Artículo
Compaction and plasticity in nanofoams induced by shock waves: A molecular dynamics study
Gunkelmann, Nina; Rosandi, Yudi; Ruestes, Carlos Javier
; Bringa, Eduardo Marcial
; Urbassek, Herbert M.
Fecha de publicación:
06/2016
Editorial:
Elsevier Science
Revista:
Computational Materials Science
ISSN:
0927-0256
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Shock waves are produced in Al nanofoams by a piston moving with velocity Up. They induce plastic activity in the ligaments before eventually the foam structure is crushed and a compact material results. We demonstrate dislocation formation in the foams and correlate it with the velocity and stress profiles in the shock wave. The profiles exhibit a 3-wave structure indicating 3 wave regimes: elastic precursor, plastic activity in the ligaments, and foam crushing. The shock wave velocity V follows well macroscopic predictions, V ∞ Up. The length of the non-collapsed part of the foam is well described by an analytical compaction model.
Palabras clave:
COMPACTION
,
FOAM
,
MOLECULAR DYNAMICS
,
SHOCK WAVE
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Identificadores
Colecciones
Articulos(CCT - MENDOZA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MENDOZA
Citación
Gunkelmann, Nina; Rosandi, Yudi; Ruestes, Carlos Javier; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Compaction and plasticity in nanofoams induced by shock waves: A molecular dynamics study; Elsevier Science; Computational Materials Science; 119; 6-2016; 27-32
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