Cansmart 2005 International Workshop SMART MATERIALS and STRUCTURES

International Workshop on SMART MATERIALS, STRUCTURES NDT in Canada 2013Conference & NDT for the Energy Industry October 7-10, 2013 Calgary, Alberta, CANADA

Non-Linear Effects in Smart Materials and Structures Properties of Applied Field and Stress

Mike Who1, Stan When2, Robert Where3

1Department of Mechanical Engineering, University of Lalala, [email protected] 2Department of Material Engineering, Toronto University, Toronto [email protected] 3engineering Manager, Mattard Inc, Toronto [email protected]

ABSTRACT

In this paper, studies are the feasibility of using Shape Memory Alloy (SMA) actuator to control the dynamic mechanical response of a cantilever beam. Thermo mechanical behaviours of the SMA are firstly characterized to provide the necessary and accurate technical parameters for designing the control logic for the experiments. The SMA actuator is bonded on the surface of the beam at the base and is heated by flexible foil heater, which is controlled by the computer. Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching. Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching.

Keywords: Abstract, Papers, Materials, Structures.

2013 CANSMART CINDE IZFP INTRODUCTION

Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching. Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching.

Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching.

EXPERIMENTS Characterization of SMA

First Step: The SMA used in this study is a commercially available Ni-Ti alloy (commercial name: Nitinol) in sheet form. The thickness, width and length upon activation 1) The thickness, width and length Upon activation 2) The thickness, width and length Upon activation

T D3   33 E3  d 33T3 E (1) S3  d 33 E3  s33T3

where E, D, T, and S, are the electric field, dielectric displacement, stress, and strain, respectively.

) 8 % (

y 7 c n

e 6 u q e

r 4 u t a 3 N

2 e g n 1 a h

C 0 0 20 40 60 80 100 Temperature (C)

Fig. 1: Variation of the SMA of applied field.

2013 CANSMART CINDE IZFP Cansmart 2005 International Workshop SMART MATERIALS AND STRUCTURES 13 - 14 October 2005, Toronto, Ontario, Canada

Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching. Upon activation of the SMA, the natural frequency of the cantilever beam can be effectively shifted up. The potential of this study may lead to the development of an active control system to prevent the occurrence of resonance of space structure during manufacturing, transportation and launching as shown in Figure 1.

REFERENCES

1. Zienkiewicz, O.C., “The Finite Element Method”, 3rd Edition, McGraw-Hill, 1971. 2. Debus, J.C., Mosbah P. and Blottman III, J. B. “Thermal Behaviour Modelling of High Power Active Devices Using the ATILA Finite Element Code”, Cansmart 2005, Proceedings International Workshop on Smart Materials and Structures, Ed. G. Akhras, Toronto, Canada, 13-14 Oct. 2005, pp. 43-52. 3. McMahon, G. W., Jones, D F., ABarrel stave projector@, US Patent 4,922,470, May 1, 1990.

2013 CANSMART CINDE IZFP