Thermoelectric control of shape memory alloy microactuators: a thermal model

Abadie, Joël; Chaillet, Nicolas; Lexcellent, Christian; Bourjault, A.

doi:10.1117/12.350124

Cited by 12 publications

(7 citation statements)

References 6 publications

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“…In this case, the thermoelectric connections are directly made on the SMA element. A thermal model has already been validated by an experimental thermoelectric system which is described in a previous paper (Abadie et al, 1999). The development of a basic thermoelectric actuator in our laboratory has demonstrate the interest of the Peltier effect in temperature control of NiTi (Abadie et al, 2002).…”

Section: Introductionmentioning

confidence: 93%

Modeling of a New Sma Microactuator for Active Endoscopy Applications

Abadie

Chaillet

Lexcellent

2006

IFAC Proceedings Volumes

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Shape Memory Alloys (SMA) are good candidates to actuate endoscope heads but the cooling problem must be solved particularly in confined situations. For these reasons, a new SMA micro-actuator specially designed for active endoscopy applications has been developed in our laboratory. This work is a new step in the approach of using integrated thermoelectric cooling with SMA actuators. In fact, the Peltier effect is very attractive in such a case because this reversible phenomenon reduces the overheating of the external environment and provides forced cooling that decreases the response time. In this paper the actuator design and its working principle are presented. A fine modeling of the coupled mechanical and thermal behaviors gives a better understanding of the physical phenomenon involved in the actuator. Finally an experimental prototype has been developed and tested in order to verify the model predictions.

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Section: Introductionmentioning

confidence: 93%

Modeling of a New Sma Microactuator for Active Endoscopy Applications

Abadie

Chaillet

Lexcellent

2006

IFAC Proceedings Volumes

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“…The use of shape memory materials in microtechnological applications, where these materials have a great potential as parts of actuators and sensors, is often impeded by low dynamic responses, especially when an efficient cooling is important [1]. This is the case whenever the control of SMA phase transformations (and a subsequent mechanical power generation) is made by the temperature.…”

Section: Models For Sma-based Multilayered Thermoelectric Devices Andmentioning

confidence: 99%

“…In this way, SMA can be used for actuating purposes in shape and vibration control problems, as well as in applications ranging from various mechatronics products (e.g., flexible grippers for the assembly of tiny work pieces in the semiconductor industry and the sample collection for microscopic observations in the biochemical labs) to SMA actuators in the area of underwater vehicle design, artificial valves in bioengineering applications, etc. The modelling of thermoelectrically cooled/heated SMA actuators is typically limited in the literature to thermal analyses only (e.g., [1,5] and references therein) where the SMA module is described on the basis of the heat equations with different approximations for the internal heat productions. Such models cannot describe the dynamics of phase transitions that would require considering displacements coupled to temperature changes.…”

Section: Models For Sma-based Multilayered Thermoelectric Devices Andmentioning

confidence: 99%

Computational Models for Materials with Shape Memory: Towards a Systematic Description of Coupled Phenomena

Melnik

Roberts

2002

Lecture Notes in Computer Science

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In this paper we propose a systematic methodology for improving computational efficiency of models describing the dynamics of materials with memory as part of multilayered structures, in particular in thermoelectric shape memory alloys actuators. The approach, based on a combination of the centre manifold technique and computer algebra, is systematic in a sense that it allows us to derive computational models with arbitrary order of accuracy with respect to certain small parameters. Computational results demonstrating the efficiency of the proposed methodology in reproducing the dynamics of austeniticmartensitic phase transformations upon thermoelectric cooling are presented.

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“…In this case, the thermoelectric connections are directly realized on the SMA. A thermal model has already been validated by an experimental thermoelectric system (Abadie et al, 1999). Then, we have realized and tested an integrated SMA micro-actuator in two versions (Abadie et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Using a complete heat equation including Peltier effect or conduction terms does not change the thermomechanical behavior of the actuator blade and its resolution is more complicated. Solving the entire equation has already been performed by Abadie et al (1999). The focus of this paper is on the SMA blade bending.…”

Section: Introductionmentioning

confidence: 99%

Bending Model of an Integrated SMA Micro-Actuator

Abadie¹,

Chaillet

Lexcellent³

2004

Journal of Intelligent Material Systems and Structures

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In this paper, we give a model of a Shape Memory Alloy (SMA) thin blade working in bending. This work is based on the general study and modeling of an integrated SMA micro-actuator called the “ module”, controled by thermoelectric effect. This module was developed in two versions. The first one is composed of a NiTi thin blade on which are placed two copper elements which play the role of heat sinks. Its temperature is controlled by Joule effect. In the second version, Bismuth Telluride ingots are used instead of copper elements. This second configuration allows the temperature control of the SMA blade by Peltier effect. The model of the bending behavior is based on a general macroscopic description of the thermomechanical behavior of SMA. The self-accommodating (pure thermal effect) and oriented (stress-induced) martensites are taken into account. The thermal boundary conditions used in this paper correspond to the first version of the micro-actuator. The numerical resolution by finite differences leads to the comprehension of phase transformation for pseudo-elastic and thermal cycling bending tests.

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Thermoelectric control of shape memory alloy microactuators: a thermal model

Cited by 12 publications

References 6 publications

Modeling of a New Sma Microactuator for Active Endoscopy Applications

Modeling of a New Sma Microactuator for Active Endoscopy Applications

Computational Models for Materials with Shape Memory: Towards a Systematic Description of Coupled Phenomena

Bending Model of an Integrated SMA Micro-Actuator

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