Browsing by Author "Visser, C"
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- ItemError correction in 2D-digital image correlation strain measurements due to out-of-plane motion.(Stellenbosch : Stellenbosch University, 2023-11) Visser, C; Venter, G; Neaves, M; Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering.ENGLISH ABSTRACT: Digital image correlation (DIC) can be performed as eithermulti-camera stereo-DIC or single-camera 2D-DIC. Stereo-DIC is generally preferred as it corrects for errors from out-of-plane motion, giving it superior accuracy, despite 2DDIC being both computationally and financially less expensive, and being more user-friendly. This study proposes a strain gauge-based error compensation method for the compensation of strain errors in 2D-DIC due to out-of plane motion. The method was initially developed by considering the theoretical strain errors from out-of-plane motion in 2D-DIC and was then applied in a numerical simulation as a proof-of-concept. Two sets of validation experiments were then performed on two different specimen geometries which demonstrated an improvement in the accuracy of the 2D-DIC strain data in both cases. This makes 2D-DIC a more attractive option for measuring fullfield strains, particularly in cases where stereo-DIC is not an option.