| 具有层状微观结构的NiTi单晶本构模型 |
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| 引用本文： | 朱祎国,赵聃.具有层状微观结构的NiTi单晶本构模型[J].力学学报,2011,43(6):1117-1124. |
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| 作者姓名： | 朱祎国 赵聃 |
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| 作者单位： | 大连理工大学工业装备结构分析国家重点实验室, 大连理工大学运载工程与力学学部 |
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| 基金项目： | 国家自然科学基金资助项目(10602011)~~ |
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| 摘 要： | 建立了应力诱发的具有层状微观结构的NiTi单晶本构模型. 模型考虑母相
和马氏体相弹性各向异性性质的差异, 以NiTi单晶相变过程中可能出现的24个马氏体变体
为基础, 利用相变驱动力和理想界面的连续条件推导了马氏体相变的发生及发展过程, 以及
单晶相变过程中宏微观应力应变的演化, 数值模拟了在不同加载方向材料的应力应变响应.
结果表明, 对于不同的加载方向, NiTi单晶既存在强化也存在软化现象.
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| 关 键 词： | NiTi单晶 层状微观结构 本构模型 软化 |
| 收稿时间： | 2010-06-18 |
| 修稿时间： | 2011-06-27 |
CONSTITUTIVE MODEL OF NiTi SINGLE CRYSTAL WITH LAMINATED MICROSTRUCTURE |
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| Zhu Yiguo Zhao Dan.CONSTITUTIVE MODEL OF NiTi SINGLE CRYSTAL WITH LAMINATED MICROSTRUCTURE[J].chinese journal of theoretical and applied mechanics,2011,43(6):1117-1124. |
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| Authors: | Zhu Yiguo Zhao Dan |
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| Institution: | State Key Laboratory of Structural Analysis for Industrial Equipment, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116023, China |
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| Abstract: | A stress-induced constitutive model of laminated NiTi single crystal was constructed.Based on the laminated microstructure of martensite twins and the difference of the elastic anisotropic properties between austenite and martensite phases,we constructed the model using thermodynamics with perfect interface condition.We also numerically simulated the evolution of micro-stress and strain during phase transformation and the response of stress-strain to the different loading directions.The numerical results sh... |
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| Keywords: | NiTi single crystal laminated microstructure constitutive model softening |
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