On micromechanical parameter identification and the role of kinematic boundary conditions

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Abstract

Integrated Digital Image Correlation (IDIC) necessitates a mechanical model with appropriate boundary conditions, geometry, and constitutive laws. Because boundary conditions are applied on the entire specimen, they by definition lie outside the employed field of view in micromechanical parameter identification. To avoid excessive computational cost by modelling the entire specimen, Microstructural Volume Element (MVE) is used instead in IDIC, which requires micromechanical kinematic boundary conditions. The aim of this contribution is to examine the influence of errors in boundary conditions prescribed to MVE on the accuracy of micromechanical parameter identification in IDIC. It is shown that relatively small errors in micromechanical boundary conditions may yield significant inaccuracies in the identified material parameters, and that all microstructural features need to be captured.
Original languageEnglish
Title of host publicationPhotomechanics 2018 (PM 2018), 20-22 march 2018, Toulouse, France
Pages109-110
Number of pages2
Publication statusPublished - 23 Mar 2018
Event2018 Photomechanics - Hotel Mercure Compans Cafarelli, Toulouse, France
Duration: 20 Mar 201822 Mar 2018
http://photomech2018.sciencesconf.org

Conference

Conference2018 Photomechanics
Abbreviated titlePM 2018
CountryFrance
CityToulouse
Period20/03/1822/03/18
OtherInternational conference on full-field measurement techniques and their applications in experimental solid mechanics
Internet address

Keywords

  • Integrated Digital Image Correlation
  • micromechanics
  • parameter identification
  • virtual experiments
  • boundary conditions

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