Identification of crystal plasticity parameters using DIC measurements and weighted FEMU

Abstract : An inverse method for the identification of a set of crystal plasticity parameters is introduced and applied to in situ tensile tests on steel polycrystals. Various mean grain sizes are obtained with different conditioning of AISI 316LN austenitic stainless steel. Identification is based on a weighted Finite Element Model Updating (FEMU) using both displacement fields at the microscale and macroscopic load levels. The values of the identified parameters depend on the factor weighing the contributions of the microscopic and macroscopic quantities. On the one hand, surface displacement fields are measured by Digital Image Correlation (DIC). On the other hand, they are simulated by resorting to Finite Element calculations with a local crystal plasticity law (i.e., Méric-Cailletaud's model) and a 2D simulation of the microstructure. The parameters associated with isotropic hardening are calibrated for the different mean grain sizes. The benefits of considering full-field measurements are manifest for instance in the excellent Hall-Petch trend captured at the microstructural scale. The identification procedure is also applied to the estimation of hardening parameters describing the interaction between slip systems.
Complete list of metadatas

Cited literature [26 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01383934
Contributor : François Hild <>
Submitted on : Wednesday, October 19, 2016 - 2:02:34 PM
Last modification on : Tuesday, May 14, 2019 - 10:57:22 AM

File

MOM2016-ccsd.pdf
Files produced by the author(s)

Identifiers

Citation

Adrien Guery, François Hild, Félix Latourte, Stéphane Roux. Identification of crystal plasticity parameters using DIC measurements and weighted FEMU. Mechanics of Materials, Elsevier, 2016, 100, pp.55 - 71. ⟨10.1016/j.mechmat.2016.06.007⟩. ⟨hal-01383934⟩

Share

Metrics

Record views

164

Files downloads

318