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Holographic study of non-affine deformation in copper foam with a negative Poisson's ratio of -0.8While conventional foams have positive Poisson's ratios (become smaller in cross-section when stretched and larger when compressed), foam materials have recently been defined which possess 'reentrant' cellular architectures; in these, inwardly-protruding cell ribs are responsible for negative Poisson's ratio behavior, yielding greater resilience than conventional foams. Double-exposure holographic interferometry is presently used to examine the microdeformation of a reentrant copper foam. Attention is given to the nonaffine (inhomogeneous) deformation of this foam.
Document ID
19930061963
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chen, C. P.
(NASA Langley Research Center Hampton, VA, United States)
Lakes, R. S.
(Iowa Univ. Iowa City, United States)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: Scripta Metallurgica et Materialia
Volume: 29
Issue: 3
ISSN: 0956-716X
Subject Category
Metallic Materials
Accession Number
93A45960
Funding Number(s)
CONTRACT_GRANT: NAS1-18889
Distribution Limits
Public
Copyright
Other

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