جستجوی مقالات مرتبط با کلیدواژه « enf specimen » در نشریات گروه « مکانیک »

In this paper, the effect of stacking sequence on strain energy release rate (SERR) distribution is numerically investigated in the laminated end notch flexure (ENF) specimens. ENF specimens are three-dimensionally modeled in finite element software ABAQUS, and strain energy release rate is calculated by virtual crack closure technique (VCCT). Numericalresults for different lay-ups showed that the available non-uniformity ratio in the literature only depends on bending moduli and does not consider the effects of other moduli. Therefore, a new parameter which is dependent on both flexural and extensional moduli is proposed for symmetric ENF specimens. Finally, a method for estimation of critical SERR in multidirectional ENF specimens is introduced based on the equivalent layup approach. In fact, each multidirectional laminate is simplified by an equivalent unidirectional laminate so that both layups have the same flexural rigidities.