Demodulation of Spatial Carrier Images: Performance Analysis of Several Algorithms Using a Single Image
TypeArticles dans des revues avec comité de lecture
Optical full-field techniques have a great importance in modern experimental mechanics. Even if they are reasonably spread among the university laboratories, their diffusion in industrial companies remains very narrow for several reasons, especially a lack of metrological performance assessment. A full-field measurement can be characterized by its resolution, bias, measuring range, and by a specific quantity, the spatial resolution. The present paper proposes an original procedure to estimate in one single step the resolution, bias and spatial resolution for a given operator (decoding algorithms such as image correlation, low-pass filters, derivation tools ...). This procedure is based on the construction of a particular multi-frequential field, and a Bode diagram representation of the results. This analysis is applied to various phase demodulating algorithms suited to estimate in-plane displacements.
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Assessment of Digital Image Correlation Measurement Accuracy in the Ultimate Error Regime: Main Results of a Collaborative Benchmark AMIOT, Fabien; BORNERT, Michel; DOUMALIN, Pascal; DUPRE, Jean Christophe; FAZZINI, Marina; ORTEU, Jean José; POILANE, Christophe; ROBERT, Laurent; ROTINAT, René; TOUSSAINT, Evelyne; WATTRISSE, Bertrand; WIENIN, Jean Samuel (Wiley Publishing Ltd, 2013)We report on the main results of a collaborative work devoted to the study of the uncertainties associated with Digital image correlation techniques (DIC). More specifically, the dependence of displacement measurement ...
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Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir welds COMMIN, Loreleï; DUMONT, Myriam; ROTINAT, René; PIERRON, Fabrice; MASSE, Jean-Eric; BARRALLIER, Laurent (Elsevier, 2012)Friction stir welding induces a microstructural evolution and residual stresses that will influence the resulting mechanical properties. Friction stir welds produced from magnesium alloy hot rolled plates were studied. ...