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Growth of thermoplastic shear band

文献类型：期刊论文

作者Sheng DL(盛冬林)2,3; Chen, Yan2,3; Zhou, FengHua1; Dai LH(戴兰宏)2,3
刊名JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
出版日期2024-11-01
卷号33页码:4783-4795
关键词Thermoplastic shear bands Strain (rate) hardening Thermal softening Momentum diffusion Thermal diffusion
ISSN号2238-7854
DOI10.1016/j.jmrt.2024.10.148
通讯作者Dai, Lan-Hong(lhdai@lnm.imech.ac.cn)
英文摘要Shear localization is a fundamental and widely observed non-equilibrium phenomenon in metallic materials subjected to impulsive loadings. Despite extensive research over several decades, the evolution of shear bands still remains poorly understood. In this study, we propose a two-stage model to describe the evolution of thermoplastic shear band, where the effects of strain hardening, strain-rate hardening, and thermal softening are involved. Our analysis reveals that the growth of thermoplastic shear band is derived by the competition between momentum diffusion and thermal diffusion processes, which is controlled by the solid-state equivalent of the Prandtl number. By incorporating these factors into our model, we find that the presence of hardening effect retards the evolution of shear bands, resulting in a wider shear band and increased dissipation of energy. Theoretical calculation results of shear bandwidth, shear band strain, propagation velocity, process zone geometry and dimensions, critical dissipation energy, shear band toughness, and shear band spacing are well consistent with available experimental data. Additionally, we explore the potential transition to turbulence controlled by Reynolds number within shear bands and investigate the influence of the Taylor-Quinney coefficient on the evolution of shear bands. These findings are expected to offer valuable insights into the mechanism of shear band evolution.
分类号一类
WOS关键词TAYLOR-QUINNEY COEFFICIENT ; MICROSTRUCTURAL EVOLUTION ; DYNAMIC COMPRESSION ; LOCALIZATION ; STRAIN ; ALLOY ; STEEL
资助项目NSFC[12432019,12322214,12102433] ; NSFC[11972346] ; NSFC[2021-2-3] ; NSFC[11988102] ; NSFC[KFJJ23-03M]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001339712000001
资助机构NSFC
其他责任者Dai, Lan-Hong
源URL[http://dspace.imech.ac.cn/handle/311007/97121]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Ningbo Univ, Fac Mech Engn & Mech, Ningbo 315211, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, 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		 Sheng DL,Chen, Yan,Zhou, FengHua,et al. Growth of thermoplastic shear band[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:4783-4795.
APA 盛冬林,Chen, Yan,Zhou, FengHua,&戴兰宏.(2024).Growth of thermoplastic shear band.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,4783-4795.
MLA 盛冬林,et al."Growth of thermoplastic shear band".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):4783-4795.

入库方式： OAI收割

来源：力学研究所

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