Effective parameters of multilayered thermo-electro-magneto-elastic solids

Starkov, Ivan A.; Starkov, A. S.

doi:10.1016/j.ssc.2015.11.002

Cited by 19 publications

(6 citation statements)

References 14 publications

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“…Для объяснения влияния электрического поля на магнитные поведения композита, воспользуемся моделью, в которой тонкие пластинки, состоящие из нескольких слоёв мультиферроиков, могут быть заменены на одиночный эффективный слой [20]. Для этого слоя свободная энергия F может быть выбрана в виде…”

Section: результаты и обсуждениеunclassified

Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Амиров¹,

Starkov²,

Starkov³

et al. 2018

LoM

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A three-layer magnetoelectric composite PZT / FeRh / PZT consisting of a layer of a magnetic alloy Fe 49 Rh 51 and two layers of a piezoelectric lead zirconate PbZr 0.53 Ti 0.47 O 3 was fabricated and its magnetic properties were studied. The magnetic alloy Fe 49 Rh 51 from which the magnetic layer was made was obtained by induction melting from pure rhodium Rh (99.9 %) and iron Fe (99.98 %). An X-ray diffraction analysis of the alloy showed the predominance of a B2 type phase with a bcc structure with an impurity phase of type α' with a fcc structure. Elemental analysis confirmed the composition corresponding to Fe 49 Rh 51. Temperature dependences of magnetic susceptibility were measured in two regimes: with piezoelectric layers under voltage ("switch on") and without voltage ("switch off "). In the "switch off " regime a phase transition at 324 K in heating and at 315 K in cooling is observed that is different from the results for pure Fe 49 Rh 51. Application of a voltage to the opposite faces of the composite induces a mechanical stress on the magnetic layer that leads to a decrease in the magnetic susceptibility and shift of the transition temperatures to 320 K in heating and 316 K in cooling. Moreover, this mechanical stress changes the shape and area of the hysteresis, which can be used for control of magnetic properties of materials. The magnetic properties and temperature hysteresis with applied electric field have been theoretically considered and explained on the basis of the Landau-Khalatnikov equations.

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Section: результаты и обсуждениеunclassified

Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Амиров¹,

Starkov²,

Starkov³

et al. 2018

LoM

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“…The constitutive model for a linear thermo-magneto-electro-elastic material is given as 26 σij and ɛkl are the elastic stress and strain, Hk and Bi are the magnetic field and magnetic flux, Ek and Di are the electric field and electric displacement, respectively. The elastic stiffness tensor denoted by Cijkl is measured in constant electric and magnetic fields.…”

Section: Analysis and Model Developmentmentioning

confidence: 99%

Fully coupled thermo-magneto-electro-elastic properties of unidirectional smart composites with a piezoelectric interphase

Haghgoo

Ansari

Hassanzadeh-Aghdam

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present study, the effect of PZT-5A piezoelectric interphase on the effective thermo-magneto-electro-elastic properties of CoFe2O4 piezomagnetic matrix composites reinforced with carbon fibers is investigated. In this type of three-phase smart composite, the unidirectional fiber is coated with the piezoelectric shell. To this end, the fully coupled thermo-magneto-electro-elastic constitutive relations are developed for a unit cell-based micromechanical model in conjunction with a proper representative volume element. The influences of piezoelectric interphase thickness on the effective properties of the unidirectional smart composite are extensively investigated at different carbon fiber volume fractions up to 70%. The results demonstrate that piezoelectric interphase can greatly affect the overall thermo-magneto-electro-elastic properties of the smart composites. For two-phase smart composites, the present predictions are found to be in close proximity with the Mori–Tanaka results, which validates the present model.

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“…Hence, thermal energy is one of the most present and available forms of energy. Unfortunately, a signifcant fraction of the available thermal energy is always converted into dissipative heat [19][20][21][22]. Vehicles, factories, power plants, electronic devices, and even the human body waste thousands of joules of thermal energy.…”

Section: Introductionmentioning

confidence: 99%

Size-Dependent Thermoelastic Behavior Analysis of Functionally Graded Magneto-Electro-Elastic Cylindrical Shells Based on Modified Couple Stress Theory

Khazari

Mohammadi

Kheirikhah

2023

Advances in Materials Science and Engineering

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In this article, the influence of important parameters on the size-dependent thermoelastic behavior of functionally graded magneto-electro-thermo-elastic microcylinders (FGMEE) is studied by means of modified stress couple theory and under the influence of combined mechanical-thermal-magnetic loads. The equations of motion were derived by considering the linear behavior of the shells and considering the first-order theory of the nonlocal shear deformation of the shells. In the following, the results of solving the equations governing the buckle are analyzed. Based on this, firstly, the mechanical properties used in the shell are presented, then the linear buckling behavior is studied, and finally, the size-dependent buckling behavior of these structures is studied. In the presented results, the mode numbers of each buckling load are shown as n and m, where n and m represent the circumferential and longitudinal mode numbers, respectively. In the theory section, using the pairwise size-dependent theory, the stress is corrected, and considering the shell with a relatively thick geometric structure and the forces due to the heterogeneous thermal boundary conditions, a combination of convection heat transfer and displacement is used to obtain a three-dimensional shell temperature distribution. The equilibrium equations of the term electromagnetic coupling system are obtained using the first-order shear displacement field of the shell and the structural relationships in the functionally graded magneto-electro-thermo-elastic (FG-METE) intelligent material. Then, using appropriate analytical and numerical methods, various components of the displacement field, electrical and mechanical potential, and, most importantly, structural stresses for different boundary conditions are obtained.

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Effective parameters of multilayered thermo-electro-magneto-elastic solids

Cited by 19 publications

References 14 publications

Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Electric field controlled magnetic phase transition in Fe49Rh51 based magnetoelectric composites

Fully coupled thermo-magneto-electro-elastic properties of unidirectional smart composites with a piezoelectric interphase

Size-Dependent Thermoelastic Behavior Analysis of Functionally Graded Magneto-Electro-Elastic Cylindrical Shells Based on Modified Couple Stress Theory

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