Combined experimental–numerical mode I fracture characterization of the pultruded composite bars

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 simulations were carried out in Simulia Abaqus, and Python scripting was possible generate models obtain for material. numerical model built based experimental results has very good agreement (force–displacement delamination length–time characteristics) which allows use mentioned analysis more complex structures. Acoustic emission introduced as an auxiliary technique. obtained from both experiment complies registered acoustic events. method can be preparing material other composite materials, display effect.