Browse > Article
http://dx.doi.org/10.5762/KAIS.2017.18.4.391

2D Image Numerical Correction Method for 2D Digital Image Correlation  

Kim, Wonseop (Mechanical Engineering, Graduate School, Kongju National University)
Hong, Seokmoo (Department of Metal-Mold Design Engineering, Kongju National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.4, 2017 , pp. 391-397 More about this Journal
Abstract
Recently, digital image correlation (DIC) techniques have been used to measure dynamic deformation during tensile testing. The standard tensile test method measures the average displacement of the relevant specimen to calculate the true stress-strain curve. Therefore, the validity of the true stress curve is restricted to the stress incurred within the uniform stretching interval, i.e., the maximum stress corresponds to the starting point of the necking deformation. Alternatively, if DIC is used, the effective range of the strain and strain rate can be extended to the breaking point of the tensile specimen, because of the feasibility of measuring the local strain over the entire area of interest. Because of these advantages, many optical 3D measurement systems have been introduced and used in research and industry. However, the conventional 3D measurement systems are exceedingly expensive and time consuming. In addition, these systems have the disadvantage of a very large equipment size which makes their transport difficult. In this study, a 2D image correction method employing a 2D DIC measurement method in conjunction with a numerical analysis method is developed using a smartphone. The results of the proposed modified 2D DIC method yielded higher accuracy than that obtained via the 3D measurement equipment. In conclusion, it was demonstrated that the proposed 2D DIC and calibration methods yield accurate measurement results with low time costs.
Keywords
DIC(Digital Image Correlation); Image correction; Tensile test; Least square method;
Citations & Related Records
연도 인용수 순위
  • Reference
1 B. Pan, D. Wu, Y. Xia, "High temperature deformation field measurement by combining transient aerodynamic heating simulation system and reliability-guided digital image correlation", Optics and Lasers in Engineering, vol. 48, pp. 841-848, 2010. DOI: https://doi.org/10.1016/j.optlaseng.2010.04.007   DOI
2 L. C. Shiau, S. Y Kuo, C. Y. Chen, "Thermal bulking behavior of composite laminated plates", Composite Structures, Vol 92, pp. 508-514, 2010. DOI: https://doi.org/10.1016/j.compstruct.2009.08.035   DOI
3 R. Brault, T. Djilali, M. Fazzini, S. Mistou, "Bi-axial fatigue analysis by stereo-correlation measurement", EPJ Web of Conference 6, 16005, 2010. DOI: https://doi.org/10.1051/epjconf/20100616005
4 R. Moslemian, C. Berggreen, L. A. Carlsson, R. Aviles, "Failure investigation of debonded sandwich columns - An experimental and numerical study", Journal of mechanics of materials and structures, Vol 4, no. 708, 2009. DOI: https://doi.org/10.2140/jomms.2009.4.1469
5 S. H. Tung, M. C. Weng, M. H. Shih, "Measuring the in situ deformation of retaining walls by the digital correlation method", Engineering Geology, vol. 166, pp. 116-126, 2013. DOI: https://doi.org/10.1016/j.enggeo.2013.09.008   DOI
6 j. Lim, S. Kim, H. Huh, S. Kwon, S. Park, "High Speed Tensile Tests of Steel Sheets for an Auto-body at the Intermediate Strain Rate", Journal of KSME, pp. 89-92, 2004.
7 K, Wang, J. E. Carsley, B. He, J. Li, L. Zhang, "Measuring forming limit strains with digital image correlation analysis", Journal of Materials Processing Technology, vol. 214, pp. 1120-1130, 2014. DOI: https://doi.org/10.1016/j.jmatprotec.2014.01.001   DOI
8 H. Hoffmann, S. Hong, "Tensile Test of very thin Sheet Metal and Determination of Flow Stress Considering the Scaling Effect", CIRP Annals - Manufacturing Technology, vol. 55, pp. 263-266, 2006.   DOI
9 B. Pan, D. Wu, Z. Wang, Y. Xia, "High-temperature digital image correlation method for full-field deformation measurement at $1200^{\circ}C$", Meas. Sci. Technol., vol. 22, pp. 11, 2011.
10 T. Jin, "A study on Measuring Thermal Deformation of Metallic and Composite Material Structures using Digital Image Correlation Technique", Konkuk University, 2014.
11 GOM ARAMIS User Manual, 2014.
12 CORELLATE VIC-3D Manual v7, 2015.