Journal
IUTAM SYMPOSIUM ON FULL-FIELD MEASUREMENTS AND IDENTIFICATION IN SOLID MECHANICS, 2011
Volume 4, Issue -, Pages 73-81Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.piutam.2012.05.009
Keywords
Bulge test; thin film; displacement measurement; strain and curvature fields
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The miniature bulge test is a known method for characterizing the full stress-strain response of freestanding thin films. However, some discrepancies between quantitative results in the literature may be attributed to erroneous assumptions on the bulge shape. In this research, a specialized global Digital Image Correlation technique is developed that circumvents the need for bulge shape assumptions by correlating directly high-resolution profilometry maps of bulged membranes to yield full-field continuous displacement maps, from which local strain maps can be computed. Additionally, local curvature maps are also derived. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of H.D. Espinosa and F. Hild.
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