Cyclic Properties of Superelastic Shape Memory Alloy Wires and Bars
Publication: Journal of Structural Engineering
Volume 130, Issue 1
Abstract
This study evaluates the properties of superelastic Ni–Ti shape memory alloys under cyclic loading to assess their potential for applications in seismic resistant design and retrofit. Shape memory alloy wire and bars are tested to evaluate the effect of bar size and loading history on the strength, equivalent damping, and recentering properties of the shape memory alloys in superelastic form. The bars are tested under both quasistatic and dynamic loading. The results show that nearly ideal superelastic properties can be obtained in both wire and bar form of the superelastic Ni–Ti shape memory alloys. However, the wire form of the shape memory alloys show higher strength and damping properties compared with the bars. The recentering capabilities (based on residual strains) are not affected by section size. Overall, the damping potential of shape memory alloys in superelastic form is low for both wire and bars, typically less than 7% equivalent viscous damping. Cyclical strains greater than 6% lead to degradation in the damping and recentering properties of the shape memory alloys. Strain rate effects are evaluated by subjecting the shape memory alloys to loading rates representative of typical seismic loading. The results show that increased loading rates lead to decreases in the equivalent damping, but have negligible effects on the recentering properties of the shape memory alloys.
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References
Adachi, Y., and Unjoh, S.(1999). “Development of shape memory alloy damper for intelligent bridge systems.” Proc. SPIE, 3671, 31–42.
Asai, M., and Suzuk, Y.(2000). “Applications of shape memory alloys in Japan.” Mater. Sci. Forum, 327–328, 17–22.
Beauchamp, C. H. (1992). “Shape memory alloy adjustable camber (SMAAC) control surfaces.” Proc., 1st European Conf. on Smart Structures and Materials, Glasgow, U.K., 189–192.
Chandra, R.(2001). “Active shape control of composite blades using shape memory actuation.” Smart Mater. Struct., 10, 1018–1024.
Clark, P., Aiken, I., Kelly, J., Higashino, M., and Krumme, R. (1995). “Experimental and analytical studies of shape memory alloy dampers for structural control.” Proc., Passive Damping, San Diego.
Delemont (2002). “Seismic retrofit of bridges using shape memory alloys.” Masters thesis, Georgia Institute of Technology, Atlanta.
Dolce, M., and Cardone, D.(2001a). “Mechanical behaviour of shape memory alloys for seismic applications 1. Martensite and austenite NiTi bars subjected to torsion.” Int. J. Mech. Sci., 43(11), 2631–2656.
Dolce, M., and Cardone, D.(2001b). “Mechanical behaviour of shape memory alloys for seismic applications 2. Austenite NiTi wires subjected to tension.” Int. J. Mech. Sci., 43(11), 2657–2677.
Dolce, M., and Marnetto, R. (1999). “Seismic devices based on shape memory alloys.” Manside Project, II105-134. Italian Dept. for National Technical Services, Rome.
Duerig, T., Melton, K., Stokel, D., and Wayman, C. (1990). Engineering aspects of shape memory alloys, Butterworth–Heinemann, London.
Friend, C. M., and Morgan, N. (1999). “Fatigue/cyclic stability of shape-memory alloys.” SMST-99: Proc., 1st European Conf. on Shape Memory and Superelasticity, Atwerp Zoo, Belgium, 115–128.
Graesser, E., and Cozzarelli, F.(1991). “Shape-memory alloys as new materials for aseismic isolation.” J. Eng. Mech., 117(11), 2590–2608.
Hsu, S. E., Yeh, M. T., Hsu, I. C., Chang, S. K., Dai, Y. C., and Wang, J. Y.(2000). “Pseudo-elasticity and shape memory effect on the TiNiCoV alloy.” Mater. Sci. Forum, 327–328, 119–122.
Inaudi, J., and Kelly, J. (1994). “Experiments on tuned mass dampers using viscoelastic, frictional and shape-memory alloy materials.” Proc., 1st World Conf. on Structural Control, Los Angeles, 127–136.
