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
- Acta Optica Sinica
- Vol. 40, Issue 11, 1112001 (2020)
Fig. 1. Reference and deformed images. (a) Reference image; (b) deformed image
Fig. 2. RMSE of displacement field U versus element/subset size at crack front region
Fig. 3. RMSE of strain field Ux versus element/subset size at crack front region
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
Fig. 5. Relationship between RMSE of strain field Ux and Gaussian noise at crack front region by three methods
Fig. 6. Relationship between RMSE of displacement field U and element/subset size for measurement on one side of crack face
Fig. 7. Relationship between RMSE of strain field Ux and element/subset size for measurement on one side of crack face
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
Fig. 9. Reference and deformed images. (a) Reference image; (b) deformed image
Fig. 10. Comparison between strains Ux by three methods with optimum element/subset size at a straight line at crack front
Fig. 11. Comparison between strains field Ux by three methods with optimum element/subset size at a straight line on one side of crack face
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Table 1. Element/subset sizes used by three methods for the measurement of deformation at crack front region
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Table 2. Element/subset sizes used by three methods for the measurement of deformation on one side of crack face
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