Experimental and FEM analysis of the fracture behavior in NiTi shape memory alloys

Xinmei Wang; Zhufeng Yue

doi:10.4028/0-87849-413-8.919

Experimental and FEM analysis of the fracture behavior in NiTi shape memory alloys

Xinmei Wang, Zhufeng Yue

力学与土木建筑学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

6 引用（Scopus）

摘要

In the present work, the fracture toughness of a NiTi pseudoelastic alloy has been obtained by experiments on CT specimens, which is K_IC = 39.38MPam^1/2. Then the stress induced phase transformation behavior in front of the crack tip of the CT specimen is simulated by a micromechanical model considering the different elastic properties between martensite and austenite. The results show that the pre-crack promotes phase transformation at the crack tip. And the phase transformation is localised near the crack tip. It is also shown that phase transformation reduces the Mises stress around the crack tip.

源语言	英语
页（从-至）	919-922
页数	4
期刊	Key Engineering Materials
卷	324-325 II
DOI	https://doi.org/10.4028/0-87849-413-8.919
出版状态	已出版 - 2006

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abstract = "In the present work, the fracture toughness of a NiTi pseudoelastic alloy has been obtained by experiments on CT specimens, which is KIC = 39.38MPam1/2. Then the stress induced phase transformation behavior in front of the crack tip of the CT specimen is simulated by a micromechanical model considering the different elastic properties between martensite and austenite. The results show that the pre-crack promotes phase transformation at the crack tip. And the phase transformation is localised near the crack tip. It is also shown that phase transformation reduces the Mises stress around the crack tip.",

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T1 - Experimental and FEM analysis of the fracture behavior in NiTi shape memory alloys

AU - Wang, Xinmei

AU - Yue, Zhufeng

PY - 2006

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N2 - In the present work, the fracture toughness of a NiTi pseudoelastic alloy has been obtained by experiments on CT specimens, which is KIC = 39.38MPam1/2. Then the stress induced phase transformation behavior in front of the crack tip of the CT specimen is simulated by a micromechanical model considering the different elastic properties between martensite and austenite. The results show that the pre-crack promotes phase transformation at the crack tip. And the phase transformation is localised near the crack tip. It is also shown that phase transformation reduces the Mises stress around the crack tip.

AB - In the present work, the fracture toughness of a NiTi pseudoelastic alloy has been obtained by experiments on CT specimens, which is KIC = 39.38MPam1/2. Then the stress induced phase transformation behavior in front of the crack tip of the CT specimen is simulated by a micromechanical model considering the different elastic properties between martensite and austenite. The results show that the pre-crack promotes phase transformation at the crack tip. And the phase transformation is localised near the crack tip. It is also shown that phase transformation reduces the Mises stress around the crack tip.

KW - Experiments

KW - FEM

KW - Fracture

KW - NiTi shape memory alloys

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VL - 324-325 II

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EP - 922

JO - Key Engineering Materials

JF - Key Engineering Materials

ER -

Experimental and FEM analysis of the fracture behavior in NiTi shape memory alloys

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