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Material model of metallic cellular solids

✍ Scribed by B. Hučko; L. Faria

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
699 KB
Volume
62
Category
Article
ISSN
0045-7949

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✦ Synopsis

In this paper we deal with a continuum model of a man-made cellular material. A simple visco-elastic model with softening is used. The basic features of behaviour of cellular material: linear-elastic region, plateau and locking are presented. The locking function is assumed in terms of volume changes. The stresses are functions of density updating during deformation process. This model has been coded into ABAQUS through user's subroutine and tested on examples with the strain localization and with the densification (locking).

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The force to deform cellular material can be described as a function of the deformation expanded in a Taylor's series. The resultant three-term cubic model is used to identify the three characteristic sections of the force}deformation curve related to the expected cellular response. The elastic, vis