Fast Fourier Transform computations and build-up of plastic deformation in 2D, elastic-perfectly plastic, pixelwise disordered porous media - Archive ouverte HAL Access content directly
Conference Papers Year : 2008

Fast Fourier Transform computations and build-up of plastic deformation in 2D, elastic-perfectly plastic, pixelwise disordered porous media

(1, 2) , (1)
1
2

Abstract

Stress and strain fields in a two-dimensional pixelwise disordered system are computed by a Fast Fourier Transform method. The system, a model for a ductile damaged medium, consists of an elastic-perfectly matrix containing void pixels. Its behavior is investigated under equibiaxial or shear loading. We monitor the evolution with loading of plastically deformed zones, and we exhibit a nucleation / growth / coalescence scenario of the latter. Identification of plastic ''clusters'' is eased by using a discrete Green function implementing equilibrium and continuity at the level of one pixel. Observed morphological regimes are put into correspondence with some features of the macroscopic stress / strain curves.

Dates and versions

cea-00412544 , version 1 (02-09-2009)

Identifiers

Cite

François Willot, Yves-Patrick Pellegrini. Fast Fourier Transform computations and build-up of plastic deformation in 2D, elastic-perfectly plastic, pixelwise disordered porous media. 11th International Symposium on Continuum Models and Discrete Systems CMDS 11, Jul 2007, Paris, France. pp.443-449. ⟨cea-00412544⟩
169 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More