冲击载荷下K9玻璃的光学特性

发布时间：2018-03-25 17:37

本文选题：K玻璃　切入点：冲击载荷　出处：《高压物理学报》2017年05期

【摘要】：K9玻璃常作为冲击载荷下失效波(破坏波)萌生机制和脆性材料动态断裂特性的研究对象,而当作为冲击窗口材料时,由于冲击压力范围限制,其光学特性研究常被忽略。通过平板撞击实验,结合激光多普勒测速系统(DPS:Doppler Pin System,激光波长为1 550nm),获得了冲击波传播过程中不同光学测试界面运动的速度历史。通过分析原始干涉信号和界面速度剖面的时间对应关系,获得了K9玻璃保持冲击透明性及弹性响应的压力范围。研究结果表明,当冲击压力低于8GPa时,K9玻璃能保持良好的光学透明性,其动态折射率随密度的变化呈典型线性关系。
[Abstract]:K9 glass is often used as an object of study on the initiation mechanism of failure wave (failure wave) and dynamic fracture characteristics of brittle materials under impact loading. However, when K9 glass is used as an impact window material, it is limited by the range of impact pressure. The study of its optical properties is often neglected. Combined with the laser Doppler Pin system and the laser wavelength of 1 550 nm, the velocity history of different optical measurement interfaces in the process of shock wave propagation is obtained. The relationship between the original interference signal and the velocity profile of the interface is analyzed. The pressure range of impact transparency and elastic response of K9 glass is obtained. The results show that the optical transparency of K9 glass is good when the impact pressure is lower than 8GPa, and the dynamic refractive index of K9 glass has a typical linear relationship with the density.
【作者单位】：中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室;
【基金】：国家自然科学基金(10802080) 中国工程物理研究院科学技术发展基金(2015B0101006)
【分类号】：TQ171.112

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