Abstract: The present paper is concerned with the modeling of superplasticity phenomenon in metallic materials using a continuum damage theory. The goal is to propose a one-dimensional phenomenological damage model, as simple as possible, able to perform a mathematically correct and physically realistic description of plastic deformations, strain hardening, strain softening, strain rate sensitivity and damage (nucleation and growth of voids) observed in tensile tests performed at different strain rates. Only two tensile tests at different controlled strain rates are necessary to obtain all the material parameters that appear in the theory. Examples concerning the modeling of tensile tests of a magnesium alloy at different strain rates are presented and analyzed. The results obtained show a very good agreement between experimental results and model prevision.
MODELING SUPERPLASTICITY PHENOMENOM IN METALLIC MATERIALS USING A CONTINUUM DAMAGE THEORY / Costa Mattos H; Minak G. - ELETTRONICO. - (2009). (Intervento presentato al convegno 20th International Congress of Mechanical Engineering tenutosi a Gramado, RS, Brasil nel November 15-20, 2009).
MODELING SUPERPLASTICITY PHENOMENOM IN METALLIC MATERIALS USING A CONTINUUM DAMAGE THEORY
MINAK, GIANGIACOMO
2009
Abstract
Abstract: The present paper is concerned with the modeling of superplasticity phenomenon in metallic materials using a continuum damage theory. The goal is to propose a one-dimensional phenomenological damage model, as simple as possible, able to perform a mathematically correct and physically realistic description of plastic deformations, strain hardening, strain softening, strain rate sensitivity and damage (nucleation and growth of voids) observed in tensile tests performed at different strain rates. Only two tensile tests at different controlled strain rates are necessary to obtain all the material parameters that appear in the theory. Examples concerning the modeling of tensile tests of a magnesium alloy at different strain rates are presented and analyzed. The results obtained show a very good agreement between experimental results and model prevision.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
