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Finite Element Simulations of the Deformation of BCC Aggregates Using a Crystal Plasticity Model - Local Orientation Effects

Published online by Cambridge University Press:  10 February 2011

D. Arizmendi  and
J. L. Raphanel
D. Arizmendi
Affiliation:
LPMTM-CNRS, Université Paris Nord, 93430 Villetaneuse, France
J. L. Raphanel
Affiliation:
LMS-CNRS, Ecole polytechnique, 91128 Palaiseau Cedex, France. raphanel@lms.polytechnique.fr
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Abstract

One has simulated by a finite element computation, the tensile plastic deformation of bcc aggregates with the same initial crystallographic texture but a different spatial distribution of orientations. The computations show fairly large differences between the simulations in terms of axial strain fields: one aggregate presents an homogeneous field, while another one localizes the strain in a narrow band. This “macroscopic effect” is then analyzed at the smaller scale of the crystallite by comparing local re-orientations, glide activity and stress levels. The influence of neighboring grains and of the “local”texture is thus shown. This is an effect that polycrystalline models (Taylor or self-consistent models) cannot account for.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 27
Copyright
Copyright © Materials Research Society 2000

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References

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