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.
Strain Field Measurement in the Vicinity of Ductile Rupture from Digital Image Correlation
Sae Int. J. Mater. Manf
Sae International Journal of Materials and Manufacturing
SAE World Congress & Exhibition ; 2008
Sae International Journal of Materials and Manufacturing ; 1 , 1 ; 427-432
2008-04-14
6 pages
Aufsatz (Konferenz)
Englisch
Strain field measurement in the vicinity of ductile rupture from digital image correlation
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