“Finite-Element” Displacement Fields Analysis from Digital Images: Application to Portevin–Le Châtelier Bands |
| |
Authors: | G Besnard F Hild S Roux |
| |
Institution: | (1) LMT-Cachan, ENS de Cachan/CNRS-UMR 8535/, Université Paris 6, 61 avenue du Président Wilson, F-94235 Cachan Cedex, France;(2) Unité Mixte CNRS/Saint-Gobain Surface du Verre et Interfaces 39 quai Lucien Lefranc, F-93303 Aubervilliers Cedex, France |
| |
Abstract: | A new methodology is proposed to estimate displacement fields from pairs of images (reference and strained) that evaluates
continuous displacement fields. This approach is specialized to a finite-element decomposition, therefore providing a natural
interface with a numerical modeling of the mechanical behavior used for identification purposes. The method is illustrated
with the analysis of Portevin–Le Chatelier bands in an aluminum alloy sample subjected to a tensile test. A significant progress
with respect to classical digital image correlation techniques is observed in terms of spatial resolution and uncertainty. |
| |
Keywords: | Digital image correlation Localization Resolution Texture Uncertainty |
本文献已被 SpringerLink 等数据库收录! |
|