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Journal articles on the topic 'Shape Memory Alloy Spring'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Liang, C., and C. A. Rogers. "Design of Shape Memory Alloy Springs With Applications in Vibration Control." Journal of Vibration and Acoustics 115, no. 1 (1993): 129–35. http://dx.doi.org/10.1115/1.2930305.

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Shape memory alloys (SMAs) have several unique characteristics, including their Young’s modulus-temperature relations, shape memory effects, and damping characteristics. The Young’s modulus of the high-temperature austenite of SMAs is about three to four times as large as that of low-temperature martensite. Therefore, a spring made of shape memory alloy can change its spring constant by a factor of three to four. Since a shape memory alloy spring can vary its spring constant, provide recovery stress (shape memory effect), or be designed with a high damping capacity, it may be useful in adaptiv

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2

Sreekanth, M., Abraham T. Mathew, and R. Vijayakumar. "A novel model-based approach for resistance estimation using rise time and sensorless position control of sub-millimetre shape memory alloy helical spring actuator." Journal of Intelligent Material Systems and Structures 29, no. 6 (2017): 1050–64. http://dx.doi.org/10.1177/1045389x17730911.

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Shape memory alloy shows considerable strain during heating and cooling. This effect is due to its phase transformation with temperature. Due to this property, shape memory alloys can be deployed for physical actuation in place of conventional actuators in bio-medical and bio-mimicking robots. Sub-millimetre diameter shape memory alloy wires wound as helical springs are also used for this purpose. Due to their small size, it is difficult to use sensors for temperature or displacement measurements of shape memory alloy springs. This article attempts to demonstrate that the rise time of the curr

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3

Hamano, Toshio, and Shigemi Sato. "Design of coil spring of shape memory alloy." Bulletin of the Japan Institute of Metals 24, no. 1 (1985): 51–55. http://dx.doi.org/10.2320/materia1962.24.51.

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4

HAMANO, Toshio, and Shigemi SATO. "Design of coil spring of shape memory alloy." Transactions of Japan Society of Spring Engineers, no. 31 (1986): 31–38. http://dx.doi.org/10.5346/trbane.1986.31.

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5

Siahsarani, A., A. H. Behravesh, and M. Barmouz. "Compressive shape memory behavior of spring-shaped polylactic acid alloy type." Journal of Applied Polymer Science 134, no. 30 (2017): 45115. http://dx.doi.org/10.1002/app.45115.

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6

Lee, Jong-Gu, Junghyun Ryu, Hyeok Lee, and Maenghyo Cho. "Saddle-shaped, bistable morphing panel with shape memory alloy spring actuator." Smart Materials and Structures 23, no. 7 (2014): 074013. http://dx.doi.org/10.1088/0964-1726/23/7/074013.

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7

Liang, C., and C. A. Rogers. "Design of Shape Memory Alloy Actuators." Journal of Mechanical Design 114, no. 2 (1992): 223–30. http://dx.doi.org/10.1115/1.2916935.

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This paper describes the design of shape memory alloy force and displacement actuators based upon the thermomechanical constitutive relations previously developed by the authors. Numerical simulations and design case studies are presented which show the utility and advantages of this method over design methods currently being used. The types of actuators described and analyzed include bias spring actuators, differential force actuators, and their hybrid systems. The design approach includes coupling between the one-dimensional thermomechanical constitutive relations and a lumped capacitance tr

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8

Spaggiari, Andrea, and Eugenio Dragoni. "Modelling of Shape Memory Alloy Negator Springs for Long-Stroke Constant-Force Actuators." Advances in Science and Technology 78 (September 2012): 52–57. http://dx.doi.org/10.4028/www.scientific.net/ast.78.52.

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The paper deals with the analytical modelling of a shape memory alloy Negator spring. Negator springs are spiral springs made of strip metal wound on the flat with an inherent curvature such that, in repose, each coil wraps tightly on its inner neighbour. This configuration allows a constant force mechanical response and very long strokes, limited mainly from the total length of the spring. The authors investigate the behaviour of the spring made of a shape memory alloy (SMA). The intrinsic characteristic of SMA is to have two different elastic moduli at different temperatures. This difference

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9

Spaggiari, Andrea, Igor Spinella, and Eugenio Dragoni. "Design equations for binary shape memory actuators under arbitrary external forces." Journal of Intelligent Material Systems and Structures 24, no. 6 (2012): 682–94. http://dx.doi.org/10.1177/1045389x12444491.

