Full-field identification methods: comparison of FEM updating and integrated DIC

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Full-field identification methods are increasingly used to adequately identify constitutive parameters to describe the mechanical behavior of materials. This research investigates the more recently introduced, one-step method of Integrated Digital Image Correlation (IDIC) with respect to the most commonly used, two-step method of Finite Element Model Updating (FEMU), which uses a subset-based digital image correlation algorithm. To make the comparison as objective as possible, both methods are implemented in the most equivalent manner and use the same FE-model. Various virtual test-cases are studied to assess the performance of both methods when subjected to different error sources: (1) systematic errors, (2) poor initial guesses for the constitutive parameters, (3) image noise, (4) constitutive model errors, and (5) experimental errors. Results show that, despite the mathematical similarity of both methods, IDIC produces less erroneous and more reliable results than FEMU, particularly for more challenging test-cases exhibiting small displacements, complex kinematics, misalignment of the specimen, and image noise.

Originele taal-2Engels
TitelAdvancement of Optical Methods in Experimental Mechanics, Volume 3
SubtitelProceedings of the 2016 Annual Conference on Experimental and Applied Mechanics
RedacteurenS. Yoshida, L. Lamberti, C. Siammarella
Plaats van productieDordrecht
UitgeverijSpringer
Pagina's191-197
Aantal pagina's7
ISBN van elektronische versie978-3-319-41600-7
ISBN van geprinte versie978-3-319-41599-4
DOI's
StatusGepubliceerd - 2017
Evenement2016 SEM International Congress and Exposition on Experimental and Applied Mechanics - Hilton Orlando Lake Buena Vista, Orlando, Verenigde Staten van Amerika
Duur: 6 jun 20169 jun 2016

Publicatie series

NaamConference Proceedings of the Society for Experimental Mechanics Series
Volume2017

Congres

Congres2016 SEM International Congress and Exposition on Experimental and Applied Mechanics
LandVerenigde Staten van Amerika
StadOrlando
Periode6/06/169/06/16

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