Effect of stacking sequence on R-curve behavior of glass/epoxy DCB laminates with 0°//0° crack interface

In this study, the influence of stacking sequence on mode I delamination resistance (R-curve) behavior of E-glass/epoxy laminated composites with an initial delamination between 0°//0° interface is experimentally investigated. To this end, symmetric double cantilever beam (DCB) specimens of stacking sequences; [0°12]s, [(0°/90°)3]2s and [0°/90°/ ± 45°/90°/0°]2s with two initial crack lengths are used. A pronounced R-curve behavior is observed on...