Abstract
AbstractOptical 3D field measuring systems, based on DIC (Digital Image Correlation) deliver kinematic quantities. They are appropriate devices helping to understand the material behavior especially at high strains. One problem of these systems is the missing information about material points located behind the observed surface of the specimen, which is needed to assign the full deformation gradient. Different ways of dealing with raw point coordinate data that is confidently given by the metrology system lead to different kinematic results. To ensure the correctness of strain‐like results determined by the system, they are compared to analytical and finite element calculations. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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