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This article presents the design equations for an on–off shape memory alloy actuator working against an external system of arbitrary constant forces. A binary shape memory alloy actuator is considered where a cursor is moved against both conservative and dissipative forces, which may be different during the push or pull phase. Three cases are analysed and differentiated in the way the bias force is applied to the primary shape memory alloy spring: using a constant force, a conventional spring or a second shape memory alloy spring. Closed-form dimensionless design equations are developed, which

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10

Viet, NV, W. Zaki, R. Umer, and Y. Xu. "Mathematical model for superelastic shape memory alloy springs with large spring index." International Journal of Solids and Structures 185-186 (March 2020): 159–69. http://dx.doi.org/10.1016/j.ijsolstr.2019.08.022.

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11

Shang, Ze Jin, and Zhong Min Wang. "Nonlinear Forced Vibration for Shape Memory Alloy Spring Oscillator." Advanced Materials Research 250-253 (May 2011): 3958–64. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.3958.

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The recovery force of shape memory alloy spring is described by using polynomial constitutive equation. The nonlinear dynamic model of forced vibration for the shape memory alloy spring oscillator is derived. Numerical simulations are performed by a fourth-order Runge-Kutta method. The bifurcation diagram and Lyapunov-exponent spectrum are presented while the dimensionless temperature, the dimensionless damping coefficient or the dimensionless amplitude of exciting force is varied respectively, thus the bifurcation of the system is investigated. Furthermore, the periodic and chaotic motions of

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12

SATO, Shigemi, Toshio HAMANO, Shigeru KAWAGUCHI, and Seiichi SAITO. "Characteristic of coil spring of TiNi shape memory alloy." Transactions of Japan Society of Spring Engineers, no. 30 (1985): 25–32. http://dx.doi.org/10.5346/trbane.1985.25.

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13

Tobushi, H., Y. Ohashi, T. Hori, and H. Yamamoto. "Cyclic deformation of TiNi shape-memory alloy helical spring." Experimental Mechanics 32, no. 4 (1992): 304–8. http://dx.doi.org/10.1007/bf02325582.

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14

Pan, Chi Hsiang, and Ying Bin Wang. "Development of a Novel Micro-Actuator Driven by Shape Memory Alloy." Solid State Phenomena 164 (June 2010): 9–14. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.9.

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This paper presents a novel microactuator driven by shape memory alloy (SMA). First, the helical spring-shaped SMA is fabricated from SMA wire (Ti50%-Ni45%-Cu5%) with one way shape memory effect and 0.6 mm in diameter. Subsequently, a compliant tube-type microactuator driven by helical spring-shaped SMA is developed. The performances of the helical spring-shaped SMA and the compliant tube-type microactuator, such as the response time, the recovery force and the surface temperature in terms of the driving currents, are investigated. The driving circuit system comprising a pulse width modulation

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15

Zhang, Min, and Songjing Li. "Shape Memory Alloy(SMA) Actuated Microfluidic Colour-Changing System." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 38, no. 2 (2020): 377–83. http://dx.doi.org/10.1051/jnwpu/20203820377.

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In order to improve the performances of microfluidic actuators, a microfluidic actuating way based on the shape memory alloy(SMA) is presented, which is applied for the liquids circulation of a microfluidic colour-changing system. A SMA spring is used as the main actuating part, a microfluidic actuating device based on the SMA spring is designed and fabricated. The models for the SMA spring and the whole SMA actuated microfluidic system are established, the experimental platform is built. The temperature properties, output displacement performances and pressure responses of the present system

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16

Devashena, Thangaiyan, and K. Dhanalakshmi. "Electromagnetic Characteristics of Shape Memory Spring." Materials Science Forum 978 (February 2020): 421–27. http://dx.doi.org/10.4028/www.scientific.net/msf.978.421.

