Interfacial micro-level stress transfer in macroscopic thermo-viscoelastic creep of unidirectional composites

Peter W. Chung, Kumar K Tamma, Raju R. Namburu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Stress transfer across the fiber-matrix interface is studied numerically via the Finite Element Method and the asymptotic expansion homogenization (AEH) approach. The thermo-viscoelastic equations are solved accounting for thermal strains. The external loads in the problem are constant over time and are applied on the macro-level creep specimen. The subsequent micro-stresses are computed via a localization procedure, or reverse-homogenization. The micro-level stress transfer across the matrix/fiber interface is accounted for by a layer of thin elements along the boundary that separates the two phases. The material properties of the interface elements are assumed always less than or equal to the matrix properties. This makes the microstructure a three phase composite. Verifications for elastic properties and illustrative examples emphasizing interface stress transfer issues are presented.

Original languageEnglish (US)
Title of host publication41st Structures, Structural Dynamics, and Materials Conference and Exhibit
StatePublished - Dec 1 2000
Event41st Structures, Structural Dynamics, and Materials Conference and Exhibit 2000 - Atlanta, GA, United States
Duration: Apr 3 2000Apr 6 2000

Other

Other41st Structures, Structural Dynamics, and Materials Conference and Exhibit 2000
CountryUnited States
CityAtlanta, GA
Period4/3/004/6/00

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Chung, P. W., Tamma, K. K., & Namburu, R. R. (2000). Interfacial micro-level stress transfer in macroscopic thermo-viscoelastic creep of unidirectional composites. In 41st Structures, Structural Dynamics, and Materials Conference and Exhibit