Evaluation and analysis of interlaminar fracture toughness of bead filled matrix hybrid composite materials using orthotropic fracture mechanics

摘要

Evaluation of Mode I interlaminar fracture toughness for unidirectional hybrid composites fabricated with a bead filled epoxies was carried out. The two important fracture toughness parameters, G_(IC) and K_(IC) values of hybrid composites, were reviewed in accordance with the orthotropic fracture model. The deviation of measured G_(IC) and K_(IC) values from predicted values were explained based on the critical review of the basic assumption of orthotropic fracture model and characteristic material properties of hybrid composites. It can be said that, basically, the orthotropic fracture model can be used for evaluation of hybrid composite materials. However, careful analysis for G_(IC) and K_(IC) values which were derived from different source and some correction factor for K_(IC) values are necessary.