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A constitutive model for amorphous solids considering intrinsic entangling of shear and dilatation, with application to studying shear-banding

文献类型：期刊论文

作者Rao, W3; Chen Y(陈艳)1,2; Dai LH(戴兰宏)1,2; Jiang MQ(蒋敏强)1,2
刊名JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
出版日期2025-03-01
卷号196页码:23
关键词Amorphous solids Constitutive model Nonequilibrium thermodynamics Entangling of shear and dilatation Shear banding
ISSN号0022-5096
DOI10.1016/j.jmps.2024.106002
通讯作者Rao, W.(rw@bjut.edu.cn) ; Jiang, M. Q.(mqjiang@imech.ac.cn)
英文摘要In amorphous solids, shear transformations, as elementary rearrangement events operating in local regions, are intrinsically entangled with dilatation deformation, which results in the physical process of the shear band being complex. To capture such entanglement, we propose a finite- deformation continuum framework for amorphous solids by incorporating nonequilibrium thermodynamics. Within this framework, we develop a constitutive model where the thermodynamic glass is divided into the kinetic and configurational subsystems. In the model, the dilatation is attributed to an athermal expansion of configuration. As a result, the effect of shear transformation on dilatation can be considered by generating plastic cold work to change the freedom degrees of the configurational subsystem. The effect of dilatation on shear transformation can be realized through the enthalpy change of the configurational subsystem that gives rise to physical aging. Based on the proposed model, we discuss the entangling mechanism of shear and dilatation, and predict the shear-banding behaviors of metallic glasses during tensile and compressive deformations at room temperature. We reveal that due to the shear-dilatation entanglement, the elastic deformations significantly influence the evolution of configurational temperature, which plays a pivotal role in controlling the degree of strain softening and the shear-banding mode.
分类号一类/力学重要期刊
WOS关键词BULK-METALLIC GLASSES ; PLASTIC-DEFORMATION ; FREE-VOLUME ; TRANSFORMATION ; DYNAMICS ; MECHANISM ; BEHAVIOR ; ORIGIN ; FLOW ; SIMULATIONS
资助项目National Outstanding Youth Science Fund Project ; NSFC[12322214] ; Major International Joint Research Project[W2411003] ; CAS Project for Young Scientists in Basic Research[YSBR-096] ; Strategic Priority Research Program of Chinese Academy of Sciences ; Basic Science Center for Multiscale Problems in Nonlinear Mechanics of NSFC ; [12002342] ; [12125206] ; [XDB0620301] ; [11988102]
WOS研究方向Materials Science ; Mechanics ; Physics
语种英语
WOS记录号WOS:001389483100001
资助机构National Outstanding Youth Science Fund Project ; NSFC ; Major International Joint Research Project ; CAS Project for Young Scientists in Basic Research ; Strategic Priority Research Program of Chinese Academy of Sciences ; Basic Science Center for Multiscale Problems in Nonlinear Mechanics of NSFC
其他责任者Rao, W. ; Jiang, M. Q.
源URL[http://dspace.imech.ac.cn/handle/311007/98080]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Beijing Univ Technol, Inst Mech, Sch Math Stat & Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Rao, W,Chen Y,Dai LH,et al. A constitutive model for amorphous solids considering intrinsic entangling of shear and dilatation, with application to studying shear-banding[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2025,196:23.
APA Rao, W,陈艳,戴兰宏,&蒋敏强.(2025).A constitutive model for amorphous solids considering intrinsic entangling of shear and dilatation, with application to studying shear-banding.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,196,23.
MLA Rao, W,et al."A constitutive model for amorphous solids considering intrinsic entangling of shear and dilatation, with application to studying shear-banding".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 196(2025):23.

入库方式： OAI收割

来源：力学研究所

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