Abstract In this paper, pultruded GFRP bars are investigated to determine their fracture properties. The double cantilever beam test (DCB) is used assess behavior under mode I loading conditions. However, due the presence of R-curve effect (variable energy dependent on length crack), it necessary introduce a nonstandard approach mixed experimental–numerical proposed deal with issue. Numerical s...

Delamination is a predominant failure mechanism in composite structures. In the present study, double cantilever beam tests were performed to investigate the effects of temperature and fiber orientation on the Mode I interlaminar fracture toughness, G I , of carbon fiber-reinforced epoxy composites, T800H/#3631. The values of G I for three kinds of laminates, [0 12 //0 12 ], [22.5/-22.5/0 8 /-2...