Abstract
Objective of this study is to clarify the crack-propagation properties of corrosion-resistant GFRP laminates under various acid stress environments, an effect of the constituents on fracture and the threshold properties of the crack propagation of woven C-glass cloth/vinylester laminates. This experiment is performed under descending load in HCl solution, in water and in air, and the crack-propagation behavior is depicted on the da/dt-K_I diagram. The crack-propagation rate in water is largely enhanced in comparison with that in the air and it is nearly as promoted as that in the acid solution. Then, the interfacial crack propagation behavior is investigated to confirm the role of the warp and weft fiber strand, using unidirectional specimens. As a result, it is suggested that the fiber bridging is observed, when the crack progress along the fiber direction.
