35 巻 (2017) 4 号 p. 154-159
Two-dimensional digital image correlation (2D-DIC) is a computer-based, non-contacting, surface deformation measurement. Using this method, the strain field was measured in the welded joint under tension. Due to the different mechanical properties, the strains are inhomogeneous in the different parts of the welded joint. Their differences were revealed, and the strain evolution in each part of the welded joint was estimated.