Study on dynamic stability of magneto-electro-thermo-elastic cylindrical nanoshells resting on Winkler–Pasternak elastic foundations using nonlocal strain gradient theory

Zhang, Fei; Bai, Chao; Wang, Jizhen

doi:10.1007/s40430-022-03930-z

Cited by 6 publications

(1 citation statement)

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“…Thermo-magneto-electro-elastic materials have been popularly used in microelectromechanical systems (MEMs) and nanoelectromechanical systems (NEMs) applications in recent years [1][2][3][4][5]. Since the mechanical properties of these materials may be affected by both magnetic and electric potential [6,7], they have great usage advantages in many applications such as micro and nano scale soft robotic actuator, wearable technology, nano drug transfer [8][9][10][11][12][13][14][15]. In the current investigation, the free vibration response of a nanobeam, which consists of ferroelectric (electroelastic) barium-titanate (BaTiO 3 ) and magneto strictive (magnetoelastic) cobalt-ferrite (CoFe 2 O 4 ) materials is modeled and analyzed by using first-order shear theory (FSDT) and nonlocal gradient strain theories.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Response of Smart Magneto-Electro-Elastic FGM Nanosensor Beams with Intended Porosity

Pehlivan,

Esen,

Aktas

2024

Arab J Sci Eng

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This study investigates the behavior of free vibrations in a variety of porous functionally graded nanobeams composed of ferroelectric barium-titanate (BaTiO3) and magnetostrictive cobalt-ferrite (CoFe2O4). There are four different models of porous nanobeams: the uniform porosity model (UPM), the symmetric porosity model (SPM), the porosity concentrated in the bottom region model (BPM), and the porosity concentrated in the top region model (TPM). The nanobeam constitutive equation calculates strains based on various factors, including classical mechanical stress, thermal expansion, magnetostrictive and electroelastic properties, and nonlocal elasticity. The study investigated the effects of various factors on the free vibration of nanobeams, including thermal stress, thermo-magneto-electroelastic coupling, electric and magnetic field potential, nonlocal features, porosity models, and changes in porosity volume. The temperature-dependent mechanical properties of BaTiO3 and CoFe2O4 have been recently explored in the literature for the first time. The dynamics of nanosensor beams are greatly influenced by temperature-dependent characteristics. As the ratios of CoFe2O4 and BaTiO3 in the nanobeam decrease, the dimensionless frequencies decrease and increase, respectively, based on the material grading index. The dimensionless frequencies were influenced by the nonlocal parameter, external electric potential, and temperature, causing them to rise. On the other hand, the slenderness ratio and external magnetic potential caused the frequencies to drop. The porosity volume ratio has different effects on frequencies depending on the porosity model.

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