Plasticity of Fibrous Composites.
Final rept. 10 Oct 83-28 Feb 87,
RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CIVIL ENGINEERING
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The purpose of this research program was to establish experimentally verified constitutive relations for isothermal elastic-plastic behavior of metal matrix fibrous composite materials. The theoretical part of the work was concerned with development of new constitutive models of elastic-plastic fibrous composite materials. Our goal was to identify modeling techniques which would permit derivation of overall instantaneous mechanical properties of the aggregate in terms of microstructural geometry and the properties of the phases. Since most fibers remain elastic until failure, the inelastic overall strains are caused by plastic deformation of the matrix. Therefore, an important objective was to find connections between the elastic-plastic deformation of the neat matrix and the composite, and to develop models which would utilize such connections in predictions of the overall response. Also, among the possible approaches to the problem, it was necessary to identify those which would offer a guarantee of accuracy in applications involving incremental loading which could be verified experimentally.
- Laminates and Composite Materials