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Electric impedance is widely used in imaging and detection techniques. The applications range from non-destructive testing, structural health monitoring, and geophysical imaging to medical imaging. The frequency of the signal used for the measurement ranges from less than 1 Hz to about 1 GHz. This paper addresses the measurement and evaluation of the phase dependent electrical resistance, inductance, capacitance, and impedance of a shape memory alloy (SMA) spring (BMX 150, Toki Corporation). The material characteristics can be obtained by means of their electromechanical impedance. Experimenta

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17

Cheng, Shing Shin, Yeongjin Kim, and Jaydev P. Desai. "Modeling and characterization of shape memory alloy springs with water cooling strategy in a neurosurgical robot." Journal of Intelligent Material Systems and Structures 28, no. 16 (2017): 2167–83. http://dx.doi.org/10.1177/1045389x16685443.

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Since shape memory alloy has a high power density and is magnetic resonance imaging compatible, it has been chosen as the actuator for the meso-scale minimally invasive neurosurgical intracranial robot (MINIR-II) that is envisioned to be operated under continuous magnetic resonance imaging guidance. We have devised a water cooling strategy to improve its actuation frequency by threading a silicone tube through the spring coils to form a compact cooling module-integrated actuator. To create active bi-directional motion in each robot joint, we configured the shape memory alloy springs in an anta

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18

Enemark, Søren, Ilmar F. Santos, and Marcelo A. Savi. "Modelling, characterisation and uncertainties of stabilised pseudoelastic shape memory alloy helical springs." Journal of Intelligent Material Systems and Structures 27, no. 20 (2016): 2721–43. http://dx.doi.org/10.1177/1045389x16635845.

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The thermo-mechanical behaviour of pseudoelastic shape memory alloy helical springs is of concern discussing stabilised and cyclic responses. Constitutive description of the shape memory alloy is based on the framework developed by Lagoudas and co-workers incorporating two modifications related to hardening and sub-loop functions designated by Bézier curves. The spring model takes into account both bending and torsion of the spring wire, thus representing geometrical non-linearities. Simplified models are explored showing that a single point in the wire cross section is enough to represent the

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19

Kumar, M. Senthil, V. Raj Kumar, and S. Shyamkirthi. "Shape Memory Alloy Based Actively Tuned Undamped Mass Absorber." International Journal of Manufacturing, Materials, and Mechanical Engineering 2, no. 1 (2012): 66–74. http://dx.doi.org/10.4018/ijmmme.2012010105.

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An actively tuned undamped mass vibration absorber (ATVA) based on shape memory alloy (SMA) actuator is developed for attenuation of vibration in a cantilever beam. The design procedure of the ATVA is presented. The system consists of a cantilever beam mounted with shaker to generate the real-time vibration. The SMA spring with mass is attached at free end. The stiffness of SMA spring is varied dynamically in such a way to attenuate the vibration actively. Both simulation and experimentation are carried out. Simulation is carried out using Finite Element Analysis (FEA) package ANSYS software.

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20

Kęcik, Krzysztof. "Application Of Shape Memory Alloy In Harvesto-Absorber System." Acta Mechanica et Automatica 9, no. 3 (2015): 155–60. http://dx.doi.org/10.1515/ama-2015-0026.

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Abstract This paper presents a conception of the harvester-absorber system consisting of two parts. The first is the pendulum attached to the main system (oscillator), which is suspended on the linear damper and the nonlinear spring made of shape memory alloy. The spring is modelled as a polynomial function based on Landau–Ginzburg theory of phase transitions (similar as ferroelectric and ferromagnets). The obtained results show, that SMA element can increase harvesting energy level, while the absorber effect can be impaired (but not loss). Additionally, introducing SMA element causes changes

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21

Kolyvas, Efthymios, and Anthony Tzes. "Model based design of antagonistic shape memory alloy spring devices." Journal of Intelligent Material Systems and Structures 29, no. 12 (2018): 2619–40. http://dx.doi.org/10.1177/1045389x18770880.

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Shape memory alloy actuated devices employing a network of antagonistic components can reach an equilibrium of the internal forces by multiple sets of individual force magnitudes. In networks of star topologies particularly, the actuators are placed radially with one end connected at a common node. The ability to produce multiple sets of force equilibria suggests then that similar motions of the common node correspond to different thermomechanical paths. Two factors linked to this behavior are examined in this work, namely the initial design of the antagonistic system and the operational profi

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22

Khan, Esuff, and Sivakumar M. Srinivasan. "A New Approach to the Design of Helical Shape Memory Alloy Spring Actuators." Smart Materials Research 2011 (December 26, 2011): 1–5. http://dx.doi.org/10.1155/2011/167195.

