Micromechanical modeling of damage in periodic composites using strain gradient plasticity

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Micromechanical modeling of damage in periodic composites using strain gradient plasticity. / Azizi, Reza.

In: Engineering Fracture Mechanics, Vol. 92, 2012, p. 101-113.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Author

Azizi, Reza / Micromechanical modeling of damage in periodic composites using strain gradient plasticity.

In: Engineering Fracture Mechanics, Vol. 92, 2012, p. 101-113.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{77faaafaf79542d58220517004932a12,
title = "Micromechanical modeling of damage in periodic composites using strain gradient plasticity",
publisher = "Pergamon",
author = "Reza Azizi",
year = "2012",
doi = "10.1016/j.engfracmech.2012.04.033",
volume = "92",
pages = "101--113",
journal = "Engineering Fracture Mechanics",
issn = "0013-7944",

}

RIS

TY - JOUR

T1 - Micromechanical modeling of damage in periodic composites using strain gradient plasticity

A1 - Azizi,Reza

AU - Azizi,Reza

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - Damage evolution at the fiber matrix interface in Metal Matrix Composites (MMCs) is studied using strain gradient theory of plasticity. The study includes the rate independent formulation of energetic strain gradient plasticity for the matrix, purely elastic model for the fiber and cohesive zone model for the fiber–matrix interface. For the micro structure, free energy holds both elastic strains and plastic strain gradients. Due to the gradient theory, higher order boundary conditions must be considered. A unit cell with a circular elastic fiber is studied by the numerical finite element cell model under simple shear and transverse uniaxial tension using plane strain and periodic boundary conditions. The result of the overall response curve, effective plastic strain, effective stress and higher order stress distributions are shown. The effect of the material length scale, maximum stress carried by the interface and the work of separation per unit interface area on the composites overall behavior are investigated. The results are compared with those for strong interface.

AB - Damage evolution at the fiber matrix interface in Metal Matrix Composites (MMCs) is studied using strain gradient theory of plasticity. The study includes the rate independent formulation of energetic strain gradient plasticity for the matrix, purely elastic model for the fiber and cohesive zone model for the fiber–matrix interface. For the micro structure, free energy holds both elastic strains and plastic strain gradients. Due to the gradient theory, higher order boundary conditions must be considered. A unit cell with a circular elastic fiber is studied by the numerical finite element cell model under simple shear and transverse uniaxial tension using plane strain and periodic boundary conditions. The result of the overall response curve, effective plastic strain, effective stress and higher order stress distributions are shown. The effect of the material length scale, maximum stress carried by the interface and the work of separation per unit interface area on the composites overall behavior are investigated. The results are compared with those for strong interface.

KW - Damage

KW - Cohesive zone model

KW - Metal matrix composite

KW - Strain gradient plasticity

U2 - 10.1016/j.engfracmech.2012.04.033

DO - 10.1016/j.engfracmech.2012.04.033

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

VL - 92

SP - 101

EP - 113

ER -