Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity
文献类型：期刊论文
| 作者 | Wei YG(魏悦广) ; Qiu X; Hwang KC
|
| 刊名 | Engineering Fracture Mechanics
 |
| 出版日期 | 2003 |
| 卷号 | 71页码:107-125 |
| ISSN号 | 0013-7944 |
| 通讯作者 | Wei, Y (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China. |
| 中文摘要 | Mode I steady-state crack growth is analyzed under plane strain conditions in small scale yielding. The elastic-plastic solid is characterized by the mechanism-based strain gradient (MSG) plasticity theory [J. Mech. Phys. Solids 47 (1999) 1239, J. Mech. Phys. Solids 48 (2000) 99]. The distributions of the normal separation stress and the effective stress along the plane ahead of the crack tip are computed using a special finite element method based on the steady-state fundamental relations and the MSG flow theory. The results show that during the steady-state crack growth, the normal separation stress on the plane ahead of the crack tip can achieve considerably high value within the MSG strain gradient sensitive zone. The results also show that the crack tip fields are insensitive to the cell size parameter in the MSG theory. Moreover, in the present research, the steady-state fracture toughness is computed by adopting the embedded process zone (EPZ) model. The results display that the steady-state fracture toughness strongly depends on the separation strength parameter of the EPZ model and the length scale parameter in the MSG theory. Furthermore, in order for the results of steady crack growth to be comparable, an approximate relation between the length scale parameters in the MSG theory and in the Fleck-Hutchinson strain gradient plasticity theory is obtained. |
| 学科主题 | 力学 |
| 类目[WOS] | Mechanics |
| 研究领域[WOS] | Mechanics |
| 关键词[WOS] | TIP FIELDS ; INTERFACE ADHESION ; MICRO-INDENTATION ; SINGLE-CRYSTALS ; 1ST PRINCIPLES ; SOLIDS ; RESISTANCE ; MODEL ; DELAMINATION ; DECOHESION |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000185968600006 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/17667]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Wei YG,Qiu X,Hwang KC. Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity[J]. Engineering Fracture Mechanics,2003,71:107-125. |
| APA | 魏悦广,Qiu X,&Hwang KC.(2003).Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity.Engineering Fracture Mechanics,71,107-125. |
| MLA | 魏悦广,et al."Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity".Engineering Fracture Mechanics 71(2003):107-125. |
入库方式： OAI收割
来源：力学研究所
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