NiTi形状记忆合金丝拉伸试验研究
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摘要
通过对常温下的NiTi形状记忆合金丝进行拉伸试验,研究这种形状记忆合金材料的超弹性能力和加卸载循环下的耗能能力。根据试验结果分析应变幅值、加载频率和循环次数对这种记忆合金材料在奥氏体状态下加卸载循环时的等效刚度、单位循环的耗能能力和等效阻尼比的影响,并对三个特征参数随工作温度变化的规律进行了理论分析,为形状记忆合金阻尼器在工程结构中的应用奠定基础。
The tensile test of NiTi shape memory alloy (SMA) wires was completed on the super-elasticity behavior and energy dissipation capacity in circular loading of specimens at normal temperature. The influences of strain amplitude, loading frequency, as well as number of cycles on working performance, such as equivalent stiffness, energy dissipation per circles and equivalent damping ratio of the SMA wire in austenitic state are analyzed based on the experimental results,and the change rules of these three character parameters at different temperature are analyzed. The study provides a basis for the SMA damper to apply in structure engineering.
The tensile test of NiTi shape memory alloy (SMA) wires was completed on the super-elasticity behavior and energy dissipation capacity in circular loading of specimens at normal temperature. The influences of strain amplitude, loading frequency, as well as number of cycles on working performance, such as equivalent stiffness, energy dissipation per circles and equivalent damping ratio of the SMA wire in austenitic state are analyzed based on the experimental results,and the change rules of these three character parameters at different temperature are analyzed. The study provides a basis for the SMA damper to apply in structure engineering.
引文
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[2]吴波,孙科学,李惠.形状记忆合金力学性能的试验研究[J].地震工程与工程振动,1999,19(2):102-104.WU Bo,SUN Ke-xue,LI Hui.Experimental research on mechanical properties of shape memory alloy[J].Earthquake Engi-neering and Engineering Vibration,1999,19(2):102-104.
[3]Keith W,George C,Robert B.Passive-adaptive vibration absorbers using shape memory alloy[C].//Proc.of SPIE,1999,3668:630-641.
[4]欧进萍,关新春.土木工程智能结构体系的研究与发展[J].地震工程与工程振动,1999,19(2):21-28.OU Jin-ping,GUAN Xin-chun.State-of-the-art of smart structural systems in civil engineering[J].Earthquake Engineering and Engineering Vibration,1999,19(2):21-28.
[5]Miyazaki S,Otsuka K.Development of shape memory alloys[J].ISU International,1989,29:353-377.
[6]Chumlykov Y I,Kireeva I V.Superelasticity during the elastic twinning,slip and martensitic transformation[C].//Second international conference on shape memory and superelastic technologies,CA,USA,1997:29-34.
[7]Mauro Dolce.Donatello Cardone.Mechanical behavior of shape memory alloys for seismic application,Austenite NiTi wires subjected to tension[J].International Journal of Mechanical Sciences,2001,43(1):2657-2677.
[8]王社良,苏三庆,沈亚鹏.形状记忆合金拉锁被动控制结构地震响应分析[J].土木工程学报,2000,23(1):47-51.WANG She-liang,SU San-qing,SHEN Ya-peng.Seismic response analysis for passive structural control with shape memory alloy tendons[J].China Civil Engineering Journal,2000,23(1):47-51.
[9]王社良,薛凌云,苏三庆.形状记忆合金驱动器的力学性能[J].西安建筑科技大学学报(自然科学版),1999,31(3):233-236.WANG She-liang,XUE Ling-yun,SU San-qing.Mechanical behavior of shape memory alloy actuator[J].Journal of Xi′an U-niversity of Architecture and Technology(Natural Science Edition),1999,31(3):233-236.
[10]Feng Z C,Li D Z.Dynamics of a mechanical system with a shape memory alloy bar[J].Journal of Intelligent material System and Structures,1996(7):399-410.
[11]左晓宝,李爱群,倪立峰,等.超弹性形状记忆合金丝(NiTi)力学性能的试验研究[J].土木工程学报,2000,37(12):10-16.ZUO Xiao-bao,LI Ai-qun,NI Li-feng,et al.An experimental study on the mechanical behavior of superelastic NiTi shape memory alloy wires[J].China Civil Engineering Journal,2000,37(12):10-16.
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