Search

The present article studies the two phase local/nonlocal deformation of magneto thermo electrical composite nano beam reinforced with graphene oxide powder (GOP). The controlling equation of motion and boundary conditions are derived via two phase elasticity in differential form conjunction with Hamilton's principle and Euler-Bernoulli beam model. The effect of a non-uniform magnetic and piezo electric field is incorporated with the governing equations by convoluting field quantities and displacement components. Then, Navier method is adopted to observe the influence of various boundary conditions on the dynamics of the beam. Comparison studies are performed to display the accuracy and efficiency of this analytical model. Further, the effects of magnetic field, GOP weight fraction, two phase parameter, external electric voltage, nonlocal parameter and temperature difference on the dimensionless frequency of GOP reinforced magneto piezo thermo elastic composite beams are thoroughly investigated and highlighted through tables and dispersion curves. [ABSTRACT FROM AUTHOR]

This composition presents a multi-phase-lags thermos-elasticity model for the thermos-elastic wave propagation reaction of a composite hollow circular cylinder with the interface layer LEMV/CFRP (Linear Elastic Material with void/Carbon Fiber Reinforced Polymer) using new modified couple stress theory. Three partial differential equations of the modified couple stress and multiphase lag model of composite hollow cylinder are derived for axisymmetric mode and solved exactly using linear theory of elasticity. The frequency equations are achieved for the traction free outer surface with continuity conditions at the interfaces. The influences of changing wave number and thickness on the field quantities like frequency, temperature, displacements, are investigated. Some comparisons are tabulated and presented graphically to estimate the effects of various thermos-elasticity theories and coupled stress parameter. [ABSTRACT FROM AUTHOR]

This study investigates the vibration of non-homogeneous porous Euler nanobeams, incorporating the governing equations of Eringen's nonlocal elasticity theory. To enhance computational efficiency in our analysis, we employ the Rayleigh-Ritz method, harnessing computationally efficient Bernstein polynomials as shape functions. Furthermore, we explore a range of classical boundary conditions tailored to address the specific problem at hand. In order to validate our findings, we conduct a comparative analysis against existing literature, thereby underscoring the effectiveness and robustness of our proposed methodology. Our research also places a significant emphasis on elucidating the impact of scaling parameters, dimensionless amplitude and porosity, on dimensionless frequency under various boundary conditions, including Simply-Supported (S-S), Clamped-Simply Supported(C-S), and Clamped-Clamped(C-C) configurations. [ABSTRACT FROM AUTHOR]

Persons with disability repeatedly report that inclusion is integral to a life that is well lived. Notions of inclusion often draw on understanding of exclusion and the need to address the barriers to inclusion. Many models of disability with reference to interventions that improve their dignity and standard of life varies from author to author or organization to organization. The foremost one is looking inclusion in terms of a rights based framework. This paves way for access to freedom, pursue priorities and participate in community activities. Civil, political and social rights, as a citizen, are to be enjoyed by a disabled person too. In Indian context, people with disabilities face many barriers in order to participate in all aspects of society. Persons with Disabilities do not enjoy access to society on an equal basis with others, including transportation, employment, education, justice and political participation. In this respect, the present research is proposed to evaluate the social work interventions that are currently underway in a proper perspective and design effective strategies concomitant with the desired goals for the betterment of the disabled. By conducting an intensive survey of 373 locomotor disabled in Coimbatore district, Tamil Nadu, the required information and data were collected and analysed by using a Structural Equation Model (SEM). The results revealed that the route to inclusion of locomotor disabled has to pass through four stages, to ensure their presence in the mainstream. [ABSTRACT FROM AUTHOR]

In India needs effective policies and programmes to address the increasing number of slums in the urban areas particularly in big cities, inadequate basic infrastructure and facilities, inadequate availability of protected water supply to the urban poor, and underlines the significance of urban development programmes. The present research analysed theoutcome of basic service to urban poor, from the perspectives of the beneficiaries, socioeconomic background of the beneficiaries of basic service to urban poor housing, and to suggest suitable social work interventions to improve their conditions. By conducting a survey 271 JNNURM Phase-1 beneficiaries in Coimbatore district, Tamil Nadu and proportionate in simple random strategy was adopted in selecting the samples from the population. This will help to evaluate the beneficiaries, whose housing condition was poorer before implementation of the basic service to urban poor, continue to experience lesser urban quality of life even after the implementation of the schemes. The independent samples t-tests were applied to tested hypothesis. The results revealed that there is statistically significant difference in the service to urban poor beneficiary respondents perceived lower levels of quality of life. However, point that is emphasised here is that the Social Work Intervention should at primary and secondary method of approach to improve the basic service to urban poor. [ABSTRACT FROM AUTHOR]

