| A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals | |
Wu B(吴波); Liang LH(梁立红) ; Ma HS(马寒松); Wei YG(魏悦广); Wei, YG; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
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| Source Publication | COMPUTATIONAL MATERIALS SCIENCE
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| 2012-05-01 | |
| Volume | 57Pages:2-7 |
| ISSN | 0927-0256 |
| Abstract | A trans-scale mechanics model considering both strain gradient and interface energy effects is presented for describing size effects in nanocrystalline and ultra-fine polycrystalline metals accompanying by intergranular fracture. A finite element method is developed which is suitable for describing the strain gradient and interface energy effects. Moreover, cohesive interface model is used to study the intergranular damage and fracture in polycrystalline metals with nanoscale and ultra-fine grains. A systematical study on the overall strength and ductility of polycrystalline aggregates which depend on both grain interiors and grain boundaries for different grain sizes and different interface properties is performed. The results show that the overall strength and ductility of polycrystalline aggregates with nanoscale and ultra-fine grains strongly depend on the grain size and grain hardening, interface energy density, grain boundary strength and toughness. |
| Keyword | Interface Energy Effect Strain Gradient Effect Intergranular Fracture Nanocrystalline Metal Cohesive Model Strain Gradient Plasticity Nanoindentation Test Mechanical-behavior Conventional Theory Crack-growth Deformation Solids Interface Nickel |
| Subject Area | 固体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000300990200002 |
| Funding Organization | The subject is supported by the National Science Foundation of China through Grant Nos. 11021262, 10932011, and 90816004. |
| Department | LNM新型材料及结构的多尺度力学 |
| Classification | 二类/Q2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46665 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wei, YG; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Wu B,Liang LH,Ma HS,et al. A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals[J]. COMPUTATIONAL MATERIALS SCIENCE,2012,57:2-7. |
| APA | 吴波,梁立红,马寒松,魏悦广,Wei, YG,&Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China..(2012).A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals.COMPUTATIONAL MATERIALS SCIENCE,57,2-7. |
| MLA | 吴波,et al."A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals".COMPUTATIONAL MATERIALS SCIENCE 57(2012):2-7. |
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