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Shape memory alloys (SMAs) are smart materials that have the ability to recover their original shape by eliminating residual deformations, when subjected to adequate temperature rise (Shape memory effect). This special behavior attracts the use of SMAs as efficient stroke/force actuators. Most of the engineering applications require helical springs as actuators and proper design of SMA helical spring actuators is very important. In the traditional design approach of SMA spring (Waram, 1993), only strain between linear zones was considered in order to simplify the design and to improve the fati

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23

He, Jiazhen, Yehu Lu, Lijun Wang, and Nini Ma. "On the Improvement of Thermal Protection for Temperature-Responsive Protective Clothing Incorporated with Shape Memory Alloy." Materials 11, no. 10 (2018): 1932. http://dx.doi.org/10.3390/ma11101932.

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This study explored the application of shape memory alloy (SMA) springs in a multilayer protective fabric assembly for intelligent insulation that responded to thermal environment changes. Once the SMA spring was actuated, clothing layers were separated, creating an adjustable air gap between the adjacent fabric layers. The impacts of six different SMA arrangement modes and two different spring sizes on thermal protection against either a radiant heat exposure (12 kW/m2) or a hot surface exposure (400 °C) were investigated. The findings showed that the incorporation of SMA springs into the fab

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24

AOYAMA, Hitoshi, Koei GENBA, Yoshihisa OKAZAKI, and Yoshihiro HANAI. "The warm sagging of Ti-Ni shape memory alloy spring." Transactions of Japan Society of Spring Engineers, no. 35 (1990): 8–12. http://dx.doi.org/10.5346/trbane.1990.8.

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25

Cortez-Vega, R., I. Chairez, A. Luviano-Juárez, and V. Feliu-Batlle. "A hybrid dynamic model of shape memory alloy spring actuators." Measurement 114 (January 2018): 340–53. http://dx.doi.org/10.1016/j.measurement.2017.08.041.

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26

Namazu, Takahiro, Mamoru Komatsubara, Hiroyuki Nagasawa, Takahiro Miki, Takafumi Tsurui, and Shozo Inoue. "Titanium-Nickel Shape Memory Alloy Spring Actuator for Forward-Looking Active Catheter." Journal of Metallurgy 2011 (February 17, 2011): 1–9. http://dx.doi.org/10.1155/2011/685429.

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The fabrication and characterization of forward-looking active catheter actuated by titanium-nickel (Ti-Ni) shape memory alloy (SMA) springs are described. The catheter has been designed for wide-range observation of an affected area inside a blood vessel when the blood vessel is occluded. The developed active catheter consists of eight Ti-Ni SMA spring actuators for actuation of catheter tip, an ultrasonic transducer for forward-looking, a guide wire, a polyurethane tube for coating, and spiral wirings for realization of various flexure motions of catheter tip using Ti-Ni SMA actuators. The s

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27

Jafarzadeh, Siavash, and Mahmoud Kadkhodaei. "Finite element simulation of ferromagnetic shape memory alloys using a revised constitutive model." Journal of Intelligent Material Systems and Structures 28, no. 19 (2017): 2853–71. http://dx.doi.org/10.1177/1045389x17704064.

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In this article, a previously developed constitutive model for ferromagnetic shape memory alloys is phenomenologically enhanced using experimental observations. A modified phase diagram along with a method for calibration of the required model parameters is further presented. The model is implemented into a user material subroutine to equip commercial finite element software ABAQUS with the capability of simulating magneto-mechanical behaviors of ferromagnetic shape memory alloys. A combined convergence scheme is employed to solve the implicit equations. The proposed model together with the pr

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28

Keshtta, Alaa Mahmoud, and Mohamed Abdel Hady Gepreel. "Shape Memory Effect in New Ti-Nb-Ta Alloy." Materials Science Forum 889 (March 2017): 165–70. http://dx.doi.org/10.4028/www.scientific.net/msf.889.165.

