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Inertia effect of deformation in amorphous solids: A dynamic mesoscale model

文献类型：期刊论文

作者Duan XM(段鑫淼); Yu L(喻立); Cai SL(蔡松林); Dai LH(戴兰宏); Jiang MQ(蒋敏强)
刊名JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
出版日期2024-12
卷号193页码:105917
关键词Amorphous solids Dynamic deformation Inertia effect Shear transformation Mesoscale model
ISSN号0022-5096
DOI10.1016/j.jmps.2024.105917
英文摘要Shear transformation (ST), as the fundamental event of plastic deformation of amorphous solids, is commonly considered as transient in time and thus assumed to be an equilibrium process without inertia. Such an approximation however poses a major challenge when the deformation becomes non-equilibrium, e.g., under the dynamic and even shock loadings. To overcome the challenge, this paper proposes a dynamic mesoscale model for amorphous solids that connects microscopically inertial STs with macroscopically elastoplastic deformation. By defining two dimensionless parameters: strain increment and intrinsic Deborah number, the model predicts a phase diagram for describing the inertia effect on deformation of amorphous solids. It is found that with increasing strain rate or decreasing ST activation time, the significant inertia effect facilitates the activation and interaction of STs, resulting in the earlier yield of plasticity and lower steady-state flow stress. We also observe that the externally-applied shock wave can directly drive the activation of STs far below the global yield and then propagation along the wave-front. These behaviors are very different from shear banding in the quasi-static treatment without considering the inertia effect of STs. The present study highlights the non-equilibrium nature of plastic events, and increases the understanding of dynamic or shock deformation of amorphous solids at mesoscale.
分类号一类/力学重要期刊
WOS研究方向Materials Science ; Mechanics ; Physics
语种英语
WOS记录号WOS:001346200000001
资助机构National Outstanding Youth Science Fund Project {12125206] ; Basic Science Center for Multiscale Problems in Nonlinear Mechanics {11988102] ; Major International Joint Research Project {W2411003] ; NSFC {12302089] ; CAS Project for Young Scientists in Basic Research {YSBR-096]
其他责任者Jiang MQ
源URL[http://dspace.imech.ac.cn/handle/311007/97181]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.【Duan, X. M. & Yu, L. & Cai, S. L. & Dai, L. H. & Jiang, M. Q.】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.【Duan, X. M. & Yu, L. & Cai, S. L. & Dai, L. H. & Jiang, M. Q.】 Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Duan XM,Yu L,Cai SL,et al. Inertia effect of deformation in amorphous solids: A dynamic mesoscale model[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2024,193:105917.
APA 段鑫淼,喻立,蔡松林,戴兰宏,&蒋敏强.(2024).Inertia effect of deformation in amorphous solids: A dynamic mesoscale model.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,193,105917.
MLA 段鑫淼,et al."Inertia effect of deformation in amorphous solids: A dynamic mesoscale model".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 193(2024):105917.

入库方式： OAI收割

来源：力学研究所

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