岩土力学2011，Vol.32Issue(10)：3196-3200,5.
基于数字散斑相关方法的虚拟引伸计及其在岩石裂纹动态观测中的应用
Virtual extensometer based on digital speckle correlation method and its application to deformation field evolution of rock specimen
摘要
Abstract
The virtual extensometer is developed based on digital speckle correlation method (DSCM). To realize the virtual extensometer, the cracks on the specimen are firstly identified and located using the strain fields measured by DSCM. Then, virtual extensometers are installed on the cracks. Finally, the opening and the dislocation of the cracks are calculated through the displacement fields. The principle and realization of the virtual extensometer are introduced. The reliability of virtual extensometer is verified by a specially designed experiment and the resolution of virtual extensometer is calibrated as 0.1 pixels. This virtual extensometer is applied to an experiment to study the failure procedure of a granite specimen containing non-penetrating crack (three-dimensional crack). The type and sequence-by-time of cracks on the specimen are determined based on the measurement results from the virtual extensometer. The failure mechanism of the specimen is then analyzed.关键词
虚拟引伸计/数字散斑相关方法(DSCM)/裂纹/岩石破坏Key words
virtual extensometer/ digital speckle correlation method (DSCM)/ crack/ rock failure分类
建筑与水利引用本文复制引用
郭文婧,马少鹏,康永军,马沁巍..基于数字散斑相关方法的虚拟引伸计及其在岩石裂纹动态观测中的应用[J].岩土力学,2011,32(10):3196-3200,5.基金项目
国家自然科学基金项目资助(No.10972038) （No.10972038）
地震动力学国家重点实验室开放基金项目资助(No.LED08-12). （No.LED08-12）
