Fast four-dimensional tensile test monitored via X-ray computed tomography: Elastoplastic identification from radiographs

Abstract : A Projection-based Digital Image Correlation (P-DVC) 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 minutes is presented. An isotropic elastoplastic constitutive law with free form hardening behavior (i.e., controlled by only 8 parameters) is identified and shows a very 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 revealed to be similar to those measured with no mechanical integration. A different parameterization of the constitutive law provides a very similar result, thereby assessing the robustness of the procedure.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01926380
Contributor : François Hild <>
Submitted on : Monday, November 19, 2018 - 11:04:53 AM
Last modification on : Friday, May 17, 2019 - 10:52:10 AM
Long-term archiving on : Wednesday, February 20, 2019 - 1:32:42 PM

File

JSA2018c-ccsd.pdf
Files produced by the author(s)

Identifiers

Citation

Clément Jailin, Ante Buljac, Amine Bouterf, François Hild, Stéphane Roux. Fast four-dimensional tensile test monitored via X-ray computed tomography: Elastoplastic identification from radiographs. Journal of Strain Analysis for Engineering Design, SAGE Publications, 2019, 54 (1), pp.44-53. ⟨10.1177/0309324718810593⟩. ⟨hal-01926380⟩

Share

Metrics

Record views

82

Files downloads

136