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用光弹贴片法、声发射技术和电视录象的方法,研究了山东济南辉长岩试件(15×45×90mm~3)。在平面应力状态下,单轴压缩加载的过程中,岩石表面(45×90mm~2)的应变场的等差线(即最大剪切应变的等值线)条纹图案的连续变化过程。 在加载到峰值载荷的88％—95％时,高级次的等差线条纹在包含即将发生的断层面的区带中高度集中。变形集中区的主应变差(最大剪切应变)的值比周围介质可高出5—6倍。 变形局部化的趋势比声发射率剧增要早得多。
The experiment of gabbro in Jinan, Shandong Province (15 × 45 × 90mm ~ 3) was studied by using photoelastic method, acoustic emission technique and video recording method. In the plane stress state, the uniaxial compression loading of the rock surface (45 × 90mm ~ 2) strain field equidistant line (ie, the maximum shear strain contour line) continuous changes in the pattern of stripes. When loaded to 88% -95% of the peak load, the higher-order aliens stripes are highly concentrated in the zone containing the impending fault plane. The main strain difference (maximum shear strain) in the deformation zone can be 5-6 times higher than the surrounding medium. The trend of deformation localization is much earlier than the sharp increase of acoustic emissivity.