Local, Three-Dimensional Strain Measurements Within Largely Deformed Extracellular Matrix Constructs

[+] Author and Article Information
Blayne A. Roeder, Klod Kokini

Department of Biomedical Engineering, Purdue University, 500 Central Drive, West Lafayette, IN 47907-2022 School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088

J. Paul Robinson, Sherry L. Voytik-Harbin

Department of Biomedical Engineering, Purdue University, 500 Central Drive, West Lafayette, IN 47907-2022, USAand Department of Basic Medical Sciences, Purdue University, 625 Harrison Street, West Lafayette, IN 47907-2026

J Biomech Eng 126(6), 699-708 (Feb 04, 2005) (10 pages) doi:10.1115/1.1824127 History: Received January 06, 2004; Revised June 10, 2004; Online February 04, 2005
Copyright © 2004 by ASME
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Grahic Jump Location
The effect of filtering on displacement measurement precision (standard deviation) as a function of subvolume size. Correlation values obtained for individual subvolumes were selectively removed based upon defined signal to noise ratio.
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A series of 3D confocal reflection images (shown as 2D projections) representing a correlated subvolume within a collagen ECM during incremental mechanical loading as tracked by the IVDC algorithm
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Progressive volumetric deformation and changes in the microlevel strain distribution for a region within a mechanically loaded collagen ECM. Maximum principle strain (extensional stretch) is plotted on the contour for applied macro level strains of (a) 0; (b) 0.1; (c) 0.2; and (d) 0.3. Original image represents a 100×100×25 μm3 volume within the collagen ECM.
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Changes in the six independent components of the Lagrangian strain (means over the entire volume evaluated) as the external mechanical load was incrementally increased. Error bars indicate standard deviation.




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