Numerical study on dynamic compressive deformation and elasto-plastic wave propagation of foam materials

Finite element models of closed-cell foam structures were created using the three-dimensional Voronoi tessellation method coupled with the random sequential addition algorithm. The dynamic compressive deformation behaviors of the models were numerically studied using LS-DYNA code. The deformation mo...

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Bibliographic Details
Published inEPJ Web of Conferences Vol. 94; p. 4047
Main Authors Tanigaki, Kenichi, Idouji, Toru, Horikawa, Keitaro, Kobayashi, Hidetoshi, Ogawa, Kinya
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2015
Subjects
Deformation
Dependence
Elastic deformation
Elastic waves
Finite element method
Material properties
Mathematical models
Strain rate
Stress-strain relationships
Tessellation
Three dimensional models
Wave propagation
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Summary:Finite element models of closed-cell foam structures were created using the three-dimensional Voronoi tessellation method coupled with the random sequential addition algorithm. The dynamic compressive deformation behaviors of the models were numerically studied using LS-DYNA code. The deformation mode of the models changed gradually as the deformation rate increases. Also, the generation and the propagation of plastic wave was clearly observed with the rate of 100 m/s. The longitudinal elastic wave velocity showed a weak negative dependency on the deformation rate although the strain rate dependence of material properties was not considered. Furthermore, a prediction method for the dynamic stress state on the impact side based on the static stress-strain relationship was presented.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/20159404047