TY - GEN
T1 - Comparing 2D and 3D digital image correlation for an inflation test
AU - Murienne, Barbara J.
AU - Nguyen, Thao D.
N1 - Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - 3D digital image correlation (DIC) is widely used in biomechanics to measure the deformation of 3D structures. However, 3D-DIC implementation can be challenging under specific conditions, such as high magnification (i.e. low depth of focus) or environment with limited access for two-angled cameras. Here, we aimed to compare 2D-DIC and 3D-DIC for the same inflation test, to evaluate 2D-DIC as an alternative to 3D-DIC under those conditions. A two-camera stereovision system acquired top-down images of a membrane inflated vertically to 5.41 kPa (reference pressure), then to 7.87 kPa (deformed pressure), while a single camera system simultaneously recorded side images. 2D-DIC and 3D-DIC were used to calculate vertical (out of membrane plane) and horizontal (in membrane plane) displacements, and meridional strain. Under inflation, the variability in displacements and strains was larger than under static conditions for both DIC methods. 2D-DIC showed a smaller variability than 3D-DIC, especially in the vertical displacements, and the absolute difference between the averaged 3D-DIC and 2D-DIC data was in the range of the 3D-DIC variability. The meridional strain uncertainty was similar between both DIC methods. Those findings suggests that 2D-DIC might be an alternative to 3D-DIC for inflation under certain conditions.
AB - 3D digital image correlation (DIC) is widely used in biomechanics to measure the deformation of 3D structures. However, 3D-DIC implementation can be challenging under specific conditions, such as high magnification (i.e. low depth of focus) or environment with limited access for two-angled cameras. Here, we aimed to compare 2D-DIC and 3D-DIC for the same inflation test, to evaluate 2D-DIC as an alternative to 3D-DIC under those conditions. A two-camera stereovision system acquired top-down images of a membrane inflated vertically to 5.41 kPa (reference pressure), then to 7.87 kPa (deformed pressure), while a single camera system simultaneously recorded side images. 2D-DIC and 3D-DIC were used to calculate vertical (out of membrane plane) and horizontal (in membrane plane) displacements, and meridional strain. Under inflation, the variability in displacements and strains was larger than under static conditions for both DIC methods. 2D-DIC showed a smaller variability than 3D-DIC, especially in the vertical displacements, and the absolute difference between the averaged 3D-DIC and 2D-DIC data was in the range of the 3D-DIC variability. The meridional strain uncertainty was similar between both DIC methods. Those findings suggests that 2D-DIC might be an alternative to 3D-DIC for inflation under certain conditions.
KW - 2D profile measurements
KW - 3D full-field measurements
KW - Digital image correlation
KW - Inflation
KW - Mechanical testing
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U2 - 10.1007/978-3-319-21455-9_7
DO - 10.1007/978-3-319-21455-9_7
M3 - Conference contribution
AN - SCOPUS:84952000112
SN - 9783319214542
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 61
EP - 67
BT - Mechanics of Biological Systems and Materials - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
A2 - Korach, Chad S.
A2 - Tekalur, Srinivasan Arjun
A2 - Zavattieri, Pablo
PB - Springer New York LLC
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
Y2 - 8 June 2015 through 11 June 2015
ER -