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Recently, Ni-free shape memory Ti-based alloys (composed of the biocompatible β-stabilizing elements such as Ta and Nb) are extensively studied. In this work, new Ni-free Ti-17Nb-6Ta is presented as a candidate for shape memory alloys with high biocompatibility. This alloy produced using arc-melting in argon atmosphere, followed by solution annealing at 900° C for 30 min. β-phase is the predominant phase beside α” martensite phase. Stress induced martensitic transformation is observed after cold rolling and during bending tests as measured by XRD. The hardness of the bended wire in the solutio

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29

de Aguiar, Ricardo Alexandre Amar, Waldyr Cardoso de Castro Leão Neto, Marcelo Amorim Savi, and Pedro Manuel Calas Lopes Pacheco. "Shape Memory Alloy Helical Springs Performance: Modeling and Experimental Analysis." Materials Science Forum 758 (June 2013): 147–56. http://dx.doi.org/10.4028/www.scientific.net/msf.758.147.

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Shape memory alloys (SMAs) are metallic materials that have the capability to recover its original shape eliminating residual strains when subjected to adequate thermal process. This behavior is related to phase transformation induced either by stress or by. During the phase transformation process of an SMA component, large loads and/or displacements can be generated in a relatively short period of time making this component an interesting mechanical actuator. Because of such remarkable properties, SMAs have found a number of applications in different areas. The present contribution deals with

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30

Wang, Jun, Weihong Zhang, Jihong Zhu, Yingjie Xu, Xiaojun Gu, and Ziad Moumni. "Finite element simulation of thermomechanical training on functional stability of shape memory alloy wave spring actuator." Journal of Intelligent Material Systems and Structures 30, no. 8 (2019): 1239–51. http://dx.doi.org/10.1177/1045389x19831356.

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Pre-service thermomechanical training is of great significance to achieve functional stability for shape memory alloy device. This article presents a finite element simulation of the training behavior of a shape memory alloy wave spring actuator using a thermomechanically coupled and finite-strain shape memory alloy model (Wang et al., 2017a). The model is implemented into ABAQUS/Explicit by means of a user-defined material subroutine VUMAT. The introduction of a finite-Hencky-strain return-mapping integration scheme substantially improves the numerical efficiency and stability. Model predicti

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31

Simone, Filomena, Gianluca Rizzello, and Stefan Seelecke. "A finite element framework for a shape memory alloy actuated finger." Journal of Intelligent Material Systems and Structures 30, no. 14 (2019): 2052–64. http://dx.doi.org/10.1177/1045389x19861787.

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This article presents on finite element modeling of an artificial finger driven by shape memory alloy wires. These alloys appear as a promising transduction technology, due to their inherently high energy density which makes them a good choice for compact, lightweight, and silent actuator systems with many applications in the robotic field, ranging from industrial to biomedical ones. However, the complex nonlinear and hysteretic behavior of the material makes it difficult to accurately model and design shape memory alloy–actuated systems. The problem is even more challenging when shape memory

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32

Nalini, D., and K. Dhanalakshmi. "Synergistically configured shape memory alloy for variable stiffness translational actuation." Journal of Intelligent Material Systems and Structures 30, no. 6 (2019): 844–54. http://dx.doi.org/10.1177/1045389x19828487.

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The structural composition of two elastic elements, shape memory alloy wire (active actuating element) and spring (the passive bias), offers variable stiffness actuation. Based on this principle, a variable stiffness linear actuator is conceptually designed and developed. It is electromechanical by nature, that is, it is electrically activated and creates translational/linear motion. The variable stiffness linear actuator engages shape memory alloy wire(s) along with a passive compression spring to work synergistically. The biasing element offers recovery force to the shape memory alloy wire a

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33

Liu, Tian Qi, Shu Ping Chen, Jiang Long Guo, Zhi Long Dou, Chun Liu, and Qing Chun Zhang. "A Tetra-State Hopping Robot Driven by Shape Memory Alloy Spring." Advanced Engineering Forum 2-3 (December 2011): 402–7. http://dx.doi.org/10.4028/www.scientific.net/aef.2-3.402.

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According to the characteristics of jumping locomotion, a solution of Tetra-state Hopping Robot (for short: THR) actuated by Shape Memory Alloy Spring (for short: SMAS) is presented in this paper. This article establishes a mechanical model of the jumping robot and analyzes the kinematics and the dynamics of the mechanical model. Lagrange method is applied to analyze the dynamics the mechanical model. Meanwhile, a preliminary explanation of the THR flipping phenomenon during the take-off and flight process is conducted from the perspective of momentum moment.

