Structural and topological nature of plasticity in sheared granular materials
文献类型：期刊论文
| 作者 | Cao, YX; Li, JD; Kou, BQ; Xia, CJ; Li, ZF; Chen, RC; Xie, HL; Xiao, TQ; Kob, W; Hong, L |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2018 |
| 卷号 | 9期号:-页码:- |
| ISSN号 | 2041-1723 |
| 关键词 | METALLIC GLASSES FLOW DEFORMATION REARRANGEMENTS PACKING |
| DOI | 10.1038/s41467-018-05329-8 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Upon mechanical loading, granular materials yield and undergo plastic deformation. The nature of plastic deformation is essential for the development of the macroscopic constitutive models and the understanding of shear band formation. However, we still do not fully understand the microscopic nature of plastic deformation in disordered granular materials. Here we used synchrotron X-ray tomography technique to track the structural evolutions of three-dimensional granular materials under shear. We establish that highly distorted coplanar tetrahedra are the structural defects responsible for microscopic plasticity in disordered granular packings. The elementary plastic events occur through flip events which correspond to a neighbor switching process among these coplanar tetrahedra (or equivalently as the rotation motion of 4-ring disclinations). These events are discrete in space and possess specific orientations with the principal stress direction. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31123]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Inst Nat Sci, Shanghai 200240, Peoples R China 2.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China 3.Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 5.Univ Montpellier, Lab Charles Coulomb, UMR 5521, F-34095 Montpellier, France 6.CNRS, F-34095 Montpellier, France 7.Shanghai Jiao Tong Univ, Mat Genome Initiat Ctr, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, YX,Li, JD,Kou, BQ,et al. Structural and topological nature of plasticity in sheared granular materials[J]. NATURE COMMUNICATIONS,2018,9(-):-. |
| APA | Cao, YX.,Li, JD.,Kou, BQ.,Xia, CJ.,Li, ZF.,...&Wang, YJ.(2018).Structural and topological nature of plasticity in sheared granular materials.NATURE COMMUNICATIONS,9(-),-. |
| MLA | Cao, YX,et al."Structural and topological nature of plasticity in sheared granular materials".NATURE COMMUNICATIONS 9.-(2018):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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