本文进行了混凝土分别在单、双向侧压作用下受拉变幅疲劳试验，得到了疲劳寿命和残余应变。
Variable-amplitude fatigue tests for concrete in tension under single and bi-lateral pressures are conducted. Consequently, the fatigue life and residual strain are obtained.
不同岩性岩石的应变软化性态和破坏机制也均随侧压的增大而发生转化。
Behavior of the strain softening and failure mechanism on different rocks transforms with the increase of confining pressure.
结果表明：川北方程能较好地模拟花生、大豆、芝麻、亚麻籽的侧限排油压榨的应力、应变关系。
The results of simulation demonstrated that the model by Kawakita's Equation can simulate the stress-strain well.
方法：在后牙单种植体支持式义齿上部结构不同载荷点分别施加载荷，以电阻应变法对种植体颊舌两侧组织进行了应变分析。
Methods: Strains of the tissue around the implant were tested and effects of nine load locations were analyzed by resistant strain method.
研究表明，水泥土电阻率随龄期和无侧限抗压强度的增大而增大，随着应变的增加而逐渐降低；
The electrical resistivity of cemented soil increased with the increment of age and unconfined compression strength, whereas decreased with the increment of strain.
包括击实试验、无侧限强度试验、动应变和动强度试验等。
The tests include compaction test, unconfined compression test, dynamic strength and dynamic strain test and so on.
试验中采用两种加载方式：一种为不同应变速率下的双向比例加载，另一种为保持一向恒定侧压下的动态压缩试验。
Two cases of loading types were adopted: one was biaxial proportional dynamic loading and the other was axial dynamic loading with one-side constant confining pressure.
该强度模型表明介质破坏是一个过程，反映了强度突变的应变率阈值效应与侧限压力下主破裂面上矿物颗粒团局部二次破坏的力学机制。
The model indicates that the failure of rock is a process in which there is a coupling between crack development and the slipping of cracked plane. The strain…
高精度数控马达在大范围内改变侧试频率和应变。
A digitally precisely controlled motor can vary test frequency and strain over a wide range.
高精度数控马达在大范围内改变侧试频率和应变。
A digitally precisely controlled motor can vary test frequency and strain over a wide range.
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