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34

Wang, Z. G., X. T. Zu, X. D. Feng, et al. "Design of TiNi alloy two-way shape memory coil extension spring." Materials Science and Engineering: A 345, no. 1-2 (2003): 249–54. http://dx.doi.org/10.1016/s0921-5093(02)00474-4.

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35

ZHOU, Bo. "Mechanical Model for Super-elastic Helical Spring of Shape Memory Alloy." Journal of Mechanical Engineering 55, no. 8 (2019): 56. http://dx.doi.org/10.3901/jme.2019.08.056.

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36

Hasan, Nazmul, Hanseup Kim, and Carlos H. Mastrangelo. "Large aperture tunable-focus liquid lens using shape memory alloy spring." Optics Express 24, no. 12 (2016): 13334. http://dx.doi.org/10.1364/oe.24.013334.

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37

Park, Cheol Hoon, Kyung Jun Choi, and Young Su Son. "Shape Memory Alloy-Based Spring Bundle Actuator Controlled by Water Temperature." IEEE/ASME Transactions on Mechatronics 24, no. 4 (2019): 1798–807. http://dx.doi.org/10.1109/tmech.2019.2928881.

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Rehan, Muhammad, Ibrahim Al‐Bahadly, David G. Thomas, and Ebubekir Avci. "Capsule robot for gut microbiota sampling using shape memory alloy spring." International Journal of Medical Robotics and Computer Assisted Surgery 16, no. 5 (2020): 1–14. http://dx.doi.org/10.1002/rcs.2140.

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Lee, Hyo Jik, and Jung Ju Lee. "Evaluation of the characteristics of a shape memory alloy spring actuator." Smart Materials and Structures 9, no. 6 (2000): 817–23. http://dx.doi.org/10.1088/0964-1726/9/6/311.

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40

Mita, Toshihiro, Masaaki Misumi, and Masafumi Ohkubo. "Load-Elongation Characteristics of Ti-Ni Shape Memory Alloy Coil Spring." Transactions of the Japan Society of Mechanical Engineers Series A 61, no. 587 (1995): 1657–62. http://dx.doi.org/10.1299/kikaia.61.1657.

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41

STACHOWIAK, Dorota. "A computational and experimental study of shape memory alloy spring actuator." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 7 (2019): 31–34. http://dx.doi.org/10.15199/48.2019.07.07.

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42

Chen, Chi-Feng, Rui-Ting Zheng, Tsu-Te Kung, Chang-Neng Shauo, and Hsiou-Jeng Shy. "A strain-fiber actuator by use of shape memory alloy spring." Optik 120, no. 16 (2009): 818–23. http://dx.doi.org/10.1016/j.ijleo.2008.03.021.

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43

Rączka, Waldemar, Jarosław Konieczny, and Marek Sibielak. "Mathematical Model of a Shape Memory Alloy Spring Intended for Vibration Reduction Systems." Solid State Phenomena 177 (July 2011): 65–75. http://dx.doi.org/10.4028/www.scientific.net/ssp.177.65.

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The article discusses a prototype of a Shape Memory Alloy (SMA) spring intended for controlled vibration reduction systems. The spring has been subject to experiments and the article presents selected static and dynamic characteristics. The experiments were conducted at the Dynamics and Control of Structures Laboratory of the AGH University of Science and Technology. They permitted the formulation of a mathematical model for the SMA spring. The model takes into account the phenomena of energy accumulation and dissipation. The parameters of the spring model have been determined, based on the ex

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Jani, Jaronie Mohd, Martin Leary, and Aleksandar Subic. "Shape Memory Alloys in Automotive Applications." Applied Mechanics and Materials 663 (October 2014): 248–53. http://dx.doi.org/10.4028/www.scientific.net/amm.663.248.

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Shape memory alloy (SMA) actuators have drawn much attention and interest due to their unique and superior properties, and are expected to be equipped in many modern vehicles at competitive market prices. The key advantage is that SMA actuators do not require bulky and complicated mechanical design to function, where the active element (e.g. SMA wire or spring) can be deformed by applying minimal external force and will retain to their previous form when subjected to certain stimuli such as thermomechanical or magnetic changes. This paper describes the SMA attributes that make them ideally sui

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45

Liu, Yuping, Hongyang Wang, Canxing Qiu, and Xingnan Zhao. "Seismic Behavior of Superelastic Shape Memory Alloy Spring in Base Isolation System of Multi-Story Steel Frame." Materials 12, no. 6 (2019): 997. http://dx.doi.org/10.3390/ma12060997.

