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The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are:
- Physics and mechanics of electromagnetic materials and devices
- Computational electromagnetic in materials and devices
- Applications of electromagnetic fields and forces
The three interrelated key subjects - materials, electromagnetics and mechanics - include the following aspects: control, micromachines, intelligent structure, inverse problem, eddy current analysis, electromagnetic NDE, magnetic materials, magnetoelastic effects in materials, bioelectromagnetics, magnetosolid mechanics, magnetic levitations, applied physics of superconductors, superconducting magnet technology, superconducting propulsion system, nuclear fusion reactor components and wave propagation in electromagnetic fields.
Article Type: Editorial
Abstract: Preface to the Proceedings from the 16th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2013) special issue.
DOI: 10.3233/JAE-141805
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 1-2, 2014
Authors: Liang, Ruquan | Yang, Shuo | Yan, Fusheng
Article Type: Research Article
Abstract: A mathematical model is developed with an interest to examine the effects of the transverse magnetic field on the thermocapillary convection in a liquid bridge of silicon-oil-based ferrofluid under zero gravity. The mass conservation level set method is used to capture the motion of the free surface. The obvious effects of the transverse magnetic field on the flow and temperature distributions as well as surface deformation are detected. The transverse magnetic field affects not only the …velocity level inside the liquid bridge but also the velocity level on the free surface. Moreover, the present results prove that it is necessary to take the surface deformation into account in the study on the thermocapillary convection. Show more
Keywords: Thermocapillary convection, transverse magnetic field, high Pr number fluid, level set method
DOI: 10.3233/JAE-141806
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 3-10, 2014
Authors: Gen, Ge | Zhu, ZhiWen | Xu, Jia
Article Type: Research Article
Abstract: One buckled simply supported giant magnetostrictive material (GMM) thin film laminated beam model subject to axial magnetic excitations is proposed. The magnetostrictive force is simplified as a harmonic excitation. Applying the Hamilton principle and Galerkin approach the model is expressed as a one dimensional vibrating model with parametrical excitation. The multi-scales method is used to obtain the approximation of the solution when the vibration is around the buckled position and the amplitude of the …oscillation is small. With the help of the undermined fundamental frequency method and normal form theory the Melnikov approach is improved to calculate more precise threshold value of the amplitude of excitation leading to chaos. The numerical simulation shows the performance of the new Melnikov approach is much better than the traditional way. Show more
Keywords: GMM film, nonlinear, buckled beam, chaos
DOI: 10.3233/JAE-141807
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 11-20, 2014
Authors: Nishimura, Yoshihiro | Suzuki, Takayuki | Fukuda, Katsumi | Fukuta, Masatoshi
Article Type: Research Article
Abstract: Ultrasonic Systems are useful for inspecting ceramic materials because ultrasonic waves are easily propagated in such materials. Conventional ultrasonic testing (UT) methods cannot easily identify internal defects. This study built a visualization system for detecting and reconstructing internal defect images using probe array UT. Internal defect images were reconstructed by applying truncated singular value decomposition. We investigated how the sampling frequency and truncation index affect the reconstructed defect images.
Keywords: UT probe array, defects, ultrasound, inverse problem, truncated singular value problem
DOI: 10.3233/JAE-141808
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 21-26, 2014
Authors: Chen, Luqi | Zhang, Ping | Yu, Kui | Sun, Qing
Article Type: Research Article
Abstract: The primary objectives of this work are about the experimental study on the nonlinear electromechanical behaviour of the macro fiber composite (MFC), and to analyse the affecting factors of the inconstant parameters d33 and d31 which can arouse nonlinearities of MFC. Both longitudinal and transverse output strains are measured by actuating the MFC specimen under different DC voltages and a range of peak-to-peak sinusoidal voltages (VPP) at various frequencies, which can investigate how the voltage amplitude …and frequency affect nonlinear hysteretic behavior. The experimental results of both DC voltages and AC voltages indicate that the relationship of the applied voltage and output strain displays nonlinear hysteretic behavior. The responses of the AC voltages also indicate that hysteresis nonlinearity behaviour of the MFC actuator is sensitive to the varying voltage amplitude and frequency. The higher the voltage and frequency are, the more obvious the hysteresis phenomenon are. Show more
Keywords: Macro fiber composite, electromechanical behavior, nonlinear, dynamic, experiment study
DOI: 10.3233/JAE-141809
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 27-33, 2014
Authors: Zhu, Zhiwen | Zhang, Wendi | Xu, Jia
Article Type: Research Article
