Study on Strain-Sense Property of TiNi and TiNiCu Shape Memory Alloys

Abstract

Concerning important infrastructures and civil structures, they need real time detection during the service, such as high-rise buildings, cables, bridges and dams. Therefore, it is necessary to study sensing property of shape memory alloy (SMA) for developing a sensing element embedded in the structures to carry out damage detection. In this paper, change rate of resistance-stress-strain relationship of TiNi and TiNiCu shape memory alloys (SMAs) under elongation is examined. Tests are conducted in MTS at room temperature for the mechanical and strain-sense properties. According to the test results, it is concluded that TiNi and TiNiCu in martensitic phase and austenitic TiNi SMA wires have good strain-sense property. The change rate of resistance of SMA wires has a linear relation with the applied strain. Additionally, stress-strain relation is also predicted by Brinson Model. This study is devoted to sensing properties of TiNi and TiNiCu shape memory alloy.

Keywords

TiNi TiNiCu shape memory alloy strain-sense property smart materials and structures

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References

Brinson

L.C.

(1993). “One-dimensional constitutive behavior of shape memory alloys: Thermomechanical derivation with non-constant material functions and redefined martensite internal variable”, Journal of Intelligent Material Systems and Structures, Vol. 4, pp. 229–242.

Liang

and Rogers

C.A.

(1990). “One-dimensional thermomechanical constitutive relations for shape memory materials”, Journal of Intelligent Material Systems and Structures, Vol. 1, No. 2, pp. 207–234.

Liang

and Rogers

C.A.

(1997). “Design of shape memory alloy actuators”, Journal of Intelligent Material Systems and Structures, Vol. 8, No. 4, pp. 303–313.

Mao

C.X.

J.P.

and Li

Z.W.

(2003). “Advanced health monitoring and damage repair technologies by using shape memory alloys”, Proceedings of the 4^th International Workshop on Structural Health Monitoring, Stanford, USA.

Liu

Z.Q.

Z.W.

, and Ou

J.P.

(2004). “Study on damage emergency repair performance of a simple beam embedded with shape memory alloys”, Advances in Structural Engineering, Vol.7, No.6, pp. 495–502.

Qiu

Z.X.

and Yao

X.T.

(2001). “Experiment research on sensor network embedded NiTi super-elastic wire in structure”, Journal of Transducer Technology, Vol. 20, No. 11, pp. 11–13. (in Chinese)

Tao

B.Q.

(1997). “Smart Material Structure”, Press of National Defense Industry, Beijing (in Chinese)

Wang

Z.Y.

(2004). Study on Material Performance and Constitutive Relation of NiTiCu Shape Memory Alloy, Postdoctoral Dissertation of Institute of Engineering Mechanics of China Seismological Bureau. (Supervisor: Zhang Min-zheng, Lihui)

X.D.

J.S.

and Wang

(1999). “The variation of electrical resistance of near stoichiometric NiTi during thermo-mechanic procedures”, Smart Material Structure, Vol. 8, pp. 574–578.

10.

X.D.

Fan

Y.Z.

and Wu

J.S.

(2000). “A study on the variations of the electrical resistance for NiTi shape memory alloy wires during the thermo-mechanical loading”, Materials and Design, Vol. 21, pp. 511–515.

11.

Yao

X.T.

Zhou

Y.D.

and Qiu

Z.X.

(2002). “Stress-sense property of TiNi shape memory alloy and its mechanism”, Materials for Mechanical Engineering, Vol. 26, No. 3, pp. 35–37. (in Chinese)