Pin hole tensile and fatigue properties of self-reinforced PET composites

摘要

This study investigates the effects of the width-to-hole diameter ratio (W/D) and the edge distance-to-hole diameter ratio (E/D) of a specimen on the bearing properties of self-reinforced recycled poly (ethylene terephthalate) (srrPET) composites with (srrPET-FR) and without flame retardant under a tensile and tensile -tensile fatigue load. The bearing strength of srrPET composites is largely dependent on the W/D ratios, whereas E/D ratios did not show any significant influence. The srrPET composites exhibited higher fatigue cycles compared with the srrPET-FR composites at the same (stress amplitude) Ga. Higher W/D ratios resulted in a higher fatigue strength for srrPETs. The compact constitutive equation used to predict the curves between Ga and number of cycles to failure (Nf), well agree with the experimental results.