Effect of DIC Spatial Resolution, Noise and Interpolation Error on Identification Results with the VFM

• DOI: 10.1111/str.12134
• Publication Date: 2015-03-24T23:52:14Z
• Authors: M. Rossi; P. Lava; F. Pierron; D. Debruyne; M. Sasso
• Keywords: Digital image correlation; Identification; Interpolation

Abstract The use of experimental tests that involve full‐field measurements to characterize mechanical material properties is becoming more widespread within the engineering community. In particular digital image correlation (DIC) on white light speckles one most used tools, thanks relatively low cost equipment and availability dedicated software. Nonetheless impact measurement errors identified parameters still not completely understood. To this purpose, in paper, a simulator able numerically simulate an test, which involves DIC presented. chosen test Unnotched Iosipescu identify orthotropic elastic composites. Synthetic images are generated then analysed by DIC. Eventually obtained strain maps with Virtual Fields Method (VFM). numerical propagating through simulation procedure carefully characterized. Besides, compare performances grid method identification process VFM. Finally, influence settings error studied as function camera noise level, order find best testing configuration.