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On a Proper Account of First‐ and Second‐Order Size Effects in Crystal Plasticity
Author(s) -
Geers Marc G. D.,
Peerlings Ron H. J.,
Hoefnagels Johan P. M.,
Kasyanyuk Yuriy
Publication year - 2009
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/adem.200800287
Subject(s) - granularity , plasticity , crystal plasticity , materials science , statistical physics , dislocation , grain size , mechanics , computer science , physics , metallurgy , composite material , operating system
This paper addresses engineering size effects in miniaturized metallic components. First, the critical role of processing induced size effects is emphasized. Next, the need for a rigorous strain gradient enrichment in crystal plasticity modelling is advocated, directly resulting from the coarse graining of discrete dislocation interactions. The physical origin of the energetic enrichment is discussed and its deterministic derivation is briefly confronted with analogous statistical mechanics results.