Failure behavior and damage mechanism of multiaxial glass fiber reinforced resin matrix composites

The experimental investigation on mechanical properties of the multi axial glass fiber reinforced epoxy vinyl ester resin (GF/EVE) and glass fiber reinforced unsaturated polyester (GF/UP) resin composite material were carried out.And the bending strength,interlaminar shear strength and modulus of the specimens were analyzed.The results show that,in the same layer design and process,the bending strength and impact toughness of GF/EVE resin are superior to GF/UP resin.0,90₆ specimen impact energy absorption performance is superior to the other five layer mode.And basing on SEM and micro ultrasonic C-scan imaging detection,the mechanism of the composites interface debonding mechanism and damage evolution behavior were elucidated.