1. Characterization of the nonlinear behavior of nodular graphite cast iron via inverse identification–Analysis of uniaxial tests
- Author
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Zvonimir Tomičević, Janoš Kodvanj, François Hild, Department of Engineering Mechanics, Faculty of Mechanical Engineering and Naval Architecture [Zagreb], University of Zagreb-University of Zagreb, Laboratoire de Mécanique et Technologie (LMT), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), Bourse Eiffel, and ANR-10-EQPX-0037,MATMECA,MATériaux-MECAnique/Elaboration-Caractérisation-Observation-Modélisation-Simulation(2010)
- Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph] ,010309 optics ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Mechanics of Materials ,Mechanical Engineering ,0103 physical sciences ,General Physics and Astronomy ,digital image correlation ,digital volume correlation ,full-field measurements ,material parameter identification ,nonlinear constitutive laws ,General Materials Science ,02 engineering and technology ,01 natural sciences - Abstract
International audience; The aim of this work is to estimate the parameters of elastoplastic and damage laws for nodular graphite cast iron from a cyclic uniaxial test on a dog-bone sample. The paper focuses on the identification of material parameters coupling finite element models and full-field measurements. The gap between the measured and simulated data is used to estimate the quality of the proposed constitutive postulates. Last, a cyclic uniaxial experiment is carried out in a lab tomograph to reveal the damage micro-mechanism. Digital volume correlation is used to measure displacement fields in the bulk of the sample. The correlation residuals are used to detect the damage mechanism occurring in the heterogeneous microstructure of the material.
- Published
- 2016
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