Browse > Article
http://dx.doi.org/10.12989/sem.2019.69.4.467

Tensile and fracture characterization using a simplified digital image correlation test set-up  

Kumar, Abhishek (CSIR - Structural Engineering Research Centre)
Vishnuvardhan, S. (CSIR - Structural Engineering Research Centre)
Murthy, A. Ramachandra (CSIR - Structural Engineering Research Centre)
Raghava, G. (CSIR - Structural Engineering Research Centre)
Publication Information
Structural Engineering and Mechanics / v.69, no.4, 2019 , pp. 467-477 More about this Journal
Abstract
Digital image correlation (DIC) is now a popular and extensively used full-field metrology technique. In general, DIC is performed by using a turnkey solution offered by various manufacturers of DIC. In this paper, a simple and economical set-up for DIC is proposed which uses easily accessible digital single-lens reflex (DSLR) camera rather than industrial couple-charged device (CCD) cameras. The paper gives a description of aspects of carrying a DIC experiment which includes experimental set-up, specimen preparation, image acquisition and analysis. The details provided here will be helpful to carry DIC experiments without specialized DIC testing rig. To validate the responses obtained from proposed DIC set-up, tension and fatigue tests on specimens made of IS 2062 Gr. E300 steel are determined. Tensile parameters for a flat specimen and stress intensity factor for an eccentrically-loaded single edge notch tension specimen are evaluated from results of DIC experiment. Results obtained from proposed DIC experiments are compared with those obtained from conventional methods and are found to be in close agreement. It is also noted that the high resolution of DSLR allows the use of proposed approach for fracture characterization which could not be carried out with a typical turnkey DIC solution employing a camera of 2MP resolution.
Keywords
digital image correlation; DSLR; fracture characterization; SIF; tensile properties;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Shang, S., Yun, G.J., Kunchum, S. and Carletta, J. (2013), "Identification of isotropic and orthotropic constitutive parameters by FEA-free energy-based inverse characterization method", Struct. Eng. Mech., 45(4), 471-494.   DOI
2 Hild, F., Amine, B., Ludovic, C., Hugo, L., Florent, M., Jan, N., Florent, P., Zvonimir, T. and Stephane, R. (2016), "Toward 4D mechanical correlation", Adv. Model. Simulat. Eng. Sci., 3(1), 17.
3 Jhung, M.J. and Park, Y.W. (1999), "Deterministic structural and fracture mechanics analyses of reactor pressure vessel for pressurized thermal shock", Struct. Eng. Mech., 8(1), 103-118.   DOI
4 Tippur, H. and Periasamy, C. (2013), A Digital Gradient Sensor for Nondestructive Evaluation and Stress Analysis, SPIE Newsroom, March.
5 Westerweel, J., Elsinga, G.E. and Adrian, R.J. (2013), "Particle image velocimetry for complex and turbulent flows", Ann. Rev. Flu. Mech., 45(1), 409-436.   DOI
6 ASTM E1820-18 Standard Test Method for Measurement of Fracture Toughness (2018), ASTM International, West Conshohocken, Pennsylvania, U.S.A.
7 ASTM E647-15e1 Standard Test Method for Measurement of Fatigue Crack Growth Rates (2015), ASTM International, West Conshohocken, Pennsylvania, U.S.A.
8 ASTM E8/E8M-16a Standard Test Methods for Tension Testing of Metallic Materials (2016), ASTM International, West Conshohocken, Pennsylvania, U.S.A.
9 Atluri, S.N. and Kobayashi, A.S. (1993), Mechanical Responses of Materials, Handbook of Experimental Mechanics, 1-37.
10 Ayatollahi, M.R. and Sedighiani, K. (2010), "Crack tip plastic zone under mode I, mode II and mixed mode (I+II) conditions", Struct. Eng. Mech., 36(5), 575-598.   DOI
11 Maire, E. and Withers, P.J. (2014), "Quantitative x-ray tomography", Int. Mater. Rev., 59(1), 1-43.   DOI
12 Yoneyama, S., Ogawa, T. and Kobayashi, Y. (2007), "Evaluating mixed-mode stress intensity factors from full-field displacement fields obtained by optical methods", Eng. Fract. Mech., 74(9), 1399-1412.   DOI
13 Julien, R. (2007), "From pictures to extended finite elements: Extended digital image correlation (X-DIC) corr'elation d' images num'eriques'etendue (CIN E)", Sci., 335, 1-8.
