Tensile and shear fracture behavior of fiber reinforced plastics at 77K irradiated by various radiation sources

摘要

Influence of radiation damage (gamma, electron, neutron) on mechanical properties of fiber reinforced plastics (FRPs) has been investigated. Different types of FRPs (two or three dimensional E-, S- or T-glass fiber reinforcement, epoxy or bismaleimide resin) have been irradiated at room temperature with 2 MeV electrons and (sup 6O)Co (gamma)-rays up to 1.8 (times) 1 0(sup 8) Gy as well as with different reactor spectra up to a fast neutron fluence of 5 (times) lO(sup 22) m(sup (minus)2) (E > 0.1 MeV). Tensile and intralaminar shear tests were carried out on the irradiated samples at 77 K. Some samples were irradiated at 5 K and tested at 77 K with and without an annealing cycle to room temperature. Results on the influence of these radiation conditions and of warm-up cycles on the mechanical properties of FRPs are compared and discussed.