THE EFFECT OF STRAIN PATH CHANGE ON THE MECHANICAL-BEHAVIOR OF COPPER SHEETS

• Tipo: Artigo em Revista Científica Internacional
• Data: 1990

Autores

VIEIRA, MF (Autor) FEUP; SCHMITT, JH (Autor) Outra; GRACIO, JJ (Autor) Outra; FERNANDES, JV (Autor) Outra

Revista

Título: Journal of Materials Processing Technology

Vol. 24

Páginas: 313-322

ISSN: 0924-0136

Editora: Elsevier

Indexação

ISI Web of Knowledge - 18 Citações

Scopus - 18 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

Outras Informações

ID Authenticus: P-001-RBZ

DOI: 10.1016/0924-0136(90)90192-w

Abstract (EN): Oxygen-free high purity copper sheet (99.95% Cu) has been prestrained in tension, rolling, shear and equibiaxial stretching. Effects of the prestrain value, nature of prestrain and path change on the total homogeneous deformation were evaluated by subsequently performing uniaxial tensile tests with the axis parallel to a reference direction on the sheet. After a critical prestrain value, the path change measured by a parameter alpha influences the residual homogeneous deformation during the subsequent path. A phenomenological model, based on the estimation of the reloading limit stress with respect to the reference stress corresponding to the prestrain amount, was proposed to predict the occurrence of the early plastic instability during the subsequent path. According to the model, the dependence of the residual uniform strain on the amplitude of the strain path change is only due to the relation existing between the reloading stress and the parameter alpha.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10