Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1992
- Accession Number
- ADA257816
Entities
People
- David A. Pecknold
- Shahzad Rahman
Organizations
- University of Illinois Urbana–Champaign