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The objective of this investigation was to estimate the creep life of glass fiber reinforced plastic (GFRP) materials subjected to stress-corrosive environments using acoustic emission (AE). The laminates were fabricated using combinations of rigid bisphenolic polyester resin (LP-1), flexible vinylester resin (R806), random fiber mat and woven cloth. The creep tests were conducted in 5% nitric acid (HNO3) environment. The rigid matrix composites displayed higher AE count rate than the flexible matrix composites. For given creep testing conditions, the woven cloth reinforced specimens displayed higher number of AE counts than the random mat reinforced specimens. The creep life decreased with increasing creep stress, whereas the AE count rate increased with increasing creep stress. A linear relationship was found between the creep life and the AE count rate.
GFRP laminates, durability, acoustic emission, stress-corrosion, environments, creep
Manager, Seikow Chemical Engineering & Machinery Company, Amagasaki,
Assistant Professor, Kyoto Institute of Technology, Kyoto,
Associate Professor, Kyoto Institute of Technology, Kyoto,