玻纤增强复合材料高应变率拉伸实验研究

利用爆炸膨胀环实验技术,对玻璃纤维增强复合材料(GFRC)进行了高应变率(104s-1)下力学性能研究。实验中使用铜丝汽化引爆装药的方法对驱动环进行能量加载,并采用激光速度干涉仪(VISAR)测量试样环自由膨胀的质点速度,实现了玻璃纤维增强复合材料在104应变率下的一维拉伸破坏,并获取了该材料的速度时间曲线。经过计算得到了材料的应力应变关系,最后与该材料在准静态下、中高应变率下实验得到的数据进行了比较。

An Experimental Study of the Tensile Characteristics for Glass Fiber Reinforced Composites at High Strain Rate

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.