addition, the time of initiation of crack propagation and measurements of the subsequent crack length versus time were obtained. By changing the location of the embedded delamination in the specimens relative to the impact point, additional results were obtained on the variation of the threshold impact velocity necessary to cause crack propagation in the different specimen configurations. A further series of impact tests with instrumented targets was used to characterize the dynamic force history resulting from the high speed impact of a rubber ball.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5284244
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
CARBON
COMPOSITE MATERIALS
CRACK PROPAGATION
ELEMENTAL MINERALS
ELEMENTS
EPOXIDES
GRAPHITE
IMPACT TESTS
MATERIALS
MATERIALS TESTING
MECHANICAL TESTS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
TESTING
TIME DEPENDENCE