摘要
The dynamic response of vitreous carbon to uniaxial strain loading has been investigated by means of the plate impact experiments. The two x cut shorted quartz gauges assembled with impactor and target were used to obtain the wave speeds in material and the stress histories at the sample gauge interface. The wave speed and stress histories were analyzed to determine the peak state in the sample. For compressive stress up to 4 0 GPa, the wave profiles were observed to be simple and steady, the uniaxial strain response is essentially nonlinear elastic, and no inelastic deformation has been found. All the experiment results indicate that the Hugoniot curve of vitreous carbon is concave downward just like that of fused silicon. There is no shock wave but the compressed wave propagating in the impacted samples.
研究了非晶态碳材料板碰撞下的一维应变动态响应 .利用在碰撞材料样品和非晶态碳样品上的石英压力传感器测量了样品中的应力历史和冲击波速度 .对试验测得的速度及应力历史进行了分析处理 .在 4 0GPa的冲击条件下 ,非晶态碳材料的冲击响应波形是简单稳定的 ,其一维应变条件下为非线性弹性响应 ,在试验冲击应力范围内没有发现非弹性变形 .试验数据显示材料的Hugoniot曲线是上凸的 ,与熔硅材料相似 .
