Phase diagram kinetics for shape memory alloys: a robust finite element implementation

Gao, Xiujie; Qiao, Rui; Brinson, L. Catherine

doi:10.1088/0964-1726/16/6/013

Cited by 38 publications

(30 citation statements)

References 35 publications

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“…where G is shear elastic modulus, d and D represent the wire and spring diameter, repectively, N stands for spring number of coils and Ω includes the phase transformation contribution factor. For calculating the martensite fraction, Brinson’s generalized model (Gao et al, 2007) can be used, which is specifically made for SMA spring (Hadi et al, 2010, 2016). In this model, phase percentage can be extracted from the phase diagram.…”

Section: Dynamic Analysismentioning

confidence: 99%

Developing an adaptable pipe inspection robot using shape memory alloy actuators

Hadi

Hassani

Alipour

et al. 2020

Journal of Intelligent Material Systems and Structures

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To detect and repair the faults existing in pipes and narrow ducts in the industry, access to the inside of these pipes is often required. In this article, the conceptual design for a miniature robot for inspecting the inner walls of pipes is presented, such that the proposed robot can operate adaptably and freely in vertical, inclined, and bent paths. The robot utilizes a simple mechanism based on shape memory alloy actuators for adjusting the contact force between the robot and the inner wall of the pipe. Use of shape memory alloys as actuators for the adaptive part will result in a smaller and lighter robot, further increasing its mobility in narrower ducts. Modeling, simulation, and control of the proposed system is conducted and simulation results are validated by performing practical laboratory experiments on a built prototype.

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Section: Dynamic Analysismentioning

confidence: 99%

Developing an adaptable pipe inspection robot using shape memory alloy actuators

Hadi

Hassani

Alipour

et al. 2020

Journal of Intelligent Material Systems and Structures

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show abstract

“…Indeed, the main advantage of this approach is the simplicity of implementation in commercial codes, since it only requires defining temperature-dependent material properties, such as elastic modulus E and Coefficient of Thermal Expansion (CTE) α . However, in a more advanced design stage, detailed SMA constitutive models [ 135 , 136 , 137 , 138 , 139 ] must be used to assess the behavior of the SMA actuators.…”

Section: Numerical Simulationmentioning

confidence: 99%

Overview and Future Advanced Engineering Applications for Morphing Surfaces by Shape Memory Alloy Materials

Sellitto

Riccio

2019

Materials

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The development of structures able to autonomously change their characteristics in response to an external simulation is considered a promising research field. Indeed, these structures, called smart structures, can be adopted to improve the aerodynamic performance of air and land vehicles. In this work, an overview and future applications of Shape Memory Alloys (SMA)-based smart structures are presented. The use of SMA materials seems to be very promising in several engineering sectors. Advanced SMA-based devices, designed to improve the aerodynamic performance of vehicles by modifying the shape of the spoiler and the rear upper panel, are briefly introduced and discussed in this paper. Indeed, a simplified model simulating the SMA mechanical behavior has been considered to demonstrate the feasibility of the introduced smart structures for adaptive aerodynamic applications. Numerical simulations of the investigated structures are provided as a justification of the proposed designs.

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“…Several FEM implementations have been reported in literature characterizing the specific behavior of SMAs. [25][26][27][28][29] Most FEA are performed based on constitutive models that explain some unique behavior of SMAs. 25,[30][31][32][33][34][35][36][37] This paper presents the design, the finite element model of a newly developed SMA actuator and the necessary experiments conducted.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical investigation on active compliant joint made by shape memory alloy actuator

Katanchi

Fathi

Baghani

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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In this paper, a novel active compliant joint for robotic and microdisplacement applications is investigated numerically and experimentally. The proposed actuator structure is simple and possesses a higher energy density compared to the available actuators. Experimental tests are performed employing the shape memory behavior of NiTi alloy by the electric current as a heating source. To verify the actuator performance, numerical models are simulated in a nonlinear finite element program through employing a user subroutine according to experimental tests. Finite element implementation of the proposed actuator is performed based on the constitutive equations developed in Boyd–Lagoudas phenomenological model. Comparing the test and numerical results revealed that the numerical model is successful in predicting the actuator response. Finally, based on the verified numerical model, the effects of different parameters, e.g. the compression spring stiffness on the actuator performance are studied, and an optimal design for the actuator structure is proposed.

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Phase diagram kinetics for shape memory alloys: a robust finite element implementation

Cited by 38 publications

References 35 publications

Developing an adaptable pipe inspection robot using shape memory alloy actuators

Developing an adaptable pipe inspection robot using shape memory alloy actuators

Overview and Future Advanced Engineering Applications for Morphing Surfaces by Shape Memory Alloy Materials

An experimental and numerical investigation on active compliant joint made by shape memory alloy actuator

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