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Author Tiwari, Vikrant
Title Image correlation with applications for shape and deformation measurements
book jacket
Descript 157 p
Note Source: Dissertation Abstracts International, Volume: 69-11, Section: B, page: 7110
Adviser: Michael A. Sutton
Thesis (Ph.D.)--University of South Carolina, 2008
With recent developments in the field of high speed image acquisition systems, especially increase in speed and image quality, and with concurrent enhancement of 2D and 3D Digital Image Correlation Method (DICM) capabilities, it is now possible to measure surface shape and deformations in a wide range of applications, including biomechanics, fracture mechanics, non-destructive evaluation and material property measurements. The method provides the ability to measure displacements with sub-pixel accuracy from digital images by accurately matching subsets from images obtained from the undeformed and deformed states. Up until recently, DIC has been limited to mostly quasi-static and moderately slow strain rate applications. In this work, an effort has been made to characterize and calibrate ultra high-speed image acquisition systems using (a) a single camera to acquire 2D surface deformations and (b) two cameras in a stereo-vision system to obtain 3D surface deformations. Both quasi-static (simple translation and uni-axial tension) and dynamic (metal sheet subjected to the dynamic loading conditions) measurements have been obtained to evaluate the potential of DICM in conjunction with ultra high speed camera systems
Information gathered during this work provides valuable insight regarding material behavior under dynamic loading conditions. The results have confirmed the value of DICM as a robust measurement tool for both static and transient measurements
School code: 0202
Host Item Dissertation Abstracts International 69-11B
Subject Applied Mechanics
Engineering, Mechanical
Computer Science
0346
0548
0984
Alt Author University of South Carolina. Mechanical Engineering
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