| 铁基形状记忆合金防松螺母防断机理的数值分析 |
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| 引用本文： | 李俊良,杜彦良,孙宝臣.铁基形状记忆合金防松螺母防断机理的数值分析[J].工程力学,2005,22(6):192-196. |
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| 作者姓名： | 李俊良 杜彦良 孙宝臣 |
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| 作者单位： | 石家庄铁道学院,河北,石家庄,050043;石家庄铁道学院,河北,石家庄,050043;石家庄铁道学院,河北,石家庄,050043 |
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| 基金项目： | 河北省教育厅博士科研项目;河北省科技攻关项目 |
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| 摘 要： | 由于铁基形状记忆合金材料本身的特殊性能,由其制成的螺母所组成的螺栓联接中,不仅螺纹副之间的自锁摩擦力矩有所提高,而且轴向载荷在各螺纹齿间分布的均匀性也得以改善,从而有效地防止了螺纹联接松动、松脱及疲劳断裂等失效现象的发生。主要对这种新型螺母的防断机理进行了分析,建立了螺栓联接载荷分布的计算模型,并通过与普通螺栓联接的比较,对这种新型螺母的防断性能进行了评价。
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| 关 键 词： | 智能材料与结构 防断机理 数值分析 铁基形状记忆合金 防松螺母 |
| 文章编号： | 1000-4750（2005）06-0192-05 |
| 收稿时间： | 2003-05-15 |
| 修稿时间： | 2003-05-152004-06-25 |
NUMERIC ANALYSIS OF THE ANTI-BREAKING MECHANISM OF FE-BASED SMA LOCKNUT |
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| LI Jun-liang,DU Yan-liang,SUN Bao-chen.NUMERIC ANALYSIS OF THE ANTI-BREAKING MECHANISM OF FE-BASED SMA LOCKNUT[J].Engineering Mechanics,2005,22(6):192-196. |
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| Authors: | LI Jun-liang DU Yan-liang SUN Bao-chen |
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| Affiliation: | Shijiazhuang Railway Institute, Shijazhuang 050043, China |
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| Abstract: | Because of the characteristics of Fe-based shape memory alloy, the self-locking frictional moment in the thread connection of a new nut made of the alloy is considerably increased, and the uniformity of the axial load distributed among every screw tooth is also improved. As a result, the failure phenomena, such as thread-connection loosing, disengaging and thread fatigue fracture, are effectively prevented. In this paper the anti-breaking mechanism of the nut is analyzed. A calculation model of the load distribution in the newly-designed bolt connection is established, and the anti-breaking performance of the nut is appraised based on comparison with ordinary bolt connections. |
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| Keywords: | smart material and structure anti-breaking mechanism numeric analysis Fe-base SMA locknut |
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