A constitutive model for metallic glasses based on two-temperature nonequilibrium thermodynamics

doi:10.1016/j.ijplas.2022.103309

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 constitutive model for metallic glasses based on two-temperature nonequilibrium thermodynamics
	Rao, Wei 1,2,3; Chen, Yan 1,3; Dai, Lan-Hong 1,3
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2022-07-01
卷号	154 页码:29
关键词	Metallic glasses Constitutive model Nonequilibrium Configurational temperature Deformation mode Shear band
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2022.103309
通讯作者	Chen, Yan(chenyan@lnm.imech.ac.cn) ; Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要	We develop a new finite deformation constitutive model for metallic glass within the framework of irreversible nonequilibrium thermodynamics. To consider the intrinsically out-of-equilibrium characteristics of metallic glass, its total internal energy is divided into two weakly coupled configurational and kinetic subsystems, and configurational temperature coupling with configurational degrees of freedom is introduced as a thermodynamic state variable to characterize the evolution of the disordered structure. Furthermore, the classical shear transformation zone theory is extended by reasonably considering the reverse shear transformation as a form of the relaxation of the strain field, which is stored in the elastic matrix and produced by the constraint of the matrix on shear transformation. With the help of the finite element implementation for the new model, the effectiveness of the proposed model is validated by comparing the modeling stress- strain responses of the macroscopic deformations under different temperatures and strain rates with the experimental results, and the utility of the model for predicting the shear banding behavior of metallic glasses is examined as well. The results therefore show that the constructed constitutive model can not only effectively predict the deformations of metallic glass under different ambient temperatures and applied strain rates, but also reasonably explain the mechanisms of deformation mode evolution and shear band formation.
资助项目	NSFC[11790292] ; NSFC[12002342] ; NSFC[11972346] ; NSFC[11672299] ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; Strategic Priority Research Program[XDB22040302] ; Strategic Priority Research Program[XDB22040303] ; Key Research Program of Frontier Sciences[QYZDJSSW-JSC011] ; opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)[KFJJ18-14M]
WOS关键词	FRACTURE-BEHAVIOR ; DEFORMATION ; FAILURE ; ORIGIN ; SIMULATIONS ; TEMPERATURE ; CAVITATION ; TRANSITION ; PLASTICITY ; MECHANISM
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:000794343000001
资助机构	NSFC ; NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89375]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Chen, Yan; Dai, Lan-Hong
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 2.Beijing Univ Technol, Inst Mech, Fac Mat & Mfg, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Rao, Wei,Chen, Yan,Dai, Lan-Hong. A constitutive model for metallic glasses based on two-temperature nonequilibrium thermodynamics[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2022,154:29.
APA	Rao, Wei,Chen, Yan,&Dai, Lan-Hong.(2022).A constitutive model for metallic glasses based on two-temperature nonequilibrium thermodynamics.INTERNATIONAL JOURNAL OF PLASTICITY,154,29.
MLA	Rao, Wei,et al."A constitutive model for metallic glasses based on two-temperature nonequilibrium thermodynamics".INTERNATIONAL JOURNAL OF PLASTICITY 154(2022):29.