A micromechanics-based strain gradient damage model for fracture prediction of brittle materials - Part II: Damage modeling and numerical simulations

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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)
刊名	International Journal of Solids and Structures
	2011
通讯作者邮箱	jia.li@univ-paris13.fr
卷号	48 期号:24 页码:3346-3358
关键词	Strain Gradient Theory Damage Fracture Microcracks Brittle Materials Size Effect Dynamic Fracture Crack-Growth Plasticity Stress Localization Formulation Criterion Toughness Continuum Elements
ISSN号	0020-7683
通讯作者	Li, J (reprint author), Univ Paris 13, LSPM, Inst Galilee, CNRS UPR 3407, 99 Ave Jean Baptiste Clement, F-93430 Villetaneuse, France
产权排序	[Li, J] Univ Paris 13, LSPM, Inst Galilee, CNRS UPR 3407, F-93430 Villetaneuse, France; [Song, F] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China; [Jiang, CP] Beijing Univ Aeronaut & Astronaut, Solid Mech Res Ctr, Beijing 100083, Peoples R China
合作状况	国际
中文摘要	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.
学科主题	Mechanics
分类号	一类/力学重要期刊
类目[WOS]	Mechanics
研究领域[WOS]	Mechanics
关键词[WOS]	DYNAMIC FRACTURE ; CRACK-GROWTH ; PLASTICITY ; STRESS ; LOCALIZATION ; FORMULATION ; CRITERION ; TOUGHNESS ; CONTINUUM ; ELEMENTS
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.ijsolstr.2011.08.003
语种	英语
WOS记录号	WOS:000296657200007
公开日期	2012-04-01
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/44890]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 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.(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.