Full-field deformation measurement of a large-rotation object using digital image correlation

2019 ◽  
Author(s):  
Lianpo Wang ◽  
Yonggang Gu ◽  
Chao Zhai
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Deformation Measurement ◽  
Image Correlation ◽  
Full Field ◽  
Large Rotation

scholarly journals Scheimpflug Camera-Based Stereo-Digital Image Correlation for Full-Field 3D Deformation Measurement

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Cong Sun ◽  
Haibo Liu ◽  
Yang Shang ◽  
Shengyi Chen ◽  
Qifeng Yu
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Rigid Motion ◽  
Deformation Measurement ◽  
Image Correlation ◽  
Depth Of Field ◽  
Full Field ◽  
Scheimpflug Camera ◽  
3D Deformation ◽  
Stereo Digital Image Correlation

To further extend the scope of stereo-digital image correlation (stereo-DIC) to more challenging environments, a novel Scheimpflug camera-based stereo-DIC is developed for full-field 3D deformation measurement, wherein the Scheimpflug condition, consisting of tilting the sensor plane with respect to the lens plane for the sake of larger depth of field (DOF) of the camera, is employed. The geometric imaging model of the Scheimpflug camera is described, on the basis of which a robust and effective stepwise calibration strategy is performed to calculate the intrinsic and extrinsic parameters of the stereo Scheimpflug rig. With the aid of a specially tailored stereo triangulation method and well-developed subset-based DIC algorithms, the three-dimensional shape and displacement of the specimen can be retrieved. Finally, practical experiments, including rigid motion tests and three-point bending tests, demonstrate the effectiveness and accuracy of the proposed approach.

scholarly journals Brief communication: Full-field deformation measurement for uniaxial compression of sea ice using the digital image correlation method

2019 ◽  
Vol 13 (5) ◽  
pp. 1487-1494 ◽  
Author(s):  
Anliang Wang ◽  
Zhijun Wei ◽  
Xiaodong Chen ◽  
Shunying Ji ◽  
Yu Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Digital Image Correlation ◽  
Sea Ice ◽  
Uniaxial Compression ◽  
Digital Image ◽  
Strain Field ◽  
Failure Modes ◽  
Deformation Measurement ◽  
Image Correlation ◽  
Full Field

Abstract. The study of the mechanical properties of sea ice benefits the parameterization of sea-ice numerical models and the optimization of engineering design. Deformation measurement of sea ice has been seen as the essential foundation for the study of these properties. However, this measurement has proved to be difficult due to the complex and nonhomogeneous mechanical properties of sea ice. In this paper, we took advantage of DIC (digital image correlation) to obtain the full-field displacement and strain of sea-ice specimens in a uniaxial compression experiment. Full-field deformations of sea ice under both vertical and horizontal loading were measured. Different mechanical behaviors such as microcracks and failure modes due to the anisotropic properties of sea ice were successfully captured. The nonuniformity and local concentration of the strain field were observed and analyzed. Additionally, we evaluated the displacement and strain field of the specimens to verify the feasibility and accuracy of the method. This successful application provides a convenient and powerful option for the study of sea-ice mechanical properties including failure modes, nonlinear behavior and crack propagation.

Deformation Measurement by Two-Dimensional Multi-Camera Full-Field Digital Image Correlation

2016 ◽  
Vol 36 (12) ◽  
pp. 1212002
Author(s):  
刘聪 Liu Cong ◽  
戴云彤 Dai Yuntong ◽  
戴美玲 Dai Meiling ◽  
刘晓鹏 Liu Xiaopeng ◽  
朱程鹏 Zhu Chengpeng ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Deformation Measurement ◽  
Image Correlation ◽  
Two Dimensional ◽  
Full Field
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