Experimental and theoretical studies on the interlaminar shear strength of graphite fiber/epoxy composites exposed to ionizing radiation

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5682663

Park, J S

In an effort to predict the long-term durability of graphite fiber/epoxy composites in a space environment, interlaminar shear strength of the composites was measured as a function of 0.5 MeV electron radiation dosage. For the interlaminar shear strength measurements, a notch method (ASTM D3846) was used with and without side-supports. The supports were used to prevent peeling or bending during the test. The interlaminar shear strengths of both T300/5208 longitudinal and T300/5209 longitudinal composite systems in crease monotonically with radiation when the test is done with the support. When the test is carried out without the support, the interlaminar shear strength increases initially but then decreases with further radiation. It is also observed that the interlaminar shear strength of the unsupported case is much lower than that of the supported case. The generalized Kaelble's theory and the results from the Finite Element Analysis suggests that the interfacial shear strength increases with radiation as the stress concentration factor increases with radiation.

• Research Organization: North Carolina State Univ., Raleigh, NC (USA)
• OSTI ID: 5682663
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
BEAMS
CARBON
COMPOSITE MATERIALS
ELECTRON BEAMS
ELEMENTAL MINERALS
ELEMENTS
ENERGY RANGE
EPOXIDES
FIBERS
GRAPHITE
KEV RANGE
KEV RANGE 100-1000
LEPTON BEAMS
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PARTICLE BEAMS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SHEAR PROPERTIES