The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform
Soniya Chaudhary - One of the best experts on this subject based on the ideXlab platform.
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Liouville-Green approximation: An analytical approach to study the elastic waves vibrations in composite structure of Piezo Material
Composite Structures, 2018Co-Authors: Abhinav Singhal, Sanjeev A Sahu, Soniya ChaudharyAbstract:This research article delves the study of surface waves in functionally graded Piezoelectric Material (FGPM) clubbed between two dissimilar Piezomagnetic (PM) media. The transference of elastic waves in a composite structure is analyzed following the elastic wave theory of magneto-electro-elasticity. Liouville-Green's (LG) approximation technique is used to solve the differential equation. The exponential variation is assumed in Material gradients of FGPM stratum. It is noticed that the frequency of considered wave depends significantly on the Material gradient coefficients, which may be a crucial factor to regulate the dispersion characteristics of functionally graded Material (FGM) waveguides. Frequency equations have been obtained for electrically open and short cases in determinant form. The profound effect of parameters like Material gradients (Piezoelectric, dielectric and elastic) and width of the layers, on the phase velocity of Love type wave are presented graphically. Moreover, it is noticed that the Material gradients also influences the electromechanical coupling factor. This influence has shown through the graph. Different parametric curves are merged into a single figure to increase the readability of the graphs. The magnetic potential function is derived analytically for all three gradient factors of FGPM plate. Obtained results are matched analytically and graphically with the established results.
Abhinav Singhal - One of the best experts on this subject based on the ideXlab platform.
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Liouville-Green approximation: An analytical approach to study the elastic waves vibrations in composite structure of Piezo Material
Composite Structures, 2018Co-Authors: Abhinav Singhal, Sanjeev A Sahu, Soniya ChaudharyAbstract:This research article delves the study of surface waves in functionally graded Piezoelectric Material (FGPM) clubbed between two dissimilar Piezomagnetic (PM) media. The transference of elastic waves in a composite structure is analyzed following the elastic wave theory of magneto-electro-elasticity. Liouville-Green's (LG) approximation technique is used to solve the differential equation. The exponential variation is assumed in Material gradients of FGPM stratum. It is noticed that the frequency of considered wave depends significantly on the Material gradient coefficients, which may be a crucial factor to regulate the dispersion characteristics of functionally graded Material (FGM) waveguides. Frequency equations have been obtained for electrically open and short cases in determinant form. The profound effect of parameters like Material gradients (Piezoelectric, dielectric and elastic) and width of the layers, on the phase velocity of Love type wave are presented graphically. Moreover, it is noticed that the Material gradients also influences the electromechanical coupling factor. This influence has shown through the graph. Different parametric curves are merged into a single figure to increase the readability of the graphs. The magnetic potential function is derived analytically for all three gradient factors of FGPM plate. Obtained results are matched analytically and graphically with the established results.
Sanjeev A Sahu - One of the best experts on this subject based on the ideXlab platform.
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Liouville-Green approximation: An analytical approach to study the elastic waves vibrations in composite structure of Piezo Material
Composite Structures, 2018Co-Authors: Abhinav Singhal, Sanjeev A Sahu, Soniya ChaudharyAbstract:This research article delves the study of surface waves in functionally graded Piezoelectric Material (FGPM) clubbed between two dissimilar Piezomagnetic (PM) media. The transference of elastic waves in a composite structure is analyzed following the elastic wave theory of magneto-electro-elasticity. Liouville-Green's (LG) approximation technique is used to solve the differential equation. The exponential variation is assumed in Material gradients of FGPM stratum. It is noticed that the frequency of considered wave depends significantly on the Material gradient coefficients, which may be a crucial factor to regulate the dispersion characteristics of functionally graded Material (FGM) waveguides. Frequency equations have been obtained for electrically open and short cases in determinant form. The profound effect of parameters like Material gradients (Piezoelectric, dielectric and elastic) and width of the layers, on the phase velocity of Love type wave are presented graphically. Moreover, it is noticed that the Material gradients also influences the electromechanical coupling factor. This influence has shown through the graph. Different parametric curves are merged into a single figure to increase the readability of the graphs. The magnetic potential function is derived analytically for all three gradient factors of FGPM plate. Obtained results are matched analytically and graphically with the established results.
November, Laurence J. - One of the best experts on this subject based on the ideXlab platform.
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Zero-Point Forces in Acoustic Waves
2019Co-Authors: November, Laurence J.Abstract:By the acousto-optic effect, an acoustic plane wave produces a 1D index-of-refraction or permittivity wave variation through a medium. But adjacent Material planes of alternating permittivity should interact due to the zero-point (ZP) field to produce internal forces, roughly like the Casimir effect in a stack of regularly spaced discrete conducting plates. The ZP force in a smoothly varying 1D permittivity wave is modeled and found to consist mainly of bulk repulsive and double-wavenumber harmonics. It is stronger than the Casimir ZP attractive force in the corresponding discrete alternating-layer stack at all physically meaningful repetition scales, extends to larger scales, falling off universally only as the inverse square of the wavelength, and shows no temperature sensitivity. Thus, at its extremes, a standing acoustic wave exhibits a bulk expansive ZP pressure through the Material volume, but as it passes through its null the ZP pressure vanishes, giving a body stress modulated at twice the acoustic wave frequency. But such repeated tensing in a Piezo Material is a usual energy-harvesting scenario, suggesting that ZP energy transfer may occur naturally with standing acoustic waves in a Piezo medium. A voltage effect is predicted for biphonon lattice vibrations in Piezo crystals with the possibility of 'crystal power', the extraction of electrical ZP energy across the crystal volume.Comment: 26 pages, 13 figure
Akihito Sano - One of the best experts on this subject based on the ideXlab platform.
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wearable skin vibration sensor using a pvdf film
World Haptics Conference, 2015Co-Authors: Yoshihiro Tanaka, Duy Phuong Nguyen, Tomohiro Fukuda, Akihito SanoAbstract:This paper aims to develop a wearable tactile sensor for measuring skin vibrations using a polyvinylidene fluoride (PVDF) film, which is a polymer Piezo Material. The sensor is worn on the finger pad where is remote from contact fingertip and detects skin-propagated vibrations when fingertip touches an object. The proposed sensor allows users to touch with bare fingers and to conduct active touch. A transfer function from vibrations applied on the fingertip to the sensor output is expressed by using a finger model, a sensor model, and an electric model of the PVDF film. On the basis of the transfer function, frequency response of the sensor is measured and estimation of vibrations is tested. Furthermore, the sensor output is investigated for three Materials with different textures. Results show the validity and availability of the sensor.