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Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation

Publication ,  Journal Article
Franck, C; Hong, S; Maskarinec, SA; Tirrell, DA; Ravichandran, G
Published in: Experimental Mechanics
June 1, 2007

A three-dimensional (3-D) full-field measurement technique was developed for measuring large deformations in optically transparent soft materials. The technique utilizes a digital volume correlation (DVC) algorithm to track motions of subvolumes within 3-D images obtained using fluorescence confocal microscopy. In order to extend the strain measurement capability to the large deformation regime (>5%), a stretch-correlation algorithm was developed and implemented into the Fast Fourier Transform (FFT)-based DVC algorithm. The stretch-correlation algorithm uses a logarithmic coordinate transformation to convert the stretch-correlation problem into a translational correlation problem under the assumption of small rotation and shear. Estimates of the measurement precision are provided by stationary and translation tests. The proposed measurement technique was used to measure large deformations in a transparent agarose gel sample embedded with fluorescent particles under uniaxial compression. The technique was also employed to measure non-uniform deformation fields near a hard spherical inclusion under far-field uniaxial compression. Introduction of the stretch-correlation algorithm greatly improved the strain measurement accuracy by providing better precision especially under large deformation. Also, the deconvolution of confocal images improved the accuracy of the measurement in the direction of the optical axis. These results shows that the proposed technique is well-suited for investigating cell-matrix mechanical interactions as well as for obtaining local constitutive properties of soft biological materials including tissues in 3-D. © Society for Experimental Mechanics 2007.

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Published In

Experimental Mechanics

DOI

EISSN

1741-2765

ISSN

0014-4851

Publication Date

June 1, 2007

Volume

47

Issue

3

Start / End Page

427 / 438

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4017 Mechanical engineering
  • 4005 Civil engineering
  • 0915 Interdisciplinary Engineering
  • 0913 Mechanical Engineering
  • 0905 Civil Engineering
 

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Franck, C., Hong, S., Maskarinec, S. A., Tirrell, D. A., & Ravichandran, G. (2007). Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation. Experimental Mechanics, 47(3), 427–438. https://doi.org/10.1007/s11340-007-9037-9
Franck, C., S. Hong, S. A. Maskarinec, D. A. Tirrell, and G. Ravichandran. “Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation.” Experimental Mechanics 47, no. 3 (June 1, 2007): 427–38. https://doi.org/10.1007/s11340-007-9037-9.
Franck C, Hong S, Maskarinec SA, Tirrell DA, Ravichandran G. Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation. Experimental Mechanics. 2007 Jun 1;47(3):427–38.
Franck, C., et al. “Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation.” Experimental Mechanics, vol. 47, no. 3, June 2007, pp. 427–38. Scopus, doi:10.1007/s11340-007-9037-9.
Franck C, Hong S, Maskarinec SA, Tirrell DA, Ravichandran G. Three-dimensional full-field measurements of large deformations in soft materials using confocal microscopy and digital volume correlation. Experimental Mechanics. 2007 Jun 1;47(3):427–438.
Journal cover image

Published In

Experimental Mechanics

DOI

EISSN

1741-2765

ISSN

0014-4851

Publication Date

June 1, 2007

Volume

47

Issue

3

Start / End Page

427 / 438

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4017 Mechanical engineering
  • 4005 Civil engineering
  • 0915 Interdisciplinary Engineering
  • 0913 Mechanical Engineering
  • 0905 Civil Engineering