A new idea of modeling shear band in metallic glass based on the concept of distributed dislocation

doi:10.1016/j.jnoncrysol.2021.121328

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	A new idea of modeling shear band in metallic glass based on the concept of distributed dislocation
	Li, Xiaotao 4; Qu, Ruitao 3; Rao W(饶威)2; Jiang, Xiaoyu 1
刊名	JOURNAL OF NON-CRYSTALLINE SOLIDS
	2022-02-01
卷号	577 页码:12
关键词	Shear band Metallic glasses Distributed dislocation Void Notch Finite element
ISSN号	0022-3093
DOI	10.1016/j.jnoncrysol.2021.121328
通讯作者	Li, Xiaotao(lixiaotao@cdu.edu.cn)
英文摘要	Shear bands are closely linked with the plasticity and fracture behaviors of metallic glasses (MGs). This work proposes a new idea to predict shear bands by continuously distributed dislocations. The dislocations are unreal and used to model the plastic deformation of shear band. The possible positions of shear band initiation are determined based on the elastic stress field, and the direction and length of shear band propagation are determined by the distributed dislocation technique. Finite element simulations based on constitutive model are carried out to compare with the theoretical modeling. Two examples are considered, i.e., shear bands near a void and a notch under tensile loading. The results show that the theoretically predicted shear band morphology is well consistent with the finite element simulations, which verifies the validation of using distributed dislocations to predict shear bands. This work provides a new way to model shear band, and it has potential applications in predicting shear band morphology and fracture behaviors in MGs.
分类号	二类/Q1
WOS关键词	STRESS-CONCENTRATION ; MECHANICAL-BEHAVIOR ; FRACTURE MECHANISMS ; MICRO-CRACK ; PLASTICITY ; INITIATION ; TOUGHNESS ; TENSION ; SIZE
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000779016100003
其他责任者	Li, Xiaotao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88811]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Southwest Jiaotong Univ, Sch Mech & Engn, Chengdu 610031, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China; 4.Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China;
推荐引用方式 GB/T 7714	Li, Xiaotao,Qu, Ruitao,Rao W,et al. A new idea of modeling shear band in metallic glass based on the concept of distributed dislocation[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2022,577:12.
APA	Li, Xiaotao,Qu, Ruitao,饶威,&Jiang, Xiaoyu.(2022).A new idea of modeling shear band in metallic glass based on the concept of distributed dislocation.JOURNAL OF NON-CRYSTALLINE SOLIDS,577,12.
MLA	Li, Xiaotao,et al."A new idea of modeling shear band in metallic glass based on the concept of distributed dislocation".JOURNAL OF NON-CRYSTALLINE SOLIDS 577(2022):12.