Analysis and Modeling of a Platform with Cantilever Beam using SMA Actuator - Experimental Tests based on Computer Supported Education

Abstract Many medical treatments such as brachytherapy, thermal ablation, and biopsy are performed using percutaneous needle-based procedures. The success of these procedures highly depends on accurate placement of the needle tip at target positions. A novel active needle was designed and developed in this work that can steer inside the tissue via a shape memory alloy (SMA) actuator attached to its body. With actuation and control offered by the actuator, the active needle can reach the target positions with more accuracy, and thereby potential improvement in clinical outcomes. An integrated system was also developed to robotically operate the active needle insertion. The performance of the active needle was evaluated with finite element methods and experimental tests on a fabricated prototype in air. Active needle insertion tests in a tissue phantom were also performed to evaluate the performance of the active needle. The deflection in air and tissue phantom demonstrated the capability of the active needle to reach target positions.

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Research of Piezoelectric Cantilever Beam Diaphragm Pump

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.397-400.483 ◽

2013 ◽

Vol 397-400 ◽

pp. 483-488

Author(s):

Hao Cai ◽

Liang Liang Wang ◽

Jing Shi Dong ◽

Yang Yang ◽

Feng Lin

Keyword(s):

Cantilever Beam ◽

Experimental Tests ◽

Input Voltage ◽

Maximum Displacement ◽

Diaphragm Pump ◽

Output Terminal ◽

Fea Model ◽

Piezoelectric Cantilever ◽

Resonance Frequencies ◽

Output Flow

The design in this paper is a rectangular piezoelectric vibrator driven Cantilever Beam Diaphragm Pump. By analyzing the working principle and characteristics of the piezoelectric cantilever beam pump, we developed the dynamics model and FEA model of the piezoelectric cantilever beam and optimized through tests the main factors that affect the output flow of the piezoelectric cantilever pump. Additionally, we designed the piezoelectric cantilever pump prototype, and by using an impedance analyzer, we measured the resonance frequencies of cantilever beams of different lengths; and we used the laser micrometer to test and measure the beams of different structures under loaded and unloaded condition. The maximum displacement of the output terminal of loaded cantilever beam is 50.5μm. Furthermore, through the experiments we tested the output flow and its corresponding variation under different diameters of transmission pistons and different excitation frequencies. Experimental tests show: when selecting the cantilever beam and the drive piston with optimal performance with the input voltage at 120V, and the frequency at 197Hz, the optimum output flow rate is 89ml/min.

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Sensor Monitoring in an Industrial Network - Experimental Tests for Computer Supported Education

Proceedings of the 6th International Conference on Computer Supported Education ◽

10.5220/0004930303740379 ◽

2014 ◽

Keyword(s):

Experimental Tests ◽

Industrial Network ◽

Supported Education ◽

Sensor Monitoring

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Active Vibration Control of a Double-Decker Cantilever Beam Using Shape Memory Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.226-228.252 ◽

2012 ◽

Vol 226-228 ◽

pp. 252-256

Author(s):

Xin Yang ◽

Jie Hong ◽

Yan Hong Ma ◽

Da Yi Zhang

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Cantilever Beam ◽

Active Vibration Control ◽

Vibrational Modes ◽

Vibrational Response ◽

Double Decker ◽

Active Vibration ◽

Sma Actuator ◽

Simulation Results

The feasibility of using shape memory alloy (SMA) as actuators to control the vibration of a double-decker cantilever beam is demonstrated in the paper. A new and reliable form of SMA actuator is proposed in this study that no debonding and softening occurs even the maximum shear is generated by recovery force of the SMA wires. The magnitude and stability of the recovery force are tested when the SMA wires with the prestrain are heated cyclically. According to the simulation results, the four vibrational modes (three bending and one torsional) of cantilever beam can be changed simultaneously. Finally the vibrational response excited by pulsing and sinusoidal signal is successfully suppressed by using the SMA actuators in the experiments.

