中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 过程工程研究所
  3. 中国科学院过程工程研究所
Mesoscale Mechanisms in Viscoplastic Deformation of Metals and Their Applications to Constitutive Models

文献类型：期刊论文

作者Huang, Wen Lai1; Zhang, Lin1; Chen, Kaiguo2; Lu, Guo3
刊名MATERIALS
出版日期2021-08-01
卷号14期号:16页码:20
关键词dislocation shock wave viscoplastic deformation constitutive model heterogeneity mesoscale
DOI10.3390/ma14164667
英文摘要Deformation of metals has attracted great interest for a long time. However, the constitutive models for viscoplastic deformation at high strain rates are still under intensive development, and more physical mechanisms are expected to be involved. In this work, we employ the newly-proposed methodology of mesoscience to identify the mechanisms governing the mesoscale complexity of collective dislocations, and then apply them to improving constitutive models. Through analyzing the competing effects of various processes on the mesoscale behavior, we have recognized two competing mechanisms governing the mesoscale complex behavior of dislocations, i.e., maximization of the rate of plastic work, and minimization of the elastic energy. Relevant understandings have also been discussed. Extremal expressions have been proposed for these two mesoscale mechanisms, respectively, and a stability condition for mesoscale structures has been established through a recently-proposed mathematical technique, considering the compromise between the two competing mechanisms. Such a stability condition, as an additional constraint, has been employed subsequently to close a two-phase model mimicking the practical dislocation cells, and thus to take into account the heterogeneous distributions of dislocations. This scheme has been exemplified in three increasingly complicated constitutive models, and improves the agreements of their results with experimental ones.
WOS关键词PLASTICITY ; DYNAMICS ; COPPER ; COMPRESSION ; VALIDATION ; COMPLEXITY ; VISCOSITY ; PRINCIPLE ; BEHAVIOR
资助项目Science Challenge Project[TZ2018001] ; International Partnership Program of Chinese Academy of Sciences[122111KYSB20170068]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:000690525200001
出版者MDPI
资助机构Science Challenge Project ; International Partnership Program of Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/50028]  
专题中国科学院过程工程研究所
通讯作者Huang, Wen Lai
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shockwave Phys & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China
3.Inst Appl Phys & Computat Math, Lab Computat Phys, Beijing 100088, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Wen Lai,Zhang, Lin,Chen, Kaiguo,et al. Mesoscale Mechanisms in Viscoplastic Deformation of Metals and Their Applications to Constitutive Models[J]. MATERIALS,2021,14(16):20.
APA Huang, Wen Lai,Zhang, Lin,Chen, Kaiguo,&Lu, Guo.(2021).Mesoscale Mechanisms in Viscoplastic Deformation of Metals and Their Applications to Constitutive Models.MATERIALS,14(16),20.
MLA Huang, Wen Lai,et al."Mesoscale Mechanisms in Viscoplastic Deformation of Metals and Their Applications to Constitutive Models".MATERIALS 14.16(2021):20.

入库方式： OAI收割

来源：过程工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。