Metallic foams have become widely available and have unique properties
that make them attractive for use in a variety of engineering applications. Due to
their complex structure, the behavior of foams under complex loading conditions
is a subject of continued research.
Digital volume correlation is a technique wherein full-field strains in three
dimensions can be measured from high resolution x-ray CT image data. This
technique was employed to measured strains in two commercially available
aluminum foams, one each of open and closed-cell morphology, under two
complex loading scenarios: rigid spherical indention, and uniaxial compression of
a sample with a central hole. In addition to comparing the behavior of the two
foams, results are also compared to strain fields analytically predicted by a third-party
constitutive model implemented in finite element analysis.
Under indention loading, the two examined foams showed a distinct
difference in deformation and strain field, however the foams behaved similarly
under uniaxial compression of rectangular samples with central holes. The
constitutive model was found to be unsuitable for modeling the experimentally
measured foams. / Graduation date: 2004
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/31802 |
| Date | 12 July 2003 |
| Creators | Rutschman, Scott A. |
| Contributors | Bay, Brian K. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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