Internal variable modeling of the high strain-rate behavior of metals with applications to multiphase steels

Autor:	Alain Molinari, Alexis Rusinek, L. Durrenberger
Rok vydání:	2008
Předmět:	Materials science Mechanical Engineering Effective stress Constitutive equation Mechanical engineering Function (mathematics) Mechanics Strain rate Plasticity Flow stress Condensed Matter Physics Mechanics of Materials Phenomenological model Range (statistics) General Materials Science
Zdroj:	Materials Science and Engineering: A. 478:297-304
ISSN:	0921-5093
DOI:	10.1016/j.msea.2007.06.011
Popis:	A phenomenological constitutive model with a single internal parameter is proposed to characterize the behavior of metals for a large range of strain-rate. The flow stress is defined as the sum of an internal stress, representing long range interactions, with an effective stress which is thermally activated. The internal stress is a function of a single internal parameter which allows us to describe strain-hardening effects. This model is used to reproduce the behavior of four multiphase cold rolled steels which are new high performance materials for the automotive industry. The model predictions show a very good agreement with experimental results for a wide range of strain-rate 8 × 10 −3 s −1 ≤ e ˙ ≤ 10 3 s −1 . In addition, strain-rate history effects are well accounted for.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::60a8c9016edc4cc462002cb5dbf9aeae https://doi.org/10.1016/j.msea.2007.06.011 Zobrazit plný text záznamu Full Text from ScienceDirect