Measurement of three-dimensional displacement field in piled embankments using synchrotron X-ray tomography

Louis King, Abdelmalek Bouazza, Anton Maksimenko, Will P. Gates, Stephen Dubsky

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The measurement of displacement fields by nondestructive imaging techniques opens up the potential to study the pre-failure mechanisms of a wide range of geotechnical problems within physical models. With the advancement of imaging technologies, it has become possible to achieve high-resolution three-dimensional computed tomography volumes of relatively large samples, which may have previously resulted in excessively long scan times or significant imaging artefacts. Imaging of small-scale model piled embankments (142 mm diameter) comprising sand was undertaken using the imaging and medical beamline at the Australian Synchrotron. The monochromatic X-ray beam produced high-resolution reconstructed volumes with a fine texture due to the size and mineralogy of the sand grains as well as the phase contrast enhancement achieved by the monochromatic X-ray beam. The reconstructed volumes were well suited to the application of digital volume correlation, which utilizes cross-correlation techniques to estimate three-dimensional full-field displacement vectors. The output provides insight into the strain localizations that develop within piled embankments and an example of how advanced imaging techniques can be utilized to study the kinematics of physical models.

Original languageEnglish
Pages (from-to)885-892
Number of pages8
JournalCanadian Geotechnical Journal
Volume56
Issue number6
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Digital volume correlation
  • Model tests
  • Soil arching
  • Synchrotron tomography

Cite this

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abstract = "The measurement of displacement fields by nondestructive imaging techniques opens up the potential to study the pre-failure mechanisms of a wide range of geotechnical problems within physical models. With the advancement of imaging technologies, it has become possible to achieve high-resolution three-dimensional computed tomography volumes of relatively large samples, which may have previously resulted in excessively long scan times or significant imaging artefacts. Imaging of small-scale model piled embankments (142 mm diameter) comprising sand was undertaken using the imaging and medical beamline at the Australian Synchrotron. The monochromatic X-ray beam produced high-resolution reconstructed volumes with a fine texture due to the size and mineralogy of the sand grains as well as the phase contrast enhancement achieved by the monochromatic X-ray beam. The reconstructed volumes were well suited to the application of digital volume correlation, which utilizes cross-correlation techniques to estimate three-dimensional full-field displacement vectors. The output provides insight into the strain localizations that develop within piled embankments and an example of how advanced imaging techniques can be utilized to study the kinematics of physical models.",
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Measurement of three-dimensional displacement field in piled embankments using synchrotron X-ray tomography. / King, Louis; Bouazza, Abdelmalek; Maksimenko, Anton; Gates, Will P.; Dubsky, Stephen.

In: Canadian Geotechnical Journal, Vol. 56, No. 6, 01.01.2019, p. 885-892.

Research output: Contribution to journalArticleResearchpeer-review

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