Work

On the identification of rigid body boundary conditions from full-field measurements

Year: 2025

Type: article

Abstract: This study presents a method to identify Dirichlet boundary conditions (BCs) and constitutive parameters from heterogeneous experimental data, solving a multi-objective optimization problem. The BCs are parameterized as remote rigid body motions leading to a very low number of unknowns and allowing for faster convergence. This methods enables for accurate models of material and structural tests to be obtained. A comparison with classical methods of BC determination is introduced, demonstrating the advantages of the proposed approach. The identified models are evaluated by introducing a validation metric based on experimental data and their uncertainties. The approach is illustrated by using a multi-instrumented tensile test on a well-characterized material. Beyond this validation example, the introduced method paves the way for improved model updating of large-scale tests. • A reduced model for boundary conditions identification method is proposed. • Boundary conditions are accurately determined outside the measurement area. • A quality metric is introduced to better evaluate and compare models. • The study accounts for measurement uncertainties.

Source: International Journal of Solids and Structures

DOI: 10.1016/j.ijsolstr.2025.113768

Authors: Antoine Vintache, Pierre Baudoin, Renaud Gras, Florent Mathieu, François Hild

Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, CentraleSupélec, Laboratoire de Mécanique Paris-Saclay

Language: English

Topic: Optical measurement and interference techniques

Subfield: Computer Vision and Pattern Recognition

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,790

Funder: Association Nationale de la Recherche et de la Technologie