Meccanica

, Volume 43, Issue 2, pp 185–199

Application of digital image correlation to the study of planar anisotropy of sheet metals at large strains

Article

DOI: 10.1007/s11012-008-9123-9

Cite this article as:
Rossi, M., Broggiato, G.B. & Papalini, S. Meccanica (2008) 43: 185. doi:10.1007/s11012-008-9123-9

Abstract

The aim of this work is to measure and model the planar anisotropy of thin steel sheets. The experimental data have been collected using the digital image correlation technique. This is a powerful tool to measure the strain field on differently shaped specimens subjected to large plastic deformations. In this manner, it is possible to observe the material behaviour under different stress-strain states, from small to large deformation conditions, on the entire specimen surface.

The experimental results on smooth and notched samples have been used to characterize the flow stress curve after necking and a nonassociated plastic flow rule is proposed to describe the anisotropic behaviour of the material. To compare the experimental data with the predictions of the adopted constitutive model, a novel method, based on the image correlation results, has been implemented.

Keywords

AnisotropyImage analysisNonassociated flow ruleSheet metals

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Dipartimento di MeccanicaUniversità Politecnica delle MarcheAnconaItaly
  2. 2.Dipartimento di Meccanica e AeronauticaUniversità di Roma “La Sapienza”RomaItaly