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Title:Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites
Author(s):Rahman, Shahzad
Doctoral Committee Chair(s):Pecknold, D.A.,
Department / Program:Civil Engineering
Discipline:Civil Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Applied Mechanics
Engineering, Civil
Engineering, Materials Science
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
Description:181 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1992.
Other Identifier(s):(UMI)AAI9305661
Date Available in IDEALS:2014-12-17
Date Deposited:1992

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