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Creep Response of Sandwich Beams with a Metallic Foam Core
Author(s) -
Chen C.,
Fleck N.A.,
Ashby M.F.
Publication year - 2002
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/1527-2648(20021014)4:10<777::aid-adem777>3.0.co;2-a
Subject(s) - materials science , creep , metal foam , composite material , core (optical fiber) , metal , sandwich structured composite , structural engineering , metallurgy , porosity , engineering
The creep response of metallic foam sandwich beams in 3‐point bend is investigated numerically for the case of a metallic foam core and two steel faces. The face sheets are treated as elastic, while the foam core is modeled by a viscoplastic extension of the Deshpande‐Fleck yield surface. This power‐law creeping constitutive law has been implemented within the commercial finite element code ABAQUS. It is found that the beams creep by a variety of competing mechanisms, depending upon the choice of material properties and the geometric parameters. A failure map is constructed and effect of rate dependence on the load‐deflection curves is quantified, and compared against the available experimental data.