摘要
为了从细观尺度研究含分叉裂纹花岗岩破裂过程,本文基于数字图像处理技术表征花岗岩真实细观结构,结合RFPA2D-DIP软件构建了含分叉裂纹花岗岩数值模型并进行单轴压缩试验,分析了含分叉裂纹花岗岩失稳破坏及裂纹演化规律。试验结果表明:含分叉裂纹花岗岩中,垂直于荷载施加方向的水平分叉裂纹滞后于其他分叉裂纹产生扩展裂纹;加载初始阶段分叉裂纹尖端应力集中,其初始裂纹在倾斜分叉裂纹尖端萌生,试件两端面与预制裂纹贯通导致试件破坏。
To study the fracture process of granite with split crack from mesoscale,the digital image processing was adopted to characterize the real meso structure of granite. A numerical mode of granite with split cracks was constructed and a uniaxial compression test was carried out by the RFPA2 D-DIP software. The instability failure and crack evolution of granite with split crack were analyzed as well. The experimental results show that the horizontal split crack perpendicular to the loaded direction moved slower than other split crack. In the initial loaded stage,the stress was concentrated at the top end of the split crack,and the initial crack began at the top end of the inclined split crack. The failure of the specimen was caused by the connection between its two surfaces and the prefabricated crack.
作者
席仕军
左宇军
孙文吉斌
邬忠虎
刘镐
税越
XI Shijun;ZUO Yujun;SUN Wenjibin;WU Zhonghu;LIU Hao;SHUI Yue(Mining College,Guizhou University,Guiyang 550025,China;College of Civil Engineering,Guizhou University,Guiyang 550025,China)
出处
《贵州大学学报（自然科学版）》
2019年第5期95-99,共5页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金项目资助(51574093,51774101)
贵州省高层次创新型人才培养项目资助(黔科合人才(2016)4011号)
贵州大学人才引进项目资助(贵大人基合字(2017)63号)
贵州大学培育项目资助(黔科合平台人才[2017]5788-49)
关键词
数字图像处理
真实细观结构
分叉裂纹
破裂过程
digital image processing
real mesoscopic structure
split crack
fracture process
