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Null strain analysis of submerged aneurysm analogues using a novel 3D stereomicroscopy device

Author

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  • Brooks A. Lane
  • Susan M. Lessner
  • Narendra R. Vyavahare
  • Michael A. Sutton
  • John F. Eberth

Abstract

To measure the inhomogeneous 3D-strain fields present during inflation-extension testing of physiologically submerged micro-aneurysms, a Stereo Digital Image Correlation (StereoDIC) microscopy system is developed that revolves 15° stereo-angle cameras around a centrally-mounted target. Calibration is performed using submerged dot patterns and system accuracy verified using strain and deformation analyses for rigid body motions of speckle-patterned, micro-aneurysmal surrogates. In terms of the Green-Lagrange strain tensor and the 3D displacement fields, the results are stable even after 120 minutes, with maxima in both strain bias and strain standard deviation less than 2E-03 for all components, and micron-level displacement standard deviation.

Suggested Citation

  • Brooks A. Lane & Susan M. Lessner & Narendra R. Vyavahare & Michael A. Sutton & John F. Eberth, 2020. "Null strain analysis of submerged aneurysm analogues using a novel 3D stereomicroscopy device," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 23(8), pages 332-344, June.
    • Handle: RePEc:taf:gcmbxx:v:23:y:2020:i:8:p:332-344
    DOI: 10.1080/10255842.2020.1724974
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