Application of Digital Image Correlation in Uniaxial Tensile Test

Yıl 2016, Cilt: 1 Sayı: 1, 33 - 38, 02.01.2016

Murat Aydın , Xin Wu Kerim Çetinkaya , İbrahim Kadı , Mustafa Yaşar

Öz

Application fields of non-contact measurement techniques have been recently increasing by means of optics and technological development in measurement applications. Digital image correlation (DIC) is the one and powerful non-contact measurement method that can be used to obtain elongation and strain as well. It is versatile and flexible measurement method can be adopted to many traditional test experiments such as tensile, compression, and bending in order to calculate mechanical properties of materials. In this study, DP600, DP800 and DP980 steel materials were performed to uniaxial tensile test and DIC technique was used to determine local strains in terms of comparison in different regions at the fracture area. While performing experiments, commercial DSLR camera was installed to capture videos under the white led lighting which is needed to decrease visual blurring and keep contrast as constant. Recorded videos were analyzed with VIC-2D software in an effort to calculate strain data. As a result, it was showed that the strains at the fracture area that were measured with DIC were higher than those measured which out of the fractured area and concluded that DIC method was appropriate and efficient technique to measure local strains in traditional uniaxial tensile test.

Kaynakça

• . Doyle F. J., The historical development of analytical photogrammetry, Photogrammetric Engineering, 1964, 259–265.
• . Gruner H., Hugershoff R., Photogrammetric Engineering, Vol. 37, No. 9, 1971, 939–947.
• . Sutton M.A., Orteu J.J., Schreier H.W., Image Correlation for Shape, Motion and Deformation Measurements, Springer, 2009, 1-2.
• . Hobrough A.G.L., The Photogrammetric Record, Vol. 18, No. 104, 2003, 337–340.
• . Yoneyama S., Ogawa T., Kobayashi Y., Evaluating mixed-mode stress intensity factors from full-field displacement fields obtained by optical methods, Engineering Fracture Mechanics, Vol. 74, No. 9, 2007, 1399–1412.
• . Peters W.H., Ranson W.F., Digital imaging techniques in experimental stress analysis, Optical Engineering, Vol. 21, No. 3, 1982, 427–431.
• . Sutton M.A., Wolters W.J., Peters W.H., Ranson W.F., and McNeill S.R., Determination of displacements using an improved digital correlation method. Image and Vision Computing, Vol. 1, No. 3, 1983, 133–139.
• . McCormick N., Lord J., Digital Image Correlation, Materials Today, Vol. 13, No. 12, 2010, 52-54.
• . Zhu F., Bai P., Zhang J., Lei D., and He X., Measurement of true stress-strain curves and evolution of plastic zone of low carbon steel under uniaxial tension using digital image correlation, Optics and Lasers in Engineering, Vol. 65, 2015, 81-88.
• . Dong Y., Kakisawa H., and Kagawa Y., Development of micro scale pattern for digital image correlation up to1400 oC, Optics and Lasers in Engineering, Vol. 68, 2015, 7-15.
• . SSAB Swedish Steel, 07-10-11,
• . Sreenivasan S., Xia M., Lawson S., and Zhou Y., Effect of laser welding on formability of DP980 steel, Journal of Engineering Materials and Technology, Vol. 130, 2008, 1-9.