A computational approach to design new tests for viscoplasticity characterization at high strain-rates

Autor:	Pascal Bouda, Delphine Notta-Cuvier, Bertrand Langrand, Eric Markiewicz, Fabrice Pierron
Přispěvatelé:	DMAS, ONERA [Lille], ONERA, Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), University of Southampton
Rok vydání:	2019
Předmět:	IMAGE-BASED INERTIAL IMPACT Statically indeterminate Inertial frame of reference IMPACT METHODE DES CHAMPS VIRTUELS Computer science Computational Mechanics Ocean Engineering 02 engineering and technology 01 natural sciences [SPI]Engineering Sciences [physics] Acceleration VISCOPLASTICITY 0203 mechanical engineering Range (statistics) [CHIM]Chemical Sciences ESSAI D'IMPACT INERTIEL 0101 mathematics [PHYS]Physics [physics] TEST Viscoplasticity OPTIMISATION Applied Mathematics Mechanical Engineering Finite element method 010101 applied mathematics Computational Mathematics Identification (information) 020303 mechanical engineering & transports Computational Theory and Mathematics Identifiability Biological system VIRTUAL FIELD METHOD VISCOPLASTICITE
Zdroj:	Computational Mechanics Computational Mechanics, Springer Verlag, 2019, ⟨10.1007/s00466-019-01742-y⟩
ISSN:	1432-0924 0178-7675
DOI:	10.1007/s00466-019-01742-y
Popis:	International audience; Rate-dependent behaviour characterization of metals at high strain rate remains challenging mainly because of the strong hypotheses when tests are processed with statically determinate approaches. As a non-standard methodology, Image-Based Inertial Impact (IBII) test has been proposed to take advantage of the dynamic Virtual Fields Method (VFM) which enables the identification of constitutive parameters with strain and acceleration fields. However, most of the test parameters (e.g. projectile velocity, specimen geometry) are not constrained. Therefore, an FE-based approach is addressed to optimize the identification over a wide range of strain and strain-rate, according to two design criteria: (1)-the characterized viscoplastic spectra (2)-the identifiability of the parameters. Whereas the first criterion is assessed by processing the FEA simulations, the second is rated extracting material parameters using synthetic images to input the VFM. Finally, uncertainties regarding the identification of material constants are quantified for each IBII test configuration and different camera performances.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5654e9b32f6b86362bdd555548a4c4ab https://doi.org/10.1007/s00466-019-01742-y Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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