Our opinion is that the modelling of different phenomena such as bulk growth, phase transitions, plastic or visco-plastic deformations, could be framed under the unifying notion of “material remodelling”, or growth. Key point is to introduce distinct descriptions of the actual and the relaxed configurations of a body, both capable of time evolution according to their own balance laws. The ordinary balance law of continuum mechanics governs the evolution of the actual configuration, while the evolution law of the relaxed one, accounting for the material remodelling, is obtained as a constitutively augmented new balance; standard forces goes along with accretive forces, and the two balance laws results naturally coupled via an Eshelbylike term. Here, we present a simple model for a one-dimensional body capable of material remodelling; this model describes the creep phenomenon in uni-axial stress tests in terms of passive growth—a remodelling whose balance law has no source term.
Creep as Passive Growth / A., Dicarlo; Nardinocchi, Paola; L., Teresi. - STAMPA. - 10:(2004), pp. 512-515. (Intervento presentato al convegno Eight PanAmerican Congresso of Applied Mechanics tenutosi a Havana, Cuba nel Gennaio 2004).
Creep as Passive Growth
NARDINOCCHI, Paola;
2004
Abstract
Our opinion is that the modelling of different phenomena such as bulk growth, phase transitions, plastic or visco-plastic deformations, could be framed under the unifying notion of “material remodelling”, or growth. Key point is to introduce distinct descriptions of the actual and the relaxed configurations of a body, both capable of time evolution according to their own balance laws. The ordinary balance law of continuum mechanics governs the evolution of the actual configuration, while the evolution law of the relaxed one, accounting for the material remodelling, is obtained as a constitutively augmented new balance; standard forces goes along with accretive forces, and the two balance laws results naturally coupled via an Eshelbylike term. Here, we present a simple model for a one-dimensional body capable of material remodelling; this model describes the creep phenomenon in uni-axial stress tests in terms of passive growth—a remodelling whose balance law has no source term.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