The present article express the magneto thermo electric deformation of composite nano fiber reinforced by graphene oxide powder (GOP). To reach the governing equation of the problem a higher-order trigonometric refined beam model is utilized according to Hamilton's principle. The effect of a nonuniform magnetic and thermo piezo electric field is applied to the governing equations by combining the field relations with the displacement field equations. Then, obtained equations are solved by using Galerkin's method to consider the influence of different boundary conditions on the vibrational responses of the fiber. The accuracy and efficiency of the presented model is verified by comparing the results with that of published researches. Further, the effects of different variant on the dimensionless frequency of GOP reinforced magneto piezo thermo elastic composite fibers are highlighted through tables and dispersion curves. The weight fraction of GOP and the magneto thermo electro effects have significant influence in the stiffness of the nano composites. [ABSTRACT FROM AUTHOR]

This study investigates that the sound wave propagation of multiferroic thermo elastic Nanofibers under the influence of surface effect and parametric excitation via Timoshenko form of beam equations. The equation of analytical model is obtained for Nanofiber through shear and rotation effect. The solution of the problem is reached through the coupled time harmonic equations in flexural direction. Graphs are drawn for frequency, phase velocity, piezoelectric strain, magnetic field and dynamic displacement at different vibration modes of Nanofibers. From the result obtained, it is seen that the surface effect and excitation frequency gives significant contribution to the physical variables of the Nanofiber. The frequency grows in the presence of surface effect and decay as length increases both in Euler's and Timoshenko beam theory. Also, a comparison of numerical results is made with existing literature and good agreement is arrived. The present study is expected to be more helpful for the design of piezo-thermomagneto- mechanical Nanofiber-based devices. [ABSTRACT FROM AUTHOR]

In this article, the influence of hydrostatic stress and gravity on a clamped- free non-homogeneous magneto electro elastic plate of polygonal cross sections is studied using linear theory of elasticity. The equations of motion based on two-dimensional theory of elasticity are applied under the plane strain assumption of pre-stressed and gravitated magneto electro elastic plate of polygonal cross-sections composed of non-homogeneous isotropic material. The frequency equations are obtained by satisfying the boundary conditions along the irregular surface of the polygonal plate using Fourier expansion collocation method. The complex roots of the frequency equations are obtained by secant method. The numerical computations are carried out for triangular, square, pentagon and hexagon cross sectional plates. Graphical representation is given for the various physical variables via gravity and different edge boundaries and its characteristics are discussed. This result can be applied for optimum design of concrete plates with polygonal cross sections. [ABSTRACT FROM AUTHOR]

In this work, the nonlocal elastic waves in a fluid conveying armchair thermo elastic single walled carbon nanotube under moving harmonic load is studied using Eringen nonlocal elasticity theory via Euler Bernoulli beam equation. The governing equations that contains partial differential equations for single walled carbon nanotube is derived by considering thermal and Lorenz magnetic force. The small scale interactions induced by the nano tubes are simulated by the non-local effects. The time domain responses are obtained by using both modal super position method and Newmarks's direct integration method. The effect of nonlocal parameter, thermal load, magnetic field of the moving harmonic load on the dynamic displacement of SWCNT is discussed. The results obtained show that the dynamic displacement of fluid conveying SWCNT ratio is significantly affected by the load velocity and the excitation frequency. This type of results presented here, will provide useful information for researchers in structural nano science to understand the small scale response of elastic waves coupled with thermo elasticity and some field forces. [ABSTRACT FROM AUTHOR]

Mathematical modeling of axisymmetric waves in a piezoelectric fiber of circular cross section coated with thin film is studied using three-dimensional theory of piezoelectricity. Potential functions are introduced to uncouple the equations of motion, electric conduction equations. The surface area of the fiber is coated by a perfectly conducting gold material. The frequency equations are obtained for longitudinal and flexural modes of vibration and are studied numerically for PZT-4 ceramic fiber. The computed nondimensional frequencies and attenuation for fiber with and without coating are presented in the form of dispersion curves. [ABSTRACT FROM AUTHOR]