Abstract: Stochastic bifurcation characteristics and optimal control of giant magnetostrictive film (GMF)-shape memory alloy (SMA) composite plate subjected to in-plane stochastic excitation were studied in this paper. Nonlinear difference item was introduced to interpret the hysteretic phenomena of both GMF and SMA, and then the nonlinear dynamic model of GMF-SMA composite plate subjected to in-plane stochastic excitation was developed. The stochastic stability of the system was analyzed, and the condition of stochastic Hopf …bifurcation was discussed. The reliability function of the system was solved from backward Kolmogorov equation, and then the probability density of the first-passage time was obtained. Finally, the stochastic optimal control strategy was obtained in stochastic dynamic programming method. Numerical simulation shows that the stability of the trivial solution varies with bifurcation parameters, and stochastic Hopf bifurcation appears in the process; the reliability of the system is improved by stochastic optimal control, and the first-passage time is delayed. GMF-SMA composite plate combines the advantages of both GMF and SMA, and can reduce vibration through passive control and active control effectively. The results of this paper are helpful to application of GMF-SMA composite plate in engineering fields. Show more
Keywords: Giant magnetostrictive film, shape memory alloy, stochastic bifurcation, optimal control, reliability
DOI: 10.3233/JAE-141810
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 35-43, 2014
Authors: Kinoshita, Katsuyuki | Nakazaki, Ryo | Matsumoto, Eiji
Article Type: Research Article
Abstract: In order to be able to develop a deterioration sensor based on the inherent magnetic phase in type 304 stainless steel (SUS304 steel), the relationships between the magnetic properties of SUS304 steel and the martensite structure induced in it by tensile deformation were investigated using the electromagnetic impedance (EMI) method, optical microscopy, and the equivalent inclusion method. The results showed that the martensite fraction and internal stress had the greatest effect on the magnetic properties of …SUS304 steel in the low tensile strain range. On the other hand, in the high tensile strain region, the changes in the shape and orientation of the martensite particles owing to tensile deformation had the most significant effect on the magnetic properties of SUS304 steel. Show more
Keywords: Austenitic stainless steel, nondestructive evaluation method, equivalent inclusion method, tensile deformation
DOI: 10.3233/JAE-141811
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 45-52, 2014
Authors: Luo, Jinglin | Li, Hao | Yan, Guirong | Hu, Junwen
Article Type: Research Article
Abstract: In this paper, an electrodynamic vibration suppressor is proposed that can be used to suppress the main component of structural vibrations. This suppressor includes three main parts: an electrodynamic actuator, a power amplifier and a vibration controller. The intrinsic characteristics of the electrodynamic actuator were studied. After proposing a variable-step feedback harmonic cancellation algorithm, a controller was developed on the basis of this algorithm. To verify the effects of the suppressor, an experiment was …conducted on a slender cylinder shell. The results show that the vibration was reduced by approximately 73%. Show more
Keywords: Electrodynamic vibration suppressor, variable-step, feedback harmonic cancellation
DOI: 10.3233/JAE-141812
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 53-59, 2014
Authors: Sudo, Seiichi | Takamatsu, Hiroki | Yano, Tetsuya | Takana, Hidemasa | Nishiyama, Hideya
Article Type: Research Article
Abstract: Experimental study on the dynamic behaviour of magnetic fluid micro bridges under the effect of static and alternating magnetic fields was conducted using a high-speed video camera system. Two needle-shaped NdFeB permanent magnets were used to generate the static magnetic field, and Helmholtz coil was used to generate alternating field. Harmonic motion of magnetic fluid bridge was observed. It was found that the amplitude in the vibration of magnetic fluid bridge depends on the strength of …alternating magnetic field at the constant frequency. Phenomena of filament thinning and breakup in a capillary bridge of magnetic fluid under the alternating magnetic fields were revealed. Show more
Keywords: Magnetic fluids, liquid bridge, permanent magnet, alternating magnetic field
DOI: 10.3233/JAE-141813
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 61-67, 2014
Authors: Wu, Yongxiang | Yang, Baokun | Liu, Zhen | Wang, Cheng | Dong, Longlei
Article Type: Research Article
Abstract: In combining infrared (IR) thermography and the finite element method (FEM), a method is proposed for electromagnetic-thermal coupling analysis of an electromagnetic shaker armature assembly. IR thermography is used to obtain the temperature field of the armature assembly. Based on the lumped capacitance principle, this temperature field is then used to determine local convective heat transfer coefficients. FEM analysis of electromagnetic-thermal coupling is then performed using the obtained coefficients. The validity of …this method is demonstrated by comparing measured and calculated transient temperature fields. Show more
Keywords: Infrared thermography, electromagnetic shaker, local convective heat transfer coefficient
DOI: 10.3233/JAE-141814
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 69-74, 2014
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