Kawaguchi, M., Ohashi, Y., and Tobushi, H.(1991). “Cyclic characteristics of pseudoelasticity of Ti–Ni alloys (effect of maximum strain, test temperature and shape memory processing temperature).” JSME Int. J., 34(1), 76–82.
MANSIDE. (1998). “Memory Alloys For New Structural Vibrations Isolating Devices.” Manside Third Twelve Monthly Progress Rep., Italian Dept. for National Technical Services, Rome.
Miyazaki, S. (1990). Thermal and stress cycling effects and fatigue properties of Ni–Ti alloys, engineering aspects of shape memory alloys, T. W. Duerig, K. N. Melton, D. Stockel, and C. M. Wayman, eds., Butterworth–Heinemann, London, 394–413.
Miyazaki, S., Imai, T., Igo, Y., and Otsuka, K.(1986). “Effect of cyclic deformation on the pseudoelasticity characteristics of Ti–Ni alloys.” Metall. Trans. A, 17A, 115–120.
Ocel, J., Leon, R. T., DesRoches, R., Krumme, R., Hayes, J., and Sweeney, S. (2002). “High damping steel beam-column connections using shape memory alloys.” Proc., 7th U.S. National Conf. in Earthquake Engineering, Boston.
Ohi, K. (2001). “Pseudo-dynamic earthquake response tests and cyclic loading tests on steel frames including pseudo-elastic elements.” Proc., NSF–JSPS, U.S.–Japan Seminar on Advanced Stability and Seismicity Concepts for Performance-Based Design of Steel and Composite Structures, Kyoto, Japan.
Serneels, A. (1999). “Shape memory alloy characterization and optimizations.” SMST-99: Proc., 1st European Conf. on Shape Memory and Superelasticity, Atwerp Zoo, Belgium, 6–23.
Strandel, B., Ohashi, S., Ohtsuka, H., Ishihara, T., and Miyazaki, S.(1995a). “Cyclic stress–strain characteristics of Ti–Ni and Ti–Ni–Cu shape memory alloys.” Mater. Sci. Eng., A, 202, 148–156.
Strandel, B., Ohashi, S., Ohtsuka, H., Miyazaki, S., and Ishihara, T.(1995b). “Effects of mechanical cycling on the pseudoelasticity characteristics of Ti–Ni and Ti–Ni–Cu alloys.” Mater. Sci. Eng., A, 203, 187–196.
Sweeney, S., and Hayes, J. (1995). “Shape memory alloy dampers for seismic rehabilitation of existing buildings.” Proc., 27th Joint Meeting on Wind and Seismic Effects, U.S.–Japan Cooperative Program in Natural Resources, Tsukuba, Japan, 317–332.
Tobushi, H., Iwanaga, H., Tanaka, H., Tatsuya, H., and Sawada, T.(1992). “Stress–strain–temperature relationships of TiNi shape memory alloy suitable for thermomechanical cycling.” JSME Int. J., 35(3), 271–277.
Tobushi, H., Shimeno, Y., Hachisuka, T., and Tanaka, K.(1998). “Influence of strain rate on superelastic properties of TiNi shape memory alloys.” Mech. Mater., 30, 141–150.
Wilde, K., Gardoni, P., and Fujino, Y.(2000). “Base isolation system with shape memory alloy device for elevated highway bridges.” Eng. Struct., 22(3), 222–229.
Wolons, D., Gandhi, F., and Malovrh, B.(1998). “Experimental investigation of the pseudoelastic hysteresis damping characteristics of shape memory alloy wires.” J. Intell. Mater. Syst. Struct., 9(2), 116–126.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 130 • Issue 1 • January 2004
Pages: 38 - 46
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Sep 4, 2002
Accepted: Mar 26, 2003
Published online: Dec 15, 2003
Published in print: Jan 2004
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