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Modelling of plasticity and damage in a polycrystalline microstructure

Cannmo, Patrik; Runesson, Kenneth and Ristinmaa, Matti LU (1995) In International Journal of Plasticity 11(8). p.949-970
Abstract
The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory based on damage development coupled to inelastic slip and dilatation is developed. The theory uses the interface width as a constitutive parameter, which regularizes the theory of LEMAITRE [1992], that is restricted to perfect bond between grain and matrix. In a series of FE-analyses parameter variations were performed: The unit cell size (as... (More)
The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory based on damage development coupled to inelastic slip and dilatation is developed. The theory uses the interface width as a constitutive parameter, which regularizes the theory of LEMAITRE [1992], that is restricted to perfect bond between grain and matrix. In a series of FE-analyses parameter variations were performed: The unit cell size (as compared to the average grain diameter), the grain-matrix area ratio, the interface width and constitutive parameters. It appears that the composite behavior can be designed as brittle or ductile solely depending on the strength and rate of damage development in the interfaces. A localization band was detected, and its orientation is in the range that is predicted within continuum theory. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
grain boundary, Plasticity, polycrystalline material
in
International Journal of Plasticity
volume
11
issue
8
pages
949 - 970
publisher
Elsevier
external identifiers
  • Scopus:0029480038
ISSN
0749-6419
DOI
10.1016/S0749-6419(95)00038-0
language
English
LU publication?
yes
id
6bd83c63-dc09-457a-9536-9439a89fab72 (old id 2223680)
date added to LUP
2011-12-06 13:24:47
date last changed
2016-04-16 11:46:57
@misc{6bd83c63-dc09-457a-9536-9439a89fab72,
  abstract     = {The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory based on damage development coupled to inelastic slip and dilatation is developed. The theory uses the interface width as a constitutive parameter, which regularizes the theory of LEMAITRE [1992], that is restricted to perfect bond between grain and matrix. In a series of FE-analyses parameter variations were performed: The unit cell size (as compared to the average grain diameter), the grain-matrix area ratio, the interface width and constitutive parameters. It appears that the composite behavior can be designed as brittle or ductile solely depending on the strength and rate of damage development in the interfaces. A localization band was detected, and its orientation is in the range that is predicted within continuum theory.},
  author       = {Cannmo, Patrik and Runesson, Kenneth and Ristinmaa, Matti},
  issn         = {0749-6419},
  keyword      = {grain boundary,Plasticity,polycrystalline material},
  language     = {eng},
  number       = {8},
  pages        = {949--970},
  publisher    = {ARRAY(0x760eba0)},
  series       = {International Journal of Plasticity},
  title        = {Modelling of plasticity and damage in a polycrystalline microstructure},
  url          = {http://dx.doi.org/10.1016/S0749-6419(95)00038-0},
  volume       = {11},
  year         = {1995},
}