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Owing to excellent re-centering capability and good damping behavior, superelastic shape memory alloys (SMAs) are emerging as a potential new material to enhance the seismic resilience of civil structures. This paper focuses on using base isolation with SMA device for isolated structures. SMA springs are deemed to be promising candidate as the damper in the base isolation system, due to the compact form, damping contribution, restoring capability and flexible stiffness. This paper reported the concept of an innovative spring which is made of superelastic SMA wire. Then cyclic loading tests wer

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Protsenko, N. A., and Zhesfina Michailovna Blednova. "Structural-Mechanical Control of Bypass Reactivity in LISB for Space Application Using Alloys with Shape Memory Alloys." Materials Science Forum 738-739 (January 2013): 601–6. http://dx.doi.org/10.4028/www.scientific.net/msf.738-739.601.

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Keywords: Lithium-ion storage battery (LISB), bypass device, shape memory effect (SME) thermal treatment, reactivity, reliability Abstract. Deformation and strength characteristics of a thermal drive spring made of alloy with shape memory effect (SME) оn the base of TiNi in bypass device (BD) of Lithium-ion storage battery (LISB) for space application were investigated. A technique was developed for this spring thermal preparation for a certain magnitude of shape memory deformation, due to which during reverse martensite transformation a spring generates reactive force, sufficient for BD opera

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Hu, Jong Wan, Dong Keon Kim, and Eunsoo Choi. "Numerical investigation on the cyclic behavior of smart recentering clip-angle connections with superelastic shape memory alloy fasteners." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 6 (2012): 1315–27. http://dx.doi.org/10.1177/0954406212459008.

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Superelastic shape memory alloy materials have become increasingly prevalent for recentering devices that have the ability to recover their plastic deformation automatically. For this reason, this study proposed new clip-angle connections incorporating superelastic shape memory alloy bolts. Including component spring models, mechanical joint models of steel bolted connections and shape memory alloy bolted connections are created for numerically simulating their cyclic behavior. The numerical analysis results are then compared to each other in terms of ultimate strength, energy dissipation, and

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Utter, Brent. "Enhancing the actuation frequency of shape memory alloy wire by vibration-enhanced cooling." Journal of Intelligent Material Systems and Structures 30, no. 20 (2019): 3177–89. http://dx.doi.org/10.1177/1045389x19880015.

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Shape memory alloy wire actuators are lightweight, compact, and have high actuation stress, but their actuation frequency is limited by the rate they can be thermally cycled. Heating time can be reduced with high current, but rapidly cooling the material without introducing disadvantages is a challenge. This study establishes the feasibility of a novel approach to more rapidly cool shape memory alloy wires based on inducing their first mode of vibration. To achieve this, a steel spring pin placed on the wire was driven by an electromagnet as the shape memory alloy cooled. Experiments were cond

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Ma, Jianzuo, Hongyu Shu, and Jin Huang. "MR Continuously Variable Transmission Driven by SMA for Centrifugal Fan in Nuclear Power Plant." Science and Technology of Nuclear Installations 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/205675.

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The running efficiency of centrifugal fan affects the economical efficiency of the ventilation system. In this paper, we proposed a continuously variable transmission system based on magnetorheological fluid and shape memory alloy for improving the operating efficiency of the centrifugal fan. The equation of transmission torque developed by magnetorheological fluid is derived to compute the torque transmission ability in the continuously variable transmission system. A shape memory alloy spring actuator is designed to control the electric current in coil assembly. The results indicate that the

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Muralidharan, M., and I. A. Palani. "Development of Subcarangiform Bionic Robotic Fish Propelled by Shape Memory Alloy Actuators." Defence Science Journal 71, no. 1 (2021): 94–101. http://dx.doi.org/10.14429/dsj.71.15777.

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In this paper, a shape memory alloy (SMA) actuated subcarangiform robotic fish has been demonstrated using a spring based propulsion mechanism. The bionic robotic fish developed using SMA spring actuators and light weight 3D printed components can be employed for under water applications. The proposed SMA spring-based design without conventional motor and other rotary actuators was able to achieve two-way shape memory effect and has reproduced the subcarangiform locomotion pattern. The positional kinematic model has been developed and the dynamics of the proposed mechanism were analysed and si

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