PLASTIC DEFORMATION AND FAILURE OF SILVER-STEEL FILAMENTARY COMPOSITE MATERIALS,
Abstract
Continuous 7 and 19 filament close-packed silver-steel filamentary composite materials were tested in tension. The specimens were prepared from silver plated piano wires that were inserted in a silver tube, compacted by wire drawing, and sintered in the solid state. The early stages of the composite plastic stress strain curves followed a linear mixture rule constructed from the properties of the individual components. The composite elongations at failure, however, were about twice the elongations observed when the filaments were tested alone. The composite ultimate tensile strengths were also above a mixture rule constructed from the ultimate tensile stress of the filaments and the flow stress of the matrix at a strain equal to the elongation at failure of the filaments. These increases in elongation and ultimate tensile strength are explained in terms of a lateral restraint to necking in the filaments are sufficently widely spaced, composite failure occurred by the consecutive fracture of the filaments. However, when the filaments were extremely closely spaced, a composite instability preceeded fracture. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0426348
Entities
People
- Henry R. Piehler
Organizations
- Massachusetts Institute of Technology