Titolo:  A Meshless Global DIC Approach
Data di pubblicazione:  2016
Autori:  Baldi, Antonio; Bertolino, Filippo
Presenza coautori internazionali:  no
Lingua:  Inglese
Titolo del libro:  Advancement of Optical Methods in Experimental Mechanics, Volume 3. Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
ISBN:  978-331922445-9
Editore:  Springer
Tutti i curatori:  Helena Jin, Sanichiro Yoshida, Luciano Lamberti, Ming-Tzer Lin
Pagina iniziale:  175
Pagina finale:  180
Numero di pagine:  6
Digital Object Identifier (DOI):  http://dx.doi.org/10.1007/978-3-319-22446-6_22
Codice identificativo Scopus:  2-s2.0-84952359758
Revisione (peer review):  Esperti anonimi
Nome del convegno:  Annual Conference on Experimental and Applied Mechanics, 2015
Periodo del convegno:  June 8-11, 2015
Luogo del convegno:  Costa Mesa, CA, USA
Abstract:  The formulation of global Digital Image Correlation (DIC) is almost identical to standard (i.e. subset-based) DIC: indeed, in both cases the solution algorithm tries to minimize the error between the reference and test image by adjusting the shape- function-controlling parameters, but in the former, a modification of the parameters affects the displacement field globally, whereas in standard DIC the modification is local. There are several ways to implement a global DIC program, but the approach most used relies on a Finite-Element-like mesh. This solution gives maximum flexibility with regard to description of the computational domain, but it makes it difficult to implement adaptive algorithms because a complete re-meshing infrastructure has to be employed. Considering that normally DIC codes are used to analyze relatively simple domains, this work propose to replace the standard FEA formulation with a mesh-less description of the displacement field; using Shepard's approach, a partition of unity can easily be constructed, thus allowing for a simple and flexible description of the global displacement field.
Tipologia: 4.1 Contributo in Atti di convegno

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