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Mesoscale Mechanisms in Viscoplastic Deformation of Metals and Their Applications to Constitutive Models
Huang, Wen Lai1; Zhang, Lin1; Chen, Kaiguo2; Lu, Guo3
2021-08-01
Source PublicationMATERIALS
Volume14Issue:16Pages:20
AbstractDeformation 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.
Keyworddislocation shock wave viscoplastic deformation constitutive model heterogeneity mesoscale
DOI10.3390/ma14164667
Language英语
WOS KeywordPLASTICITY ; DYNAMICS ; COPPER ; COMPRESSION ; VALIDATION ; COMPLEXITY ; VISCOSITY ; PRINCIPLE ; BEHAVIOR
Funding ProjectScience Challenge Project[TZ2018001] ; International Partnership Program of Chinese Academy of Sciences[122111KYSB20170068]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationScience Challenge Project ; International Partnership Program of Chinese Academy of Sciences
WOS IDWOS:000690525200001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50029
Collection中国科学院过程工程研究所
Corresponding AuthorHuang, Wen Lai
Affiliation1.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
Recommended Citation
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.
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