Non-uniform deformation after prestrain

• Type: Article in International Scientific Journal
• Date: 2000

Authors

José Valdemar Fernandes (Author) Other; Luis F. Menezes (Author) Other; Dulce M. Rodrigues (Author) Other; Bruno M. Chaparro (Author) Other; Manuel F. Vieira (Author) FEUP

Journal

Title: European Journal of Mechanics, A/Solids

Vol. 19 No. 2

Pages: 209-221

ISSN: 0997-7538

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 10 Citations

ISI Web of Science

Scopus - 10 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-001-0NH

DOI: 10.1016/s0997-7538(99)00146-1

Abstract (EN): The deformation behaviour of prestrained metal sheets is analysed in this work. The non-uniform deformation observed during reloading in tension was studied, by following deformation in different regions of the samples. It takes into account the presence of geometrical defects in the samples and explains the importance of mechanical behaviour. A simplified analysis was used, to model the behaviour in tension of a metallic specimen with geometrical imperfection. The Row behaviour is described using a Swift law equation, which includes strain-rate sensitivity. A modified law was used for prestrained materials and this incorporates the plastic prestrain value, adjusted to the path change. The model predicts imperfection growth kinetics with strain, and strain saturation in the homogeneous region, due to the onset of necking. (C) 2000 Editions scientifiques er medicales Elsevier SAS.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13