• Nonlinear post-Buckling of thin fgm annular spherical shells under mechanical loads and resting on elastic foundationsNonlinear post-Buckling of thin fgm annular spherical shells under mechanical loads and resting on elastic foundations

    Due to practical importance of FGM annular spherical shells and the lack of investigations on stability of these structures, the present paper aims to propose an analytical approach to study the problem of nonlinear buckling and postbuckling of FGM thin annular spherical shells on elastic foundations. Based on the classical thin shell theory, the ...

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  • A cell-Based smoothed discrete shear gap method (cs-fem-dsg3) for dynamic response of laminated composite plate subjected to blast loadingA cell-Based smoothed discrete shear gap method (cs-fem-dsg3) for dynamic response of laminated composite plate subjected to blast loading

    In this paper, the cell-based smoothed discrete shear gap method (CS-FEM-DSG3) is extended to investigate the dynamic response of laminated composite plate under the effect of blast loading modeled by some trigonometric time functions. Numerical results demonstrate that the proposed method can achieve accurate results by using only a relative co...

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  • On the convergence of a coupling successive approximation method for solving duffing equationOn the convergence of a coupling successive approximation method for solving duffing equation

    Findings of the paper are summarized as follows: 1. The convergence of the coupling successive approximation method (CSAM) is proved for Eq. (1) without using the assumption of small parameters. 2. Condition of convergence is obtained as follows where θ is denoted by (14). 3. The proposed algorithm is applied to some examples to verify the met...

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  • Dynamic response of three dimension tunnel on elastic foundation subjected to moving vehicle loadsDynamic response of three dimension tunnel on elastic foundation subjected to moving vehicle loads

    This paper presented an algorithm of element finite method established for dynamic analysis of tunnel and foundation in space model subjected to moving loads of vehicle. Numerical investigation has been carried out for an example with different parameters and showed effects of parameters of structure and load to the dynamic response of tunnel-fou...

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  • On modelling and control design for self-Balanced two-wheel vehicleOn modelling and control design for self-Balanced two-wheel vehicle

    In this study, deriving the differential equations of motion of self-balanced two-wheel vehicle and designing a controller to maintain vehicle motion are presented. The method of substructures has been exploited successfully in establishing equations of motion of the vehicle. Because the system has two degrees of freedom but only one actuator, a...

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  • Thermal buckling of imperfect functionally graded cylindrical shells according to wan-Donnell modelThermal buckling of imperfect functionally graded cylindrical shells according to wan-Donnell model

    A thermal buckling analysis of imperfect circular cylindrical shells of functionally graded material is considered. The material properties are assumed varying as a power form of thickness coordinate variable. The Donