A modified Swift law for prestrained materials

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Fernandes, JV (Autor) Outra; Rodrigues, DM (Autor) Outra; Menezes, LF (Autor) Outra; Vieira, MF (Autor) FEUP

Revista

Título: International Journal of Plasticity

Vol. 14

Páginas: 537-550

ISSN: 0749-6419

Editora: Elsevier

Indexação

ISI Web of Knowledge - 32 Citações

ISI Web of Science

Scopus - 36 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-001-99Q

DOI: 10.1016/s0749-6419(98)00027-8

Abstract (EN): A modified Swift law to describe the evolution of the mechanical behaviour in reloading of prestrained materials is proposed in this work. This equation is deduced from the original Swift law by including a parameter that accounts for the effect of strain path change. This parameter depends on the value of the yield stress and the subsequent work-hardening behaviour in reloading. The new equation predicts well the general mechanical behaviour in the second path for cop per and steel. In particular, it predicts accurately the strain value for which necking occurs during reloading and fits experimental stress-strain curves well. The flow equation formulated remains sufficiently simple to be applied in finite element modelling of prestrained materials. However, since the parameter, which is needed for the modified Swift law, must be previously known, the strain path change itself cannot be part of the simulation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14