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

• Type: Article in International Scientific Journal
• Date: 1990

Authors

VIEIRA, MF (Author) FEUP; SCHMITT, JH (Author) Other; GRACIO, JJ (Author) Other; FERNANDES, JV (Author) Other

Journal

Title: Journal of Materials Processing Technology

Vol. 24

Pages: 313-322

ISSN: 0924-0136

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 17 Citations

Scientific classification

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10