| The effective fracture strength and fracture toughness of solids with energy dissipation confined to localized strips | |
Zeng XG; Wei YJ(魏宇杰)
| |
| Corresponding Author | Wei, Yujie([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF PLASTICITY
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| 2019-09-01 | |
| Volume | 120Pages:47-63 |
| ISSN | 0749-6419 |
| Abstract | Inelastic localized deformation in front of a crack tip dissipates energy and toughens the material. Such concentrated deformation could be resulted from plastic localization in solids, such as interfacial sliding in composites composing of heterogeneous layers, or by shear banding as seen in bulk metallic glasses (BMGs). The mechanisms of the localized deformation and the size of such events are crucial for the effective fracture properties of those particular solids. In this paper, we investigate the effective fracture strength and fracture toughness of solids where dissipation is dominantly contributed from plasticity in narrow strips by shear banding or interfacial sliding. We derive the analytical solutions in solids where energy dissipation occurs in co-planar elastic perfectly plastic strips with strain softening, and also give approximate formulas of the effective strength and toughness for the solids with symmetric plastic strips. The toughening as a function of branching angle, thickness, yield stress, strength-softening ratio and local fracture toughness of the strips is determined quantitatively. The theory is also verified using finite-element (FE) simulations. These theoretical and finite element analysis supply a base for the design of strong and tough materials in which the plastic deformation is restricted within strips. |
| Keyword | Effective toughness Fracture strength Strain softening Shear banding Strip-yield model |
| DOI | 10.1016/j.ijplas.2019.03.006 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000477691700002 |
| WOS Keyword | CRACK-GROWTH ; METALLIC-GLASS ; SHEAR BANDS ; DEFORMATION ; INTERFACE ; MODEL ; TIP ; MICROSTRUCTURE ; MECHANISMS ; RESISTANCE |
| WOS Research Area | Engineering ; Materials Science ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| Funding Project | National Natural Science Foundation of China[11425211] ; National Natural Science Foundation of China[11790291] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020200] ; Foshan University |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Foshan University |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wei, Yujie |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/79476 |
| Collection | 非线性力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Zeng XG,Wei YJ. The effective fracture strength and fracture toughness of solids with energy dissipation confined to localized strips[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2019,120:47-63.Rp_Au:Wei, Yujie |
| APA | Zeng XG,&魏宇杰.(2019).The effective fracture strength and fracture toughness of solids with energy dissipation confined to localized strips.INTERNATIONAL JOURNAL OF PLASTICITY,120,47-63. |
| MLA | Zeng XG,et al."The effective fracture strength and fracture toughness of solids with energy dissipation confined to localized strips".INTERNATIONAL JOURNAL OF PLASTICITY 120(2019):47-63. |
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| Jp2019221.pdf（2027KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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