首页> 外文期刊>Journal of Applied Mechanics and Technical Physics >EXPERIMENTAL ANALYSIS OF DYNAMIC MECHANICAL PROPERTIES FOR ARTIFICIALLY FROZEN CLAY BY THE SPLIT HOPKINSON PRESSURE BAR
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EXPERIMENTAL ANALYSIS OF DYNAMIC MECHANICAL PROPERTIES FOR ARTIFICIALLY FROZEN CLAY BY THE SPLIT HOPKINSON PRESSURE BAR

机译:霍普金森压力杆人工冻结黏土动态力学性能的实验分析。

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摘要

A device for impact compression experiments is the split Hopkinson pressure bar with a refrigerating attemperator. Data for incident and reflected waves are obtained by the measuring technique with strain gauges, and data for transmitted waves are obtained by the measuring technique with semiconductor gauges. Static compression tests of frozen clay are conducted at an identical temperature and different strain rates of 0.001 and 0.01 sec~(-1). Dynamic stress-strain curves are obtained at strain rates of 360-1470 sec~(-1). The low and high temperatures correspond to high and low strain rates, respectively. It is shown that both the temperature and strain rate affect the frozen soil deformation process. Different dynamic stress-strain curves obtained at the same temperature but different strain rates are found to converge. The test results indicate that frozen soil has both temperature-brittleness and impact-brittleness.
机译:用于冲击压缩实验的设备是带有制冷减温器的分体式Hopkinson压力杆。通过应变计的测量技术获得入射波和反射波的数据,通过半导体应变计的测量技术获得透射波的数据。在相同的温度和0.001和0.01 sec〜(-1)的不同应变速率下进行了冻结黏土的静态压缩试验。在360-1470 sec〜(-1)的应变速率下获得了动态应力-应变曲线。低温和高温分别对应于高应变率和低应变率。结果表明,温度和应变率均会影响冻土变形过程。发现在相同温度下获得的不同动态应力-应变曲线会收敛。试验结果表明,冻土既具有温度脆性又具有冲击脆性。

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