14 Lionello, G. and Luca, C. (2014), "A practical approach to optimizing the preparation of speckle patterns for digital-Image correlation", Measure. Sci. Technol., 25(10), 107001.
15 Lu, H., and Cary, P.D. (2000), "Deformation measurements by digital image correlation: Implementation of a second-order displacement gradient", Exper. Mech., 40(4), 393-400.   DOI
16 Luo, P.F., Chao, Y.J., Sutton, M.A. and Peters, W.H. (1993), "Accurate measurement of three-dimensional deformations in deformable and rigid bodies using computer vision", Exper. Mech., 33(2), 123-132.   DOI
17 Pan, B., Kemao, Q., Huimin, X. and Anand, A. (2009), "Two-dimensional digital image correlation for in-plane displacement and strain measurement: A review", Measure. Sci. Technol., 20(6), 062001.
18 Peters, W.H. and Ranson, W.F. (1982), "Digital imaging techniques in experimental stress analysis", Opt. Eng., 21(3), 427-431.
19 Rastogi, P.K. (2000), Photomechanics, Topics in Applied Physics, Springer Berlin Heidelberg, Berlin, Heidelberg, Germany.
20 Regez, B., Ying, Z., Tsuchin, C., Jarlen, D. and Ajay, M. (2008), "In-plane bulk material displacement and deformation measurements using digital image correlation of ultrasonic C-scan images", Struct. Eng. Mech., 29(1), 113-116.   DOI
21 Rethore, J., Stephane, R. and Francois, H. (2007), "From Pictures to Extended Finite Elements: Extended Digital Image Correlation (X-DIC)." Comptes Rendus - Mecanique 335(3), 131-137.   DOI
22 Roux, S. and Hild, F. (2008), "Digital image mechanical identification (DIMI)", Exper. Mech., 48(4), 495-508.   DOI
23 Dournaux, J.L., Bouvier, S., Aouafi, A. and Vacher, P. (2009), "Full-field measurement technique and its application to the analysis of materials behaviour under plane strain mode", Mater. Sci. Eng.: A, 500(1-2), 47-62.   DOI
24 Bay, B.K., Smith, T.S., Fyhrie, D.P. and Saad, M. (1999), "Digital volume correlation: Three-dimensional strain mapping using X-ray tomography", Exper. Mech., 39(3), 217-226.   DOI
25 Blaber, J., Adair, B. and Antoniou, A. (2015), "Ncorr: Open-source 2D digital image correlation matlab software", Exper. Mech., 55(6), 1105-1122.   DOI
26 Buljac, A., Jailin, C., Mendoza, A., Neggers, J., Taillandier-Thomas, T., Bouterf, A., Smaniotto, B., Hild, F. and Roux, S. (2018), "Digital volume Ccrrelation: Review of progress and challenges", Exper. Mech., 58(5), 661-708.   DOI
27 Grediac, M., Sur, F. and Blaysat, B. (2016), The Grid Method for In-Plane Displacement and Strain Measurement: A Review and Analysis, John Wiley & Sons, Ltd.
28 Harilal, R., Vyasarayani, C.P. and Ramji, M. (2015), "A linear least squares approach for evaluation of crack tip stress field parameters using DIC", Opt. Las. Eng., 75, 95-102.   DOI
29 Helm, J.D., Sutton, M.A. and McNeill, S.R. (1996), "Improved three-dimensional image correlation for surface displacement measurement", Soc. Photo-Opt. Instrument. Eng., 35(7), 1911-1920.