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A micromechanics-based strain gradient damage model for fracture prediction of brittle materials - Part II: Damage modeling and numerical simulations
Li J; Pham T; Abdelmoula R; Song F(宋凡); Jiang CP(蒋持平); Li, J (reprint author), Univ Paris 13, LSPM, Inst Galilee, CNRS UPR 3407, 99 Ave Jean Baptiste Clement, F-93430 Villetaneuse, France
Source PublicationInternational Journal of Solids and Structures
2011
Volume48Issue:24Pages:3346-3358
ISSN0020-7683
AbstractIn this paper, we established a strain-gradient damage model based on microcrack analysis for brittle materials. In order to construct a damage-evolution law including the strain-gradient effect, we proposed a resistance curve for microcrack growth before damage localization. By introducing this resistance curve into the strain-gradient constitutive law established in the first part of this work (Li, 2011), we obtained an energy potential that is capable to describe the evolution of damage during the loading. This damage model was furthermore implemented into a finite element code. By using this numerical tool, we carried out detailed numerical simulations on different specimens in order to assess the fracture process in brittle materials. The numerical results were compared with previous experimental results. From these studies, we can conclude that the strain gradient plays an important role in predicting fractures due to singular or non-singular stress concentrations and in assessing the size effect observed in experimental studies. Moreover, the self-regularization characteristic of the present damage model makes the numerical simulations insensitive to finite-element meshing. We believe that it can be utilized in fracture predictions for brittle or quasi-brittle materials in engineering applications. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordStrain Gradient Theory Damage Fracture Microcracks Brittle Materials Size Effect Dynamic Fracture Crack-growth Plasticity Stress Localization Formulation Criterion Toughness Continuum Elements
Subject AreaMechanics
DOI10.1016/j.ijsolstr.2011.08.003
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000296657200007
WOS KeywordDYNAMIC FRACTURE ; CRACK-GROWTH ; PLASTICITY ; STRESS ; LOCALIZATION ; FORMULATION ; CRITERION ; TOUGHNESS ; CONTINUUM ; ELEMENTS
WOS Research AreaMechanics
WOS SubjectMechanics
DepartmentLNM生物材料微结构和力学性能
Classification一类/力学重要期刊
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44890
Collection非线性力学国家重点实验室
Corresponding AuthorLi, J (reprint author), Univ Paris 13, LSPM, Inst Galilee, CNRS UPR 3407, 99 Ave Jean Baptiste Clement, F-93430 Villetaneuse, France
Recommended Citation
GB/T 7714
Li J,Pham T,Abdelmoula R,et al. A micromechanics-based strain gradient damage model for fracture prediction of brittle materials - Part II: Damage modeling and numerical simulations[J]. International Journal of Solids and Structures,2011,48(24):3346-3358.
APA Li J,Pham T,Abdelmoula R,宋凡,蒋持平,&Li, J .(2011).A micromechanics-based strain gradient damage model for fracture prediction of brittle materials - Part II: Damage modeling and numerical simulations.International Journal of Solids and Structures,48(24),3346-3358.
MLA Li J,et al."A micromechanics-based strain gradient damage model for fracture prediction of brittle materials - Part II: Damage modeling and numerical simulations".International Journal of Solids and Structures 48.24(2011):3346-3358.
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