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Volume 34 Issue 3
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SHAO Long-tan, LIU Xiao, GUO Xiao-xia, HUANG Chuan, JU Peng, YANG Song, XUE Jie. Whole surface deformation measurement of triaxial soil specimen based on digital image processing[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(3): 409-415.
Citation: SHAO Long-tan, LIU Xiao, GUO Xiao-xia, HUANG Chuan, JU Peng, YANG Song, XUE Jie. Whole surface deformation measurement of triaxial soil specimen based on digital image processing[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(3): 409-415.
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Whole surface deformation measurement of triaxial soil specimen based on digital image processing

  • 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian116024, China; 2. Department of Computer Science, Wuhan Polytechnic University, Wuhan 430022, China; 3. Shan Dong C & G Engineering Construction Co., Ltd., Qingdao 266100, China; 4. Faculty of Electronic Information and Engineering, Dalian University of Technology, Dalian116024, China; 5. Department of Information Engineering, Dalian Ocean University, Dalian116023, China

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  • Received Date: March 11, 2011
  • Published Date: March 29, 2012
    Graphical Abstract
    • Abstract
  • An automatic digital image processing technique is presented for whole-surface measurement of specimens' deformations during triaxial tests. This method incorporates digital imaging techniques and computer-aided analysis to assess the deformation throughout a triaxial test. A detailed description of hardware as well as other equipment is provided. Regulated power supply along with a darkened chamber is adopted to ensure the stability of the lighting environment. Data analysis methodology including distortion correction, pixel equivalent normalization, strain field calculation and data splicing is provided. The calculation of strain is based on the assumption that in each neighborhood of time and space, specimen only deforms along radial. Finally, the advantage of this whole-surface deformation measurement in analyzing deformation localization for triaxial tests is discussed through results obtained from drained triaxial tests on saturated sand.
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    • References (15)
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