|The coupling effect of size and damage in micro-scale metallic materials|
|Ban HX; Yao Y(姚寅); Chen SH(陈少华); Fang DN; Chen, SH (reprint author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.; Chen, SH (reprint author), Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China.
|Source Publication||INTERNATIONAL JOURNAL OF PLASTICITY
|Abstract||In order to characterize the deformation behavior accompanying damage of microstructures in micro-scale metallic materials a new theoretical model is developed based on a low order strain gradient plasticity theory. Not only the size effect induced by strain gradient plasticity but also the one of microstructure damage induced by deformation is considered. The feature of the new theory includes two aspects: the strain gradient is taken as an internal variable to affect the tangential hardening modulus without the introduction of high-order stress or high-order boundary condition; both the elastic modulus and the involved intrinsic length are influenced by the microstructural damage. Two commonly used samples with size effect in micro-scales i.e. the thinwire torsion and the ultra-thin beam bending are re-analyzed with the new model. It is found that stiffness of the micro-scale material is gradually reduced along with the increasing deformation and the theoretical prediction is consistent well with the existing experimental data. All the results demonstrate that the present theory should be a promising way for predicting the mechanical behavior of a more complex system for example the micro-particle reinforced metal matrix composite and the recent-hot-studied nano-crystallized gradient materials. (C) 2017 Elsevier Ltd. All rights reserved.|
Intrinsic Length Scale
|WOS Keyword||STRAIN GRADIENT PLASTICITY
; DISCRETE DISLOCATION DYNAMICS
; CONTENT B4C/AL COMPOSITES
; CRYSTAL PLASTICITY
; MATRIX COMPOSITES
; LENGTH SCALE
; DEPENDENT DEFORMATION
; DUCTILE FRACTURE
|WOS Research Area||Engineering
; Materials Science
|WOS Subject||Engineering, Mechanical
; Materials Science, Multidisciplinary
; BIT Creative Research Plan
|Corresponding Author||Chen, SH (reprint author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.; Chen, SH (reprint author), Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China.|
Ban HX,Yao Y,Chen SH,et al. The coupling effect of size and damage in micro-scale metallic materials[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2017,95:251-263.
Ban HX,姚寅,陈少华,Fang DN,Chen, SH ,&Chen, SH .(2017).The coupling effect of size and damage in micro-scale metallic materials.INTERNATIONAL JOURNAL OF PLASTICITY,95,251-263.
Ban HX,et al."The coupling effect of size and damage in micro-scale metallic materials".INTERNATIONAL JOURNAL OF PLASTICITY 95(2017):251-263.
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