不同饱和度时砂岩材料循环载荷特性曲线实验

Research on Characteristic Curves of Sandstone under Cycle Load and Different Saturation Degree

通过对在自然、烘干、半饱和及饱和4种状态下的砂岩材料进行循环加、卸载试验,对比试验原始图形和拟合参数曲线得出砂岩为非弹性材料;随着饱和度的增加,材料的变形增大、屈服强度和抗压强度降低;受饱和度的影响,表征砂岩变形特性的各拟合参数各异。

Compared with the original figure and fitting parameter, experiments of the deformation characteristics of sandstone under four different states of naturally drying, stoving, half-saturation and saturation were carried out, the experimental results showed that the sandstone is an inelastic material, the distortion of this material increases and the yield strength and the compressive strength of the material reduce with the increase of saturation degree, and each fitting parameter expressing the distortion characteristic of sandstone is different from each other due to the influence of saturation degree.