岩土工程学报2013，Vol.35Issue(7)：1362-1368,7.
数字图像相关法测定岩石Ⅰ-Ⅱ复合型裂纹应力强度因子
Evaluation of mixed-mode Ⅰ-Ⅱ stress intensity factors of rock utilizing digital image correlation method
摘要
Abstract
A method for determining the mixed-mode Ⅰ-Ⅱ stress intensity factors and crack tip position of rock specimens by the digital image correlation method is proposed.The notched semicircular disk rock specimen under three-point bending is used in the rock fracture tests,the displacement field around the crock tip is measured by the digital image correlation method,and nonlinear displacement field equations with unknown parameters are solved by the nonlinear method.The characters of rock specimen fracture and crack propagation are studied based on the analysis of stress intensity factors and crack extension length.The experimental results show that the mixed-mode Ⅰ-Ⅱ stress intensity factors and crack tip position of rock can be evaluated accurately from the displacement components by the proposed method.关键词
数字图像相关方法/Ⅰ-Ⅱ复合型裂纹应力强度因子/裂纹扩展长度/岩石断裂Key words
digital image correlation method/ mixed-mode Ⅰ-Ⅱ stress intensity factors/ crack extension length/ rock fracture分类
建筑与水利引用本文复制引用
代树红,马胜利,潘一山..数字图像相关法测定岩石Ⅰ-Ⅱ复合型裂纹应力强度因子[J].岩土工程学报,2013,35(7):1362-1368,7.基金项目
国家自然科学基金项目(41002075) （41002075）
地震动力学国家重点实验室项目(LED2008B08) （LED2008B08）
清华大学水沙科学与水利水电工程国家重点实验室项目(sklhse-2012-c-03) （sklhse-2012-c-03）
