Temperature Distributions of SMA Wires Embedded in Epoxy Resin Plates and Heated by Supplying Electric Current

Abstract

As a fundamental study of a smart structure having the functions of crack prevention and crack closure, the temperature distributions of multiple shape memory alloy (SMA) wires embedded in epoxy resin plates and heated by supplying electric current are investigated using an infrared thermography technique and the finite element method (FEM). The temperature distributions of SMA in the air and of the plate surface obtained using FEM are in reasonable agreement with those obtained using the thermography technique. The numerical results show that the temperature of the SMA wire surface embedded in the plates depends on the length between SMA wires and the plate thickness, and is less than that in air.

Keywords

smart structure shape memory alloy epoxy resin plate FEM thermography

Get full access to this article

View all access options for this article.

References

Baz, A. and Ro, J. 1992. “Thermo-dynamic Characteristics of NITINOL-reinforced Composite Beams,” Compos. Engng., 2(5–7): 527–542 .

Baz, A. , Chen, T. and Ro, J. 2000. “Shape Control of NITINOL-reinforced Composite Beams,” Compos. Part B: Engng., 31(8): 631–642 .

Egawa, K. 1992. “Intelligent Materials as Super Advanced Structures and Materials,” Science of Machine (in Japanese), 44(7): 793–799 .

Holman, J.P. 2002. Heat Transfer, 9th edn, pp. 315–334, McGraw-Hill, Boston, MA .

Ro, J. and Baz, A. 1995. “NITINOL-reinforced Plates: Part I. Thermal Characteristics,” Compos. Engng., 5(1): 61–75 .

Rogers, C.A. , Barker, D.K. and Jaeger, C.A. 1989. In: Rogers, C.A. (ed.), Smart Materials, Structures, and Mathematical Issue, pp. 17–28, Technomic Publishing Co. Inc., Lancaster, PA .

Shimamoto, A. and Taya, M. 1997. “Reduction in KI by Shape Memory Effect in a TiNi Shape-memory Fiber-reinforced Epoxy Matrix Composite,” Trans. Japan Society of Mechanical Engineers (in Japanese), Series A, 63(605): 26–31 .

Umezaki, E. 2000. “Improvement in Separation of SMA from Matrix in SMA Embedded Smart Structures,” Mater . Sci. Eng., Series A, 285(1,2): 363–369 .

Umezaki, E. and Watanabe, H. 1997. “Time Dependence of Crack Closure in Intelligent Structure Member with Embedded SMA,” In: Proc. of International Conference on Materials and Mechanics, Tokyo, Japan, pp. 793–797 .

10.

Umezaki, E. , Ikebe, H. Kawahara, E. and Watanabe, H. 1995. “Evaluation of Crack Closure Function in Intelligent Epoxy Material using Photoelastic Experiment,” In: Proc. of International Symposium on Advanced Technology in Experimental Mechanics, Tokyo, Japan, pp. 13–18 .

11.

Umezaki, E. , Kawahara, E. and Watanabe, H. 1997. “Evaluation of Crack Closure in Intelligent Epoxy Material with Embedded SMA,” In: Proc. of 5th Japan International SAMPE Symposium, Tokyo, Japan, pp. 925–930 .

12.

Umezaki, E. , Kawahara, E. and Watanabe, H. 1998. “Evaluation of Crack Closure in Intelligent Structure Member with Embedded SMA,” JSME Int. J., Series C, 41(3): 470–475 .