Digital-image correlation (DIC) is a deformation-measurement technique used to determine rock and soil mechanics. We review DIC tests of rock and soil, with data categorized according to specimen shape, test type, and DIC method. A new three-dimensional-DIC system integrates a transparent triaxial-compression servo-control test system for rocks. The confining pressure cell is transparent and three groups of image-acquisition units, which can be controlled with loading cell at the same time, are adopted to obtain the maximum observed fields. The average magnification factors caused by the transparent cell and oil are 1.4430 and 1.0331 for the measured horizontal and vertical distances, respectively. A triaxial compressive test of rock is performed and the specimen’s surface-strain fields and crack propagation are discussed.

数字图像相关 (DIC) 是一种用于确定岩石和土壤力学的变形测量​​技术。我们回顾了岩石和土壤的 DIC 测试，数据根据试样形状、测试类型和 DIC 方法分类。一种新的三维DIC系统集成了岩石的透明三轴压缩伺服控制测试系统。围压盒是透明的，采用三组图像采集单元，可与测压元件同时控制，以获得最大观察场。对于测量的水平和垂直距离，由透明细胞和油引起的平均放大系数分别为 1.4430 和 1.0331。进行了岩石的三轴压缩试验，并讨论了试样的表面应变场和裂纹扩展。