2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 1: Aifantis Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Bordas S, Estrin Y |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-24-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Validation And Identification Of Gradient-Elasticity From Full-Field Measurements
Julien Rethore1; Christine Kaltenbrunner2; Thi Bach Tuyet Dang2; Philippe Chaudet2;1LAMCOS INSA LYON,CNRS, Villeurbanne, France; 2UNIVERSITE DE LYON, INSA LYON, Villeurbanne, France;
Type of Paper: Regular
Id Paper: 71
Topic: 1
Abstract:
Gradient-elasticity and more generally gradient-enhanced continuum models have been extensively developed since the beginning of the twentieth century. These models have shown the ability to account for the effect of the underlying material heterogeneity at the macroscopic scale of the continuum. Despite of a great theoretical interest, gradient-enhanced models are usually difficult to interpret physically and even more to identify experimentally. This paper proposes an attempt to validate and identify a gradient-elasticity model for a material with a periodic micro-structure from experimental data. A set of dedicated experimental and numerical tools is developed for this purpose: first, the design of an experiment, then two-scale displacement field measurements by digital image correlation and dedicated pro-processing techniques and finally a model updating technique. This paper ends up with the full set of first and second-order elastic constants of a gradient-elasticity model which macroscopic kinematic has been validated by investigating the deformation of the unit cells at the microscopic scale.
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