A Theoretical and Experimental Study on the Dynamic Constitutive Model of Aluminum Foams

Abstract:

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The phenomenological constitutive framework for compressible elasto-plastic solids presented by Chen and Lu [1] is extended to the dynamic cases by assuming that the material parameter curves in the stress potential depend also on the strain rate. To check the applicability of the extended model, three types of dynamic experiments, i.e., uniaxial compression, lateral-constrained compression and side-constrained compression tests, are conducted for an open-cell aluminum foam at different strain rates. The first two types of dynamic tests are used as characteristic tests to determine the material parameter curves at different strain rates which are then used to construct the stress potential function in the model. The results show that the stress-strain curves under side-constrained compression predicted by the model are in agreement with those obtained experimentally.

Info:

Periodical:

Materials Science Forum (Volumes 638-642)

Main Theme:

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

1878-1883

DOI:

10.4028/www.scientific.net/MSF.638-642.1878

Citation:

J. L. Yu et al., "A Theoretical and Experimental Study on the Dynamic Constitutive Model of Aluminum Foams ", Materials Science Forum, Vols. 638-642, pp. 1878-1883, 2010

Online since:

January 2010

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$35.00

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