We present deformation localization and cracking process of sandstone with two flaws of different geometric configurations in uniaxial compression. The full field strain and progressive cracking processes are quantitatively monitored using three‐dimensional digital image correlation and acoustic emission techniques. The results show that peak strength and elastic modulus show a first decrease and then increase trend with regard to ligament angle under the same flaw geometry, achieving the minimum at the ligament angle 60°. The tensile strain develops at low stress level and then increases significantly. However, the shear strain only tends to be obvious while approaching peak stress. With the ligament angle increasing, the crack coalescence mode transfers from indirect to direct coalescence. In addition, the complete cracking processes of sandstone can be divided into six stages, together with six crack coalescence modes.

中文翻译：

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包含两个不同几何排列缺陷的砂岩变形局部化和开裂过程

我们提出了在单轴压缩中具有不同几何构型的两个缺陷的砂岩变形局部化和开裂过程。使用三维数字图像关联和声发射技术对全场应变和渐进破裂过程进行定量监控。结果表明，在相同缺陷几何条件下，韧度角的峰值强度和弹性模量呈现先降低后升高的趋势，在韧度角为60°时达到最小值。拉伸应变在低应力水平下发展，然后显着增加。但是，在接近峰值应力时，剪切应变只会趋于明显。随着韧带角度的增加，裂纹的聚结模式从间接聚结转变为直接聚结。此外，