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A Theoretical and Experimental Investigation on Free Vibration Vehavior of a Cantilever Beam with a Breathing Crack

Shock and Vibration ◽

10.1155/2012/563916 ◽

2012 ◽

Vol 19 (2) ◽

pp. 175-186 ◽

Cited By ~ 6

Author(s):

M. Rezaee ◽

H. Fekrmandi

Keyword(s):

Cantilever Beam ◽

Multiple Scales ◽

Correction Term ◽

Experimental Tests ◽

Analytical Relation ◽

System Response ◽

Breathing Crack ◽

Cracked Beam ◽

Lumped Parameter ◽

Intrinsic Nonlinearity

In this paper the free nonlinear vibration behavior of a cracked cantilever beam is investigated both theoretically and experimentally. For simplicity, the dynamic behavior of a cracked beam vibrating at its first mode is simulated using a simple single degree of freedom lumped parameter system. The time varying stiffness is modeled using a harmonic function. The governing equation of motion is solved by a perturbation method – the method of Multiple Scales.Results show that the correction term that is added to the main part of the response reflects the effect of breathing crack on the vibration response. Moreover, this part of response consists of the superharmonic components of the spectrum which is due to the system's intrinsic nonlinearity. Using this method an analytical relation is established between the system characteristics and the crack parameters in one hand and the nonlinear characteristics of system response on the other hand. Results have been validated by the experimental tests and a numerical method.

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Experimental characterization and validation of model for cantilever beam platform using SMA actuator

IEEE Latin America Transactions ◽

10.1109/tla.2022.9667152 ◽

2022 ◽

Vol 20 (3) ◽

pp. 519-525

Author(s):

Eisenhawer De Moura Fernandes ◽

Jose Sergio Da Rocha Neto ◽

Antonio Julio Santana Barroso

Keyword(s):

Cantilever Beam ◽

Experimental Characterization ◽

Sma Actuator

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Development of a Combined Micro-Macro Mechanics Analytical Approach to Design Shape Memory Alloy Spring-Based Actuators and Its Experimental Validation

Sensors ◽

10.3390/s21165506 ◽

2021 ◽

Vol 21 (16) ◽

pp. 5506

Author(s):

Aniello Riccio ◽

Carmine Napolitano ◽

Andrea Sellitto ◽

Valerio Acanfora ◽

Mauro Zarrelli

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Design Procedure ◽

Experimental Tests ◽

Analytical Models ◽

Preliminary Design ◽

Model Based ◽

Combined Use ◽

Spring System ◽

Sma Actuator

In this work, an analytical procedure for the preliminary design of shape memory alloy spring-based actuators is investigated. Two static analytical models are considered and interconnected in the frame of the proposed procedure. The first model, based on the works from An, is able to determine the material properties of the SMA components by means of experimental test data and is able to size the SMA component based on the requirements of the system. The second model, based on a work from Spaggiari, helps to design and size an antagonist spring system that allows one to obtain the geometric characteristics of springs (SMA and bias) and the mechanical characteristics of the entire actuator. The combined use of these models allows one to define and size a complex SMA actuator based on the actuation load requirements. To validate the design procedure, static experimental tests have been performed with the entire SMA actuator.

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Estimate of resistance-curve in wood through the double cantilever beam test

Holzforschung ◽

10.1515/hf.2010.010 ◽

2010 ◽

Vol 64 (1) ◽

Cited By ~ 14

Author(s):

Nuno M.M. Dourado ◽

Marcelo F.S.F. de Moura ◽

José J.L. Morais ◽

Manuel A.L. Silva

Keyword(s):

