다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Assay for lipid peroxides in animal tissues by thiobarbituric acid reaction

Nonlinear Oscillations: Exact Solutions and their Approximations

A critical review of recent research on functionally graded plates

A nonlocal strain gradient theory for wave propagation analysis in temperature-dependent inhomogeneous nanoplates

Hygrothermal effects on vibration characteristics of viscoelastic FG nanobeams based on nonlocal strain gradient theory

Analytical investigation of the free vibration behavior of thin circular functionally graded (FG) plates integrated with two uniformly distributed actuator layers made of piezoelectric (PZT4) material based on the classical plate theory (CPT) is presented in this paper. The material properties of the FG substrate plate are assumed to be graded in the thickness direction according to the power-law distribution in terms of the volume fractions of the constituents and the distribution of electric potential field along the thickness direction of piezoelectric layers is simulated by a quadratic function. The differential equations of motion are solved analytically for clamped edge boundary condition of the plate. The detailed mathematical derivations are presented and numerical investigations are performed while the emphasis is placed on investigating the effect of varying the gradient index of FG plate on the free vibration characteristics of the structure. The results are verified by those obtained from three-dimensional finite element analyses.

An analytical study on the free vibration of smart circular thin FGM plate based on classical plate theory

In this paper, vibration characteristics of magneto-electro-thermo-elastic functionally graded (METE-FG) nanobeams is investigated in the framework of third order shear deformation theory. Magneto-electro-thermo-elastic properties of FG nanobeam are supposed to vary smoothly and continuously along the thickness based on power-law form. To capture the small size effects, Eringen’s nonlocal elasticity theory is adopted. By using the Hamilton’s principle, the nonlocal governing equations are derived and then solved analytically to obtain the natural frequencies of METE-FG nanobeams. The reliability of proposed model and analytical method in predicting natural frequencies of METE-FG nanobeam is evaluated with comparison to some cases in the literature. Numerical results are provided indicating the influences of several parameters including magnetic potential, external electric voltage, temperature fields, power-law exponent, nonlocal parameter and slenderness ratio on the frequencies of METE-FG nanobeams. It ...

Vibration analysis of smart piezoelectrically actuated nanobeams subjected to magneto-electrical field in thermal environment:

A nonlocal higher-order refined magneto-electro-viscoelastic beam model for dynamic analysis of smart nanostructures

Farzad Ebrahimi

Papers

A nonlocal strain gradient theory for wave propagation analysis in temperature-dependent inhomogeneous nanoplates

Hygrothermal effects on vibration characteristics of viscoelastic FG nanobeams based on nonlocal strain gradient theory

An analytical study on the free vibration of smart circular thin FGM plate based on classical plate theory

Vibration analysis of smart piezoelectrically actuated nanobeams subjected to magneto-electrical field in thermal environment:

A nonlocal higher-order refined magneto-electro-viscoelastic beam model for dynamic analysis of smart nanostructures