铁基形状记忆合金防松螺母防断机理的数值分析  

NUMERIC ANALYSIS OF THE ANTI-BREAKING MECHANISM OF FE-BASED SMA LOCKNUT

作　　者：李俊良[1] 杜彦良 孙宝臣[1] 

机构地区：[1]石家庄铁道学院,河北石家庄050043

出　　处：《工程力学》2005年第6期192-196,共5页Engineering Mechanics

基　　金：河北省博士基金资助项目(B2001215);河北省科技攻关资助项目(99212102D)

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。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.

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 

分 类 号：O346.2[理学—固体力学] TH131.3[理学—力学]