The second part of the experiment was called pre-compression test, which was focused on CPE of this kind of smart material in a structure.
第二部分实验称为预压实验，研究样品在受压条件下的驱动性能。
The effect by pre-plug compression rate on formation of the cavity was investigated in a comparative method with step-down test samples of HCC billet and rolled bloom respectively.
用塔形试样对比研究了水平连铸管坯和轧制管坯穿孔时顶头前压缩率对孔腔形成的影响。
The test results show that: the hard brittle marble obviously performs time-lagged destruction under long time of pre-peak stress uniaxial compression.
试验结果表明：在应力峰值前的长时间单轴压缩作用下，硬脆性大理岩的破坏表现出明显的时滞性；
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