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| Plastic Poisson's ratio of closed-cell aluminum foams |
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Abstract Of all the parameters that characterizing CCAF(closed-cell aluminum foam) mechanical properties, the plastic Poisson's ratio is a important one. In this study, based on Kelvin model, the three-dimensional mesoscopic models of CCAFs are established. The plastic Poisson's ratio of different relative densities three-dimensional mesoscopic models of CCAFs under uniaxial quasi-static compression is numerical analyzed. The calculation results show that Poisson's ratio of CCAF changes like a inverse S shape with the increase of axial strain. The average plastic Poisson's ratio of CCAF has a close relationship with its relative density. When the relative density is less than 0.1, the average plastic Poisson's ratio can be ignored; when the relative density is bigger than 0.1, the average plastic Poisson's ratio shows a linear increase with the enhancement of the relative density and grows from 0.17 to 0.5.
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Received: 26 August 2014
Published: 28 June 2015
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2015, Vol. 36 
