摘要
利用轻气炮加载技术和VISAR(激光速度干涉仪)光测技术,在500 m/s的冲击加载速度下,对3种不同厚度的HR-2抗氢钢样品进行了层裂实验,得到样品自由面速度剖面曲线。根据所得曲线波形计算出相应条件下的层裂强度、层裂片厚度以及各自的应变率,最后得到层裂强度随拉伸应变率变化的关系曲线。通过实验与分析可知,在相同冲击压力下,层裂强度随拉伸应变率的增长而增长,随样品厚度的增加而减小。
Using light-gas gun loading and VISAR （Laser velocity Intervene instrument ） technology, three HR-2 steel sampies with different thickness were struck at 500 m/s velocity by a flyer. The free-surface velocity curves of the sample were obmined. Aeeording to the curve, the spall strength, the thickness of spall scab and the tensile strain rate under different condition were obtained. Last, the spall strength vs tensile strain rate was plotted. By the experiment and analysis, at the same shock pressure, the spall strength will increase with the strain rate, and it will decrease with the inereasing thickness of samples.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2007年第2期72-75,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(10476027)
湖北省科技攻关项目(2004AA101C23)
