1995 Volume 61 Issue 581 Pages 139-145
Woven GFRP laminates composed of epoxy resin were used as specimens to investigate the effect of textile structure on growth of interlaminar delamination under repeated mixed-mode loading. Different shapes of specimens were prepared with mode ratios (GI/GII)=3.76, 1.33 and 0.500, and the reinforced fibers were of two different textures ; one was standard texture (ST), the other was loose-weft texture (LT). Results of static ELS test and fatigue ELS test showed that in the ST case, the fracture toughness of the specimen with GI/GII=0.500 was the lowest and the crack growth rate of the specimen with GI/GII=0.500 was the highest. In the LT case, however, the fracture toughness of the specimen with GI/GII=1.33 was the lowest and the crack growth rate of the specimen with GI/GII=1.33 was the highest. Results of microscopic observation showed that the fracture pattern of the specimen with GI/GII=1.33. was mixture of those of samples with GI/GII=3.76 and 0.500. In modeling of fracture by maximum stress theory, the deformation and failure of specimens with GI/GII=3.76 and 0.500 were simulated by FEM. The analytical results showed good agreement with the experimental results.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
