An Experimental Study of the Tensile Characteristics for Glass Fiber Reinforced Composites at High Strain Rate
玻纤增强复合材料高应变率拉伸实验研究

Using explosion expanding ring testing technology, experimental study of mechanical properties of glass fiber reinforced composites (GFRC) at high strain rate (104 s-1) was carried out. In experiment energy loading of driving ring was achieved based on charge detonated by gasifying copper wire. Particle velocity of freely expanding ring was measured by VISAR, then one-dimensional tensile failure of GFRC at strain rate of 104 s-1 was achieved, and the velocity-time curve of this material was obtained. The stress-strain relation of GFRC was calculated. Finally, the quasi-static experimental data measured at lower, medium and higher stain rate were compared with above-mentioned dada. Results show that the effect of tensile strain ratio of GFRC is obvious, the maximam intensity in high strain rate is increased 70% compared with that in quasi-static state.