Abstract
The aim of this study is to measure displacement fields during an experiment on a structure by using a priori information about its surface representation in a stereoDIC framework. The main goal of the present method is to measure the displacement and strain fields in formalisms completely consistent with the surface description via global stereoDIC. Although the majority of stereoDIC methods provide clouds of 3D displacement vectors associated with clouds of 3D points, which are subsequently interpolated to get continuous fields, the proposed CAD-based stereoDIC allows continuous 3D displacement fields to be measured directly. Therefore, there is a direct link between the measured fields and computational results since common shape and kinematic bases are considered. No additional interpolation or data manipulation is needed with such approaches. One practical example will illustrate the use of this novel technique.
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