Fracture Energy ◽

Cantilever Beam ◽

Data Reduction ◽

Double Cantilever Beam ◽

Experimental Studies ◽

Experimental Tests ◽

Beam Test ◽

Element Analysis ◽

Double Cantilever Beam Test ◽

Good Agreement

Abstract Numerical and experimental studies involving the double cantilever beam test to estimate the resistance-curve under mode I loading in wood (Pinus pinaster Ait. – RL fracture system) are presented. Two data reduction schemes based on the specimen compliance and crack equivalent concept are proposed to obtain accurate values of fracture energy. The methods do not require crack length monitoring and mitigate the influence of scatter of wood elastic properties on the measured fracture energy. A finite element analysis to validate the proposed methodologies was performed. Good agreement was achieved in both cases, especially for one case. Experimental tests were also carried out to determine the fracture energy of this wood species. Application of both data reduction schemes provided consistent values.

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Flexural-Torsional Post Critical Behavior of a Cantilever Beam Dynamically Excited: Theoretical Model and Experimental Tests

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2003/vib-48597 ◽

2003 ◽

Cited By ~ 2

Author(s):

Daniele Zulli ◽

Rocco Alaggio ◽

Francesco Benedettini

Keyword(s):

Differential Equations ◽

Cantilever Beam ◽

Perturbation Technique ◽

Mass Matrix ◽

Dynamical Behavior ◽

Galerkin Approximation ◽

Experimental Tests ◽

Multiple Time Scales ◽

Multiple Time ◽

Vertical Force

The 3D dynamics of a cantilever beam undergoing large displacements under a sinusoidally varying, concentrated, vertical force at its free end are analyzed in this paper. The Partial Differential Equations (PDEs) of the motion are obtained by using the Principle of Virtual Power. Then a reduced 4 degrees-of-freedom model is obtained using, in a Galerkin approximation, four eigenfunctions of the linearized model. The obtained four Ordinary Differential Equations (ODEs) of the motion are expanded by means of a 3rd order Multiple Time Scales perturbation technique to obtain Amplitude and Phase Modulation Equations (APMEs). The role of the inertial-elastic nonlinear terms, responsible for the coupling of the mass matrix, and of the viscous-elastic nonlinear terms, both usually neglected in the literature, is discussed. A path following procedure applied to the APMEs is used to describe the global dynamical behavior in the plane of the excitation control parameters. The results obtained using the 4 d.o.f. analytical model are compared with those of an experimental aluminium model of the cantilever. The regions of instability of the 1-modal planar solution, in which the nonlinear modal coupling excites out of plane and/or torsional components, are studied.

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Amultilayered Solid Element used to Model Composite Delamination

Advanced Composites Letters ◽

10.1177/096369351001900103 ◽

2010 ◽

Vol 19 (1) ◽

pp. 096369351001900 ◽

Cited By ~ 1

Author(s):

I. Tawk ◽

J.-F. Ferrero ◽

J.-J. Barrau ◽

E. Abdullah ◽

M. Sudre

Keyword(s):

Cantilever Beam ◽

Double Cantilever Beam ◽

Experimental Tests ◽

Sensitivity Study ◽

Release Rates ◽

Gauss Point ◽

Model Composite ◽

Shell Elements ◽

Energy Release Rates ◽

Element Approach

This paper focuses on the latest development of a solid hexahedron element for composite delamination analysis. The 8-node solid is derived from a 20-node hexahedron. It is transformed into two physical independent 4-node shell elements according to the propagation of delamination process within the element. This transformation is driven by a transfer and damage laws that are defined by calibrating the element with a FE modeling for a double cantilever beam (DCB) test. According to the position of the crack in the element, one parameter defines the degradation of the transverse properties at the Gauss point as well as the transfer of the volume element towards the bi-plate formulation. A sensitivity study of the element is presented. A global-local finite element approach coupled with the traditional virtual crack closure technique (VCCT) method allows to calculate the energy release rates and to control the propagation of cracking in the element. This method is validated by comparison between conventional FE models and experimental tests [DCB, and end load split (ELS)]. Experimental asymmetric double cantilever beam (ADCB) test is carried out and modelled using the developed element. The numerical simulation properly correlates with the experimental results.

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