Performance assessment of integrated digital image correlation versus FEM updating

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Abstract

Full-field identification methods can adequately identify constitutive material parameters, by combining Digital Image Correlation (DIC) with Finite Element (FE) simulation. It is known that interpolation within the DIC procedure is an important error source for DIC-results. In this study, the influence of these errors on the eventual identification results is investigated. Virtual experiments are conducted from which constitutive parameters are identified by two approaches: the commonly used method of Finite Element Model Updating (FEMU) and the more recent method of Integrated Digital Image Correlation (IDIC), in which the utilized interpolation functions are varied, and the influence on the identified parameters is investigated. It was found that image-interpolation has a significant effect on the accuracy of both methods. However, the observed differences in results between the two methods of FEMU and IDIC cannot be explained by interpolation errors.

Original languageEnglish
Title of host publicationConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer
Pages11-15
Number of pages5
Volume9
ISBN (Print)978-3-319-21764-2
DOIs
Publication statusPublished - 2016
Event2015 SEM Annual Conference and Exposition on Experimental and Applied Mechanics - Costa Mesa, United States
Duration: 8 Jun 201511 Jun 2015

Conference

Conference2015 SEM Annual Conference and Exposition on Experimental and Applied Mechanics
CountryUnited States
CityCosta Mesa
Period8/06/1511/06/15

Keywords

  • Digital Image Correlation (DIC)
  • FEMU
  • Finite Element Method (FEM)
  • Integrated DIC
  • Interpolation errors
  • Inverse parameter identification

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