| 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
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| Source Publication | International Journal of Solids and Structures
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| 2011 | |
| Volume | 48Issue:24Pages:3346-3358 |
| ISSN | 0020-7683 |
| Abstract | In 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. |
| Keyword | Strain Gradient Theory Damage Fracture Microcracks Brittle Materials Size Effect Dynamic Fracture Crack-growth Plasticity Stress Localization Formulation Criterion Toughness Continuum Elements |
| Subject Area | Mechanics |
| DOI | 10.1016/j.ijsolstr.2011.08.003 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000296657200007 |
| WOS Keyword | DYNAMIC FRACTURE ; CRACK-GROWTH ; PLASTICITY ; STRESS ; LOCALIZATION ; FORMULATION ; CRITERION ; TOUGHNESS ; CONTINUUM ; ELEMENTS |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| Department | LNM生物材料微结构和力学性能 |
| Classification | 一类/力学重要期刊 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44890 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Li, 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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