Author : Suraj W. Jagtap 1
Date of Publication :24th January 2018
Abstract: This paper presents a new optical method referred to as Digital Image Correlation (DIC). It permits full-field measurement of surface displacements. DIC works by comparing digital photographs of a component or test piece at different stages of deformation. By tracking blocks of pixels, the system can measure surface displacement and build up to full field 2D and 3D deformation vector fields and strain maps. Software techniques have been developed to obtain sub-pixel resolutions and allow efficient execution of the algorithms. Images can be obtained from a wide variety of sources including conventional charge-coupled device (CCD) image sensors or digital cameras. The DIC correlation process is not restricted to optical images and can also be applied to other datasets such as surface roughness maps and 2D surfaces of structures like tunnels. Theory of the method as well as its applications to strain measurements and nondestructive testing are presented further
- Sutton, M. A., Orteu, J. J., & Schreier, H. W.,Image Correlation for Shape, Motion and Deformation Measurements, Springer Science + Business Media, LLC 2009.
- Hung, P. C., & Voloshin, A. S., In-plane strain measurement by Digital Image Correlation, Photo Mechanics Laboratory Department of Mechanical Engineering.
- Simcak, F., Stamborska, M., & Hagara, M. (2011), Using of Digital Image Correlation for strain analysis in areas of stress concentration, Modelling of Mechanical and Mechatronic System.
- Lecomptea, D., Solb, H., Vantommea, J., & Habrakenc, A., Analysis of speckle patterns for deformation measurements by Digital Image Correlation.
- R, H., & M, R. (2014). Adaptation of Open Source 2D DIC Software Ncorr for solid mechanics application, 9th International Symposium on Advanced Science and Technology in Experimental Mechanics.
- McCormick, D., & Lord, D. (2010), Digital Image Correlation, National Physical Laboratory.
- Computing deformation measures from Digital Image Correlation data, Continuum Mechanics.
- Fayyada, T. M., & Leesb, J. M. (2014), Application of Digital Image Correlation to reinforced concrete fracture, Procedia Materials Science.
- Rimkus, A., Podviezko, A., & Gribniak, V. (2015), Processing digital images for crack localization in reinforced concrete members. Procedia Engineering.
- DIC- Ncorr - Example of Plate with a hole under loading, Retrieved from Full Field Displacement, http://www.ncorr.com /index.php/sem-s-dicchallenge