Abstract
This paper describes fiber strength degradation of FRP under constant loading in water was investigated using a single fiber composite (SFC) specimen. In experiments, the fiber strength degradation in the SFC specimen was accelerated by water and applied stress. The fiber strength was evaluated by a fragmentation test. We assumed the degradation was caused by microscopic crack propagation and the propagation was accelerated by water and applied stress. Therefore the degradation mechanisms based on the microscopic crack propagation was established to predict the degradation in the SFC specimen. Finally, the experimental results were predicted using the degradation mechanisms.
