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Strain Field Measurement in the Vicinity of Ductile Rupture from Digital Image Correlation
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 14, 2008 by SAE International in United States
Citation: Savic, V. and Hector, L., "Strain Field Measurement in the Vicinity of Ductile Rupture from Digital Image Correlation," SAE Int. J. Mater. Manf. 1(1):427-432, 2009, https://doi.org/10.4271/2008-01-0856.
A methodology that enables two-dimensional strain field measurement in the vicinity of ductile rupture is described. Fully martensitic steel coupons were strained to fracture using a miniature tensile stage with custom data and image acquisition systems. Rupture initiated near the center of each coupon and progressed slowly toward the gage section edges. A state-of-the-art digital image correlation technique was used to compute the true strain field before rupture initiation and ahead of the resulting propagating macroscopic crack before final fracture occurred. True strains of the order of 95% were measured ahead of the crack at later stages of deformation.