光学学报, 2020, 40 (11): 1112001, 网络出版: 2020-06-10
一种针对裂尖变形场测量的正则化全局DIC方法 
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Regularized Global Digital Image Correlation Method for Crack Tip Deformation Field Measurement
图 & 表
图 1. 参考和变形图像。(a)参考图像;(b)变形图像
Fig. 1. Reference and deformed images. (a) Reference image; (b) deformed image
图 2. 裂纹前端区域位移场U的RMSE随单元/子区大小的关系
Fig. 2. RMSE of displacement field U versus element/subset size at crack front region
图 3. 裂纹前端区域应变场Ux 的RMSE随单元/子区大小的关系
Fig. 3. RMSE of strain field Ux versus element/subset size at crack front region
图 4. 不同方法下裂纹前端直线处应变场Ux最优解和理论解曲线对比
Fig. 4. Comparison between the theoretical curve and optimum curves by different methods of strain Ux with optimum element/subset size at a straight line at crack front region
图 5. 三种方法裂纹前端区域的应变场Ux的RMSE与噪声水平的关系
Fig. 5. Relationship between RMSE of strain field Ux and Gaussian noise at crack front region by three methods
图 6. 裂纹面一侧位移场U的RMSE与单元/子区大小关系
Fig. 6. Relationship between RMSE of displacement field U and element/subset size for measurement on one side of crack face
图 7. 裂纹面一侧应变场Ux的RMSE与单元/子区大小关系
Fig. 7. Relationship between RMSE of strain field Ux and element/subset size for measurement on one side of crack face
图 8. 不同方法下裂纹面右侧直线处应变场Ux最优解和理论解曲线对比
Fig. 8. Comparison between the theoretical curve and simulated curves by HRGDIC, HGDIC, 1-local, 2-local of strain field Ux with optimum element/subset size at a straight line on one side of crack face
图 9. 参考和变形图像。(a)参考图像;(b)变形图像
Fig. 9. Reference and deformed images. (a) Reference image; (b) deformed image
图 10. 裂纹前端直线处三种方法的应变场Ux曲线的对比
Fig. 10. Comparison between strains Ux by three methods with optimum element/subset size at a straight line at crack front
表 1所用三种方法测量裂纹前端区域所采用的单元/子区大小
Table1. Element/subset sizes used by three methods for the measurement of deformation at crack front region
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表 2所用三种方法测量裂纹面一侧区域所采用的单元/子区大小
Table2. Element/subset sizes used by three methods for the measurement of deformation on one side of crack face
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杜鉴昕, 赵加清, 王海涛, 孙立斌, 吴莘馨. 一种针对裂尖变形场测量的正则化全局DIC方法[J]. 光学学报, 2020, 40(11): 1112001. Jianxin Du, Jiaqing Zhao, Haitao Wang, Libin Sun, Xinxin Wu. Regularized Global Digital Image Correlation Method for Crack Tip Deformation Field Measurement[J]. Acta Optica Sinica, 2020, 40(11): 1112001.
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