Micromechanical modeling of unidirectional continuous signma fiber

W Ding, Paul Bowen

Research output: Contribution to journalArticle

2 Citations (Scopus)


A micromodeling analysis of unidirectionally reinforced Ti-6-4/SM1140+ composites subjected to transverse tensile loading has been performed using the finite-element method (FEM). The composite is assumed to be infinite and regular, with either hexagonal or rectangular arrays of fibers in an elastic-plastic matrix. Unit cells of these arrays are applied in this modeling analysis. Factors affecting transverse properties of the composites, such as thermal residual stresses caused by cooling from the composite processing temperature, fiber-matrix interface conditions, fiber volume fraction, fiber spacing, fiber packing, and test temperature are discussed. Predictions of stress-strain curves are compared with experimental results. A hexagonal fiber-packing model with a weak fiber-matrix interfacial strength predicts the transverse tensile behavior of the composite Ti-6-4/SM1140+ most accurately.
Original languageEnglish
Pages (from-to)3045-3053
Number of pages9
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Publication statusPublished - 1 Jan 2002


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