Φ10mm NiTiNb形状记忆合金管接头数值模拟分析
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摘要
采用数值模拟方法,研究了不同壁厚和内筋高度的NiTiNb形状记忆合金管接头径向应力与拉脱力随温度变化的定量关系。建立了能描述NiTiNb形状记忆合金管接头力学行为的本构方程,对径向应力与拉脱力进行了模拟计算,得到了NiTiNb形状记忆合金管接头在恒约束应变恢复过程中径向应力随温度的变化规律。采用数值模拟法分析了不同壁厚和内筋高度的管接头对径向应力的影响,掌握了拉脱力的变化规律,确定出NiTiNb形状记忆合金管接头最佳的壁厚和内筋高度。
The temperature-dependent quantitative relation between radial pressure and pull-out force of NiTiNb shape memory alloy pipe-coupling with different wall-thicknesses and inner rib heightes was investigated by numerical simulation method. The constitutive equation which could describe the mechanical behavior of NiTiNb shape memory alloy pipe-coupling was established by this investigation. The temperature-dependent changing rule of radial stresses of NiTiNb shape memory alloy pipe-coupling in the recovery process of constrained strain was found by the simulation calculation of radial stress and pull-out force. The effects of pipe-coupling with different wall-thicknesses and inner rib heightes on the radial stress were analyzed by numerical simulation method. The changing rule of pull-out force was grasped. And finally, the best wall-thickness, and inner rib and height NiTiNb shape memory alloy pipe-coupling were determined.
The temperature-dependent quantitative relation between radial pressure and pull-out force of NiTiNb shape memory alloy pipe-coupling with different wall-thicknesses and inner rib heightes was investigated by numerical simulation method. The constitutive equation which could describe the mechanical behavior of NiTiNb shape memory alloy pipe-coupling was established by this investigation. The temperature-dependent changing rule of radial stresses of NiTiNb shape memory alloy pipe-coupling in the recovery process of constrained strain was found by the simulation calculation of radial stress and pull-out force. The effects of pipe-coupling with different wall-thicknesses and inner rib heightes on the radial stress were analyzed by numerical simulation method. The changing rule of pull-out force was grasped. And finally, the best wall-thickness, and inner rib and height NiTiNb shape memory alloy pipe-coupling were determined.
引文
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[2]徐立虎,夏亚一,韵向东,等.医用Ni Ti合金改性进展[J].热加工工艺,2013,42(6):42-44.
[3]Khandelwal A,Buravalla V.Models for shape memory alloy behavior:an overview of modeling approaches[J].The International Journal of Structural Changes in Solids,2009(1):111-148.
[4]周博.形状记忆合金的本构模型[D].哈尔滨:哈尔滨工程大学,2006.
[5]严金良,沈亚鹏,陈儒.形状记忆合金管接头空间轴对称有限元分析[J].力学学报,1998,30(3):370-378.
[6]韩冬,刘福顺,李岩,等.不同壁厚的Ni Ti Fe形状记忆合金管接头紧固力的模拟计算[J].航空学报,2006,27(4):703-707.
[7]邹静,钟伟芳.形状记忆合金的多维本构关系[J].固体力学学报,1999,20(2):171-176.
[8]崔友海,刘永寿,岳珠峰.不同载荷下形状记忆合金管接头性能的有限元分析[J].机械设计与制造,2009(2):4-6.
[9]Nagaya K,Hirata Y.Analysis of a coupling made of shape memory alloy and its dynamic response due to impacts[J].Transactions of the ASME:Journal of Vibration and Acoustics,1992,114(3):297-304.
[10]张慧博,王健,金伟,等.Ni Ti Fe形状记忆合金管接头应力场模拟[J].中国有色金属学报,2010,20(s1):510-513.
[11]徐秉业,刘信声.应用弹塑性力学[M].北京:清华大学出版社,1995:80-190.
[12]莫华强.Ni Ti Nb形状记忆合金的性能研究及其作为中温管接头的优化设计[D].四川:四川大学,2003.
[13]中国航空材料手册编辑委员会.中国航空材料手册[M].北京:中国标准出版社,2001:85-89.