Accession Number:

ADA257816

Title:

Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites

Descriptive Note:

Structural research series no. 572, 1 Jan 1991-31 Aug 1992,

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF CIVIL ENGINEERING

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

179.0

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.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE