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Computational Modeling of Damage Based on Microcrack Kinking

Dobrovat, A. M.; Dascalu, C. and Hall, Stephen LU (2015) In International Journal for Multiscale Computational Engineering 13(3). p.201-217
Abstract
The paper presents numerical results for a two-scale damage model accounting for mixed-mode propagation of micro-cracks. A time-dependent propagation criterion is assumed for microcrack growth and a kinking direction criterion based on the maximum of the energy-release rate is used. The macroscopic damage evolution laws are obtained by homogenization based on asymptotic developments. A numerical procedure based on finite elements is developed for the two-scale model and simulations illustrating the structural response are presented. A priori microscopic computations increase the efficiency of the computational model at the scale of macroscopic structures. The resulting homogenized behavior involves softening and localization of damage.... (More)
The paper presents numerical results for a two-scale damage model accounting for mixed-mode propagation of micro-cracks. A time-dependent propagation criterion is assumed for microcrack growth and a kinking direction criterion based on the maximum of the energy-release rate is used. The macroscopic damage evolution laws are obtained by homogenization based on asymptotic developments. A numerical procedure based on finite elements is developed for the two-scale model and simulations illustrating the structural response are presented. A priori microscopic computations increase the efficiency of the computational model at the scale of macroscopic structures. The resulting homogenized behavior involves softening and localization of damage. Direct links between macroscopic damage evolution and microscopic propagation of micro-cracks are established within the two-scale model. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
microcracks, mixed mode propagation, subcritical growth, homogenization, asymptotic developments, time-dependent damage model, finite element, simulations, mesh independency
in
International Journal for Multiscale Computational Engineering
volume
13
issue
3
pages
201 - 217
publisher
Begell House
external identifiers
  • wos:000355982800002
  • scopus:84932124439
ISSN
1543-1649
DOI
10.1615/IntJMultCompEng.2015011883
language
English
LU publication?
yes
id
ec184c5a-336b-4b6e-82c7-4625a18572c6 (old id 7606139)
date added to LUP
2015-07-22 08:50:36
date last changed
2017-10-01 03:12:00
@article{ec184c5a-336b-4b6e-82c7-4625a18572c6,
  abstract     = {The paper presents numerical results for a two-scale damage model accounting for mixed-mode propagation of micro-cracks. A time-dependent propagation criterion is assumed for microcrack growth and a kinking direction criterion based on the maximum of the energy-release rate is used. The macroscopic damage evolution laws are obtained by homogenization based on asymptotic developments. A numerical procedure based on finite elements is developed for the two-scale model and simulations illustrating the structural response are presented. A priori microscopic computations increase the efficiency of the computational model at the scale of macroscopic structures. The resulting homogenized behavior involves softening and localization of damage. Direct links between macroscopic damage evolution and microscopic propagation of micro-cracks are established within the two-scale model.},
  author       = {Dobrovat, A. M. and Dascalu, C. and Hall, Stephen},
  issn         = {1543-1649},
  keyword      = {microcracks,mixed mode propagation,subcritical growth,homogenization,asymptotic developments,time-dependent damage model,finite element,simulations,mesh independency},
  language     = {eng},
  number       = {3},
  pages        = {201--217},
  publisher    = {Begell House},
  series       = {International Journal for Multiscale Computational Engineering},
  title        = {Computational Modeling of Damage Based on Microcrack Kinking},
  url          = {http://dx.doi.org/10.1615/IntJMultCompEng.2015011883},
  volume       = {13},
  year         = {2015},
}