Crushing characteristics of composite tubes with 'near-elliptical' cross sections

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Composite Materials; (United States)

DOI:https://doi.org/10.1177/002199839202601203· OSTI ID:6957340

Farley, G L; Jones, R M ^[1]

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1. U.S. Army, Aerostructures Directorate (United States) NASA, Langley Research Center, Hampton, VA (United States) Virginia Polytechnic Institute and State University, Blacksburg (United States)

An experimental investigation was conducted to determine whether the energy-absorption capability of near-elliptical cross-section composite tubular specimens is a function of included angle. Each half of the near-elliptical cross-section tube is a segment of a circle. The included angle is the angle created by radial lines extending from the center of the circular segment to the ends of the circular segment. Graphite- and Kevlar-reinforced epoxy material was used to fabricate specimens. Tube internal diameters were 2.54, 3.81, and 7.62 cm, and included angles were 180, 160, 135, and 90 degrees. Based upon the test results from these tubes, energy-absorption capability increased between 10 and 30 percent as included angle decreased between 180 and 90 degrees for the materials evaluated. Energy-absorption capability was a decreasing nonlinear function of the ratio of tube internal diameter to wall thickness. 15 refs.

• OSTI ID: 6957340
• Journal Information: Journal of Composite Materials; (United States), Journal Name: Journal of Composite Materials; (United States) Vol. 26:12; ISSN JCOMBI; ISSN 0021-9983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ABSORPTION
CARBON
COMMINUTION
COMPOSITE MATERIALS
CRUSHING
DESTRUCTIVE TESTING
ELEMENTAL MINERALS
ELEMENTS
ENERGY ABSORPTION
EPOXIDES
FAILURES
GEOMETRY
GRAPHITE
MATERIALS
MATERIALS TESTING
MATHEMATICS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PIPES
PLASTICS
SORPTION
SYNTHETIC MATERIALS
TESTING