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Title:Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites
Author(s):Rahman, S.; Pecknold, D.A.
Subject(s):Composites -- Laminated
Nonlinear material modeling
Abstract:A procedure for three-dimensional nonlinear material modelling of fiber-reinforced laminated composites is presented. The material modelling procedure has a two-level hierarchical structure. At the bottom level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a sublaminate, and delivers the effective stress-strain response of the sublaminate. Local stresses and strains in a lamina or in fiber and matrix phases can be recovered from the effective values at any stage. The material modelling procedure enables the use of standard displacement-based finite elements. The matrix material is characterized using nonlinear-elastic Ramberg-Osgood relations. Micromechanical failure criteria are used for determining various modes of failure, including compression kink-banding. The accuracy of the micromechanical model is demonstrated by comparing its predictions with results from other micromechanical models and experimental data. Examples are also presented for laminated structures; the results are in good agreement with analytical and experimental results available in the literature.
Issue Date:1992-09
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-572
Genre:Technical Report
Sponsor:Center for Composite Materials Research Grant ONR N00014-86-K-0799
Industrial Affiliates Program
Date Available in IDEALS:2009-11-09
Identifier in Online Catalog:3502418

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