Published: Jan 1963
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Small-diameter (0.003 in.) steel wire with various types of metallic surfaces and exhibiting a tensile strength approximating 600,000 psi is now available in commercial quantities. The material can be handled conveniently and without damage, and can be economically wound into a variety of container shapes. Exploring such applications the following combinations have been fabricated: wire-epoxy, wire-polyethylene, wire-polypropylene, and glass fibers — epoxy. (The glass fiber construction serves as a basis for comparison.) Single reinforcement resin specimens were used to perfect surface treatments which gave greatest adhesion; plate laminates were then prepared to provide flat test specimens for tensile and flexural measurement. The Naval Ordnance Laboratory (NOL) split ring test has also been used as well as internal pressurization of helically wound thin-walled tubes. Progress to date indicates that good utilization of the inherent wire strength is possible in filament-wound constructions.
McGarry, F. J.
Associate Professor of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Mass
Marshall, D. W.
Research Engineer, Massachusetts Institute of Technology, Cambridge, Mass