Quantitative comparison of full field strains experimentally measured and analytically predicted for aluminum foams Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/wm117r27j

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  • 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.
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