| The effective fracture strength and fracture toughness of solids with energy dissipation confined to localized strips |
| Zeng XG; Wei YJ(魏宇杰)
|
| 通讯作者 | Wei, Yujie(yujie_wei@lnm.imech.ac.cn)
|
| 发表期刊 | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 2019-09-01
|
| 卷号 | 120页码:47-63 |
| ISSN | 0749-6419
|
| 摘要 | 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. |
| 关键词 | Effective toughness
Fracture strength
Strain softening
Shear banding
Strip-yield model
|
| DOI | 10.1016/j.ijplas.2019.03.006
|
| 收录类别 | SCI
; EI
|
| 语种 | 英语
|
| WOS记录号 | WOS:000477691700002
|
| 关键词[WOS] | CRACK-GROWTH
; METALLIC-GLASS
; SHEAR BANDS
; DEFORMATION
; INTERFACE
; MODEL
; TIP
; MICROSTRUCTURE
; MECHANISMS
; RESISTANCE
|
| WOS研究方向 | Engineering
; Materials Science
; Mechanics
|
| WOS类目 | Engineering, Mechanical
; Materials Science, Multidisciplinary
; Mechanics
|
| 资助项目 | 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
|
| 项目资助者 | National Natural Science Foundation of China
; Strategic Priority Research Program of the Chinese Academy of Sciences
; Foshan University
|
| 论文分区 | 一类
|
| 力学所作者排名 | 1
|
| RpAuthor | Wei, Yujie
|
| 引用统计 |
|
| 文献类型 | 期刊论文
|
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/79476
|
| 专题 | 非线性力学国家重点实验室
|
推荐引用方式
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.
|
| 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.
|
修改评论