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Fracture and fatigue of discontinuously reinforced copper/tungsten compositesThe strength, toughness and resistance to cyclic crack propagation of composites consisting of copper reinforced with short tungsten wires of various lengths have been studied and the results compared with the behavior of continuously reinforced composites manufactured by the same method, i.e., by vacuum hot-pressing. It has been found that whereas the resistance to fatigue crack growth of continuously reinforced composites is very similar to that of continuous Al/stainless steel composites reported elsewhere, the addition of short fibers completely changes the mode of fracture, and no direct comparisons are possible. In effect, short fibers inhibit single crack growth by causing plastic flow to be distributed rather than localized, and although these composites are much less strong than continuous fiber composites, they nevertheless have much greater fatigue resistance.
Document ID
19750037576
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Harris, B.
(Sussex, University Brighton, United Kingdom)
Ramani, S. V.
(Sussex, University, Brighton, England; NASA, Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Composite Materials
Accession Number
75A21648
Distribution Limits
Public
Copyright
Other

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