scholarly journals Modeling and Experimental Research of One Kind of New Planar Vortex Actuator Based on Shape Memory Alloy

Actuators ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Xiangsen Kong ◽  
Yilei Gu ◽  
Jiajun Wu ◽  
Yang Yang ◽  
Xing Shen
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Mechanical Model ◽  
Angular Displacement ◽  
Complex Structure ◽  
Maximum Error ◽  
Coefficient Of Determination ◽  
Minimum Error ◽  
Output Torque ◽  
The Relationship

In order to alleviate the problems of complex structure and low reliability of traditional Shape Memory Alloy (SMA) rotary actuator, a planar vortex actuator (PVA) based on SMA material was proposed to directly output torque and angular displacement. Based on the calculation method of PVA and the constitutive model of the phase transition equation of SMA, the mechanical model is established, and the pre-tightening torque, temperature, output torque, and rotation angle are obtained. The relationship expression between the tests has verified the mechanical model. The results show that the relationship between the excitation temperature and the output torque, the coefficient of determination between the calculated value and the tested value, is 0.938, the minimum error is 0.46%, and the maximum error is 49.8%. In the relationship between angular displacement and torque, the coefficient of determination between the calculated value and the test value is 0.939, the maximum error is 58.5%, and the minimum error is 28.0%. The test results show that the calculated values of mechanical model and experimental data have similar representation form.

Mechanical Behaviors of Torsion Actuator of Shape Memory Alloy

2008 ◽  
Vol 385-387 ◽  
pp. 213-216 ◽  
Author(s):  
Bo Zhou ◽  
Zhen Qing Wang ◽  
Sung Ho Yoon ◽  
Guang Ping Zou
Keyword(s):  
Phase Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Mechanical Model ◽  
Solid Mechanics ◽  
Mechanical Behaviors ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Relationship Of ◽  
The Relationship

A shape memory alloy (SMA) torsion actuator is designed by using SMA wires and a thin-walled tube. A mechanical model, which predicts the thermo-mechanical behaviors of the SMA torsion actuator, is developed based on the knowledge of solid mechanics and constitutive relation of SMA. The relationship of the torsion-angle and temperature of the SMA torsion actuator is numerically described by using the mechanical model coupled with Tanaka’s, Liang’s and Zhou’s phase transformation models of SMA respectively. Results show the mechanical model well predict the thermo-mechanical behaviors of the SMA torsion actuator.

A thermo-mechanical model for shape memory alloy–based crank heat engines

2014 ◽  
Vol 26 (6) ◽  
pp. 652-662
Author(s):  
Fabrizio Niccoli ◽  
Carmine Maletta ◽  
Emanuele Sgambitterra ◽  
Franco Furgiuele
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Mechanical Model ◽  
Heat Engines

scholarly journals A Tetra-State Hopping Robot Driven by Shape Memory Alloy Spring

2011 ◽  
Vol 2-3 ◽  
pp. 402-407 ◽  
Author(s):  
Tian Qi Liu ◽  
Shu Ping Chen ◽  
Jiang Long Guo ◽  
Zhi Long Dou ◽  
Chun Liu ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Mechanical Model ◽  
Lagrange Method ◽  
Hopping Robot ◽  
Jumping Robot

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.

Experimental Study on Temperature External-Characteristics of Ni-Mn-Ga Shape Memory Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 1232-1236 ◽  
Author(s):  
Yong Zhi Cai
Keyword(s):  
Experimental Study ◽  
Critical Temperature ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Temperature Effect ◽  
Deformation Rate ◽  
Variable Temperature ◽  
Temperature Characteristics ◽  
The Relationship ◽  
External Characteristics

Temperature characteristics are essential to reasonable application of Ni-Mn-Ga alloy. This paper reports an experiment equipment which is used as the research of variable temperature effect. The relationship between deformation rate and temperature is studied. Dynamic and static experiments are done. The results show that critical temperature is around 40°C. It can be predicted that thermo-elasticity and magnetically-controlled characteristics will disappear with the increase of temperature.

NiTi Shape Memory Alloy Wire’s Constitutive Describe at Different Temperatures

2017 ◽  
Vol 729 ◽  
pp. 13-17
Author(s):  
Guang Yong Yang ◽  
Yang Zhong ◽  
Zhi Fei Qiu ◽  
Jun Wang ◽  
Wei Na Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Niti Shape Memory Alloy ◽  
Thermal And Mechanical Properties ◽  
Restoring Force ◽  
Intelligent Material ◽  
Different Temperatures ◽  
Relationship Of ◽  
The Relationship

NiTi shape memory alloy is an intelligent drive and awareness materials which develop very rapidly and is used in many fields in recent years, whose mechanical properties are not only related to chemical composition, but also closely related to the temperature. This article aims to study the NiTi shape memory alloy wire’s constitutive behavior coupled thermal and mechanical properties at different temperatures. By analyzing the results, the relationship of NiTi shape memory alloy between deformation and the restoring force at elevated temperature is obtained, thus providing a basis for the engineering design and simulation process of NiTi intelligent material.

scholarly journals Induction heating of a shape memory alloy beam

2018 ◽  
Vol 83 (3) ◽  
pp. 30905 ◽  
Author(s):  
S. Dufour ◽  
G. Vinsard
Keyword(s):  
Temperature Field ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Induction Heating ◽  
Mechanical Model ◽  
Eddy Currents ◽  
Shape Change ◽  
Nickel Titanium ◽  
Thin Shells ◽  
Induced Currents

The shape memory alloy heating by eddy currents is a quick solution for the shape change. Then, the analysis of the temperature field as a function of the shape is important to build a mechanical model in large deformation. Even if the temperature can be obtained by experiment, a computational model is useful. The computation of the induced currents in a nickel–titanium shape memory alloy beam is here considered with a T − Ω model adapted to thin shells with the help of a change of coordinates. It allows us to take into account the shape change, without the need of remeshing, as a function of the temperature. Experiments are carried out to validate the model.

Investigation on Mechanical Behaviors of Shape Memory Alloy Torsion Rod

2011 ◽  
Vol 179-180 ◽  
pp. 455-458
Author(s):  
Bo Zhou ◽  
Zhen Qing Wang ◽  
Yan Ju Liu ◽  
Jin Song Leng
Keyword(s):  
Phase Transformation ◽  
Constitutive Equation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensitic Phase Transformation ◽  
Mechanical Behaviors ◽  
Transformation Temperatures ◽  
Mechanics Of Materials ◽  
Niti Sma ◽  
The Relationship

DSC test is carried out to determine the phase transformation temperatures of a NiTi SMA, which include martensitic starting temperature, martensitic finishing temperature, austenitic starting temperature and austenitic finishing temperature. The mechanical behaviors of shape memory alloy (SMA) torsion rod are investigated by using Zhou’s shear constitutive equation of SMA and the theorem of circular shaft in mechanics of materials. A critical torque equation is developed to describe the relationship between the martensitic phase transformation critical torque of SMA torsion rod and temperature.

Sign in / Sign up

Export Citation Format

Share Document