Centrosymmetric 3D Deformation Measurement using Grid Method with a Single-Camera
- 319 Downloads
This study proposes an effective method to measure centrosymmetric 3D static and dynamic deformations from the microscale to macroscale using grid method with a single camera. The camera was tilted at a particular angle and used to observe specimen grids in order to acquire coupling fields of both in-plane and out-of-plane displacement. This study also analyzes the decoupling methods of these two displacement types, and a systematic deduction of a theoretical equation for 3D deformation analysis was conducted based on the method. The sensitivity of morphology measurement was then evaluated and the elimination of noise and rotational errors was discussed. The efficiency and accuracy of this technique was verified through a microscale static feasibility test and a high-speed impact experiment that simulated an underwater explosion. The proposed approach uses minimal equipment, is simple and convenient, and can be used to measure centrosymmetric 3D deformation in multi-scale both statically and dynamically. In addition, this method avoids the non-synchronization problem of a pair of high-speed cameras in high-speed 3D measurements.
KeywordsCentrosymmetric deformation Grid method 3D deformation Micro morphology Underwater explosion
The authors are grateful to the financial support from the National Natural Science Foundation of China (11232008, 11572041 and 11372037),the Program for New Century Excellent Talents in University (NCET-12-0036) and the Opening fund of State Key Laboratory of Nonlinear Mechanics.
- 8.Arai Y, Kanameishi S, Yokozeki S (2010) Three-dimensional microstructure measurement by high-resolution fringe analysis for shadow moiré image by SEM. Proc. SPIE 7790, Interferometry XV: Techniques and Analysis: 77900EGoogle Scholar
- 15.Beberniss T, Spottswood M, Eason T (2011) High-speed digital image correlation measurements of random nonlinear dynamic response. Exp Appl Mech 6:171–186Google Scholar
- 17.Allaeys F, Luyckx G, Sarrazin C, Van Paepegem W, Jovanov L, Philips W (2014) A 3D shape measurement technique that makes use of a printed line pattern. Exp Mech 54(6):999–1009Google Scholar
- 20.Berke RB, Sebastian CM, Chona R, Patterson EA, Lambros J (2016) High Temperature Vibratory Response of Hastelloy-X: Stereo-DIC Measurements and Image Decomposition Analysis. Exp Mech 56(2):231–243Google Scholar
- 28.Cao YY, Wang C, Ma QW, Ma SP (2015) Experimental investigation of the startup time difference between high-speed cameras. Chin Opt Lett 13(7):40–44Google Scholar
- 33.BIPM, IEC, IFCC, ILAC, IUPAC, IUPAP, ISO, OIML (2008) Evaluation of measurement data—guide for the expression of uncertainty in measurement. JCGM 100:2008Google Scholar
- 37.Xiang DL, Rong JL, He X (2015) Experimental investigation of dynamic response and deformation of aluminum honeycomb sandwich panels subjected to underwater impulsive loads. Shock Vib 2015:1–13Google Scholar