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A Representative Volume Element Based Micromechanical Constitutive Modeling of Woven Composites

Published online by Cambridge University Press:  01 February 2011

A.M. Rajendran ,
R. Valisetty ,
R. Namburu  and
Y.A. Bahei-El-Din
A.M. Rajendran
Affiliation:
U.S. Army Research Office, Research Triangle Park, NC 27709-2211, U.S.A.
R. Valisetty
Affiliation:
U.S. Army Research Laboratory Aberdeen Proving Ground, MD 21005-5067, U.S.A.
R. Namburu
Affiliation:
U.S. Army Research Laboratory Aberdeen Proving Ground, MD 21005-5067, U.S.A.
Y.A. Bahei-El-Din
Affiliation:
Department of Mechanical, Aerospace & Nuclear EngineeringRensselaer Polytechnic InstituteTroy, NY 12180-3590, U.S.A.
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Abstract

This paper presents a computationally intensive, multiscale constitutive model for 3D-woven composites exhibiting progressive damage. The model is based on analysis of a representative volume element (RVE), which is derived from the actual woven architecture. The link between the local phenomena and the overall response is described by a transformation field analysis (TFA) in terms of stress concentration factors and influence function, which reflect the microgeometry and properties of the constituents. In this way, the local geometric and physical effects are represented in the model with substantial details so that the local stress and strain fields and the overall response could be accurately computed. It seems to be a reliable approach to capture the effects of the material heterogeneity and damage on wave dispersion and attenuation in shockwave problems. The RVE/TFA-based constitutive model was implemented into the DYNA finite element code, and simulations of shock and impact problems were performed to describe the various damage mechanisms. The TFA model is computationally intensive and requires massively parallel computing. This paper examines the effects of the local field representation, and the in situ damage phenomena on the overall response.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 882: Symposium EE – Linking Length Scales in the Mechanical Behavior of Materials , 2005 , EE7.6
Copyright
Copyright © Materials Research Society 2005

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References

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