Influence of electron radiation and temperature on the cyclic, matrix dominated response of graphite-epoxy

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · J. Reinf. Plast. Compos.; (United States)

DOI:https://doi.org/10.1177/073168448700600303· OSTI ID:6015972

Reed, S M; Herakovich, C T; Sykes, Jr, G F

The effects of electron radiation and elevated temperature on the matrix-dominated cyclic response of standard T300/934 and a chemically modified T300/934 graphite-epoxy are characterized. Both materials were subjected to 1.0 x 10 to the 10th rads of 1.0 MeV electron irradiation, under vacuum, to simulate 30 years in geosynchronous orbit. Cyclic tests were performed at room temperature and elevated temperature (121 C) on 4-ply unidirectional laminates to characterize the effects associated with irradiation and elevated temperature. Both materials exhibited energy dissipation in their response at elevated temperature. The irradiated modified material also exhibited energy dissipation at room temperature. The combination of elevated temperature and irradiation resulted in the most severe effects in the form of lower proportional limits, and greater energy dissipation. Dynamic-mechanical analysis demonstrated that the glass transition temperature, T(g), of the standard material was lowered 39 C by irradiation, wereas the T(g) of the modified material was lowered 28 C by irradiation. Thermomechanical analysis showed the occurrence of volatile products generated upon heating of the irradiated materials. 7 references.

• Research Organization: Virginia Polytechnic Institute and State Univ., Blacksburg; NASA, Langley Research Center, Hampton, VA
• OSTI ID: 6015972
• Journal Information: J. Reinf. Plast. Compos.; (United States), Journal Name: J. Reinf. Plast. Compos.; (United States) Vol. 6; ISSN JRPCD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
CARBON
COMPOSITE MATERIALS
ELASTICITY
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
EPOXIDES
FERMIONS
GRAPHITE
LEPTONS
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
TEMPERATURE EFFECTS
TENSILE PROPERTIES
TEST FACILITIES