Jun Gu. Strain Field Calculation by 3D Digital Image Correlation Method Based on Subset Projection and Savitzky-Golay Filter[J]. Laser & Optoelectronics Progress, 2021, 58(12): 1212004
- Laser & Optoelectronics Progress
- Vol. 58, Issue 12, 1212004 (2021)
Fig. 1. Principle diagram of two-dimensional DIC
Fig. 2. Flow chart of DIC calculation. (a) 2D; (b) 3D
Fig. 3. Schematic of tangential plane projection method
Fig. 4. Schematic of displacement field in strain calculation subset. (a) u; (b) v
Fig. 5. Simulated morphology with homogeneous deformation (no noise)
Fig. 6. Simulated strain fields with homogeneous deformation and error (M=5 and no noise). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 7. Simulated morphology with inhomogeneous deformation (no noise)
Fig. 8. Simulated strain fields with inhomogeneous deformation and error (M=5 and no noise). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 9. Simulated strain fields with homogeneous deformation and error (M=5,σx,y=0.001 mm,σz=0.004 mm). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 10. Simulated strain fields with homogeneous deformation and error (M=10,σx,y=0.001 mm,σz=0.004 mm). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 11. Simulated strain fields with inhomogeneous deformation and error (M=5,σx,y=0.001 mm,σz=0.004 mm). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 12. Simulated strain fields with inhomogeneous deformation and error (M=10,σx,y=0.001 mm,σz=0.004 mm). (a) Positive strain along x direction; (b) positive strain along y direction; (c) tangential strain; (d) strain field error along x direction
Fig. 13. Schematic of experimental system
Fig. 14. Strain field distributions of thin plate. (a) εxx; (b) εyy;(c)γxy
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Table 1. Statistics of strain field errors along x direction
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Table 2. Main calibration parameters
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