期刊
INTERNATIONAL JOURNAL OF PLASTICITY
卷 50, 期 -, 页码 158-169出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2013.04.007
关键词
Phase transformation; Fracture toughness; Crack mechanics; Finite elements; Energy release rate
资金
- NSF [CMMI-1301139, MPS-0844082]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1301139] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0844082] Funding Source: National Science Foundation
A finite element analysis is carried out to model quasi-static stable crack growth in shape memory alloys under plane strain, mode I loading. The small scale transformation assumption is employed in the calculations using displacement boundary conditions on a circular region that encloses the stress-induced phase transformation zone. The crack is assumed to propagate in the region of elastically-deformed, fully-transformed martensitic zone ahead of the crack tip with the crack-tip energy release rate maintained at a critical value and the analysis is accomplished using the virtual crack closure technique. Results pertaining to the influence of stress-induced phase transformation on the near-tip mechanical fields and the ratio of the far-field energy release rate to the crack-tip energy release rate are presented, showing fracture toughness enhancement in accordance with experimental observations. Moreover, the effect of plastic dissipation on the fracture resistance of SMAs is discussed. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据