Abstract
Fracture toughness of chopped strand glass fiber reinforced particle-filled polymer composite beams was investigated in Mode I and Mode III loading conditions using three-point bend tests. Effects of crack angles on fracture behavior were also studied. The specimens, which have inclined crack at an angle θ to the axis of the specimens, were used to carry out the tests. The specimens were tested with inclination angles 30°, 45°, 60° and 75°. The results are compared with the values of K IC obtained using conventional ( θ=90° ) specimens. In addition, J integrals were also determined. J IC increases continuously with increasing in crack angle from θ=30° to θ=90°. In contrast, J IIIC decreases with the crack inclination angle θ from 30° to 90°.
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