%0 Journal Article
%T Fast four
%A Amine Bouterf
%A Ante Buljac
%A Cl¨¦ment Jailin
%A Fran£¿ois Hild
%A St¨¦phane Roux
%J The Journal of Strain Analysis for Engineering Design
%@ 2041-3130
%D 2019
%R 10.1177/0309324718810593
%X A projection-based digital volume correlation method (presented in a companion paper) is extended to an integrated approach for the calibration of an elastoplastic law based on a single radiograph per loading step. Instead of following a two-step sequential procedure (i.e. first, measurement of the displacement field; second, identification), the integrated method aims at identifying few model parameters directly from the gray-level projections. The analysis of an in situ tensile test composed of 127 loading steps performed in 6 min is presented. An isotropic elastoplastic constitutive law with free-form hardening behavior (i.e. controlled by only eight parameters) is identified and shows a ductile behavior (up to 6.3% strain before failure). A large improvement on the residual quality is shown and validates the proposed model and procedure. The obtained displacement fields are similar to those measured with no mechanical integration. A different parameterization of the constitutive law provides a very close result, thereby assessing the robustness of the procedure
%K Tomography
%K in situ tests
%K four-dimensional measurement
%K inverse methods
%K integrated digital volume correlation
%K projection-based digital volume correlation
%U https://journals.sagepub.com/doi/full/10.1177/0309324718810593