Skip to Main content Skip to Navigation
New interface
Journal articles

Elastoplastic behavior identification for heterogeneous loadings and materials

Félix Latourte 1 Andre Chrysochoos 1 Stéphane Pagano 2 Bertrand Wattrisse 1 
1 ThM2 - ThermoMécanique des Matériaux
LMGC - Laboratoire de Mécanique et Génie Civil
2 M3 - Modélisation Mathématique en Mécanique
LMGC - Laboratoire de Mécanique et Génie Civil : UMR 5508
Abstract : Image processing techniques provide access to full field measurements of different thermomechanical data (strain; strain-rate; temperature ...). These techniques have become increasingly useful for obtaining fine and local descriptions of material properties. As they can measure complete thermal and mechanical fields, they can be used to identify several parameters of constitutive equations during a single deformation process using specifically designed heterogeneous tests. In Geymonat and Pagano (Meccanica 38:535-545, 2003), surface strain fields obtained by digital image correlation were used to identify the distribution of elastic parameters and stress fields by minimizing a given energy functional. In this paper, the previous method is improved through a relevant choice for stress approximation, and then extended to a wider class of elastoplastic materials. Its reliability is then checked through applications on simulated data obtained under small perturbation and plane stress assumptions. In particular, the robustness of the method with respect to measurement noise is studied on the basis of numerical data. An experimental application to heterogeneous material identification is finally proposed.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-00347461
Contributor : Stéphane Pagano Connect in order to contact the contributor
Submitted on : Friday, December 19, 2008 - 9:21:25 AM
Last modification on : Thursday, October 13, 2022 - 8:21:55 AM
Long-term archiving on: : Tuesday, June 8, 2010 - 5:19:03 PM

File

Exp_Ident.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Félix Latourte, Andre Chrysochoos, Stéphane Pagano, Bertrand Wattrisse. Elastoplastic behavior identification for heterogeneous loadings and materials. Experimental Mechanics, 2008, 48, pp.435-449. ⟨10.1007/s11340-007-9088-y⟩. ⟨hal-00347461⟩

Share

Metrics

Record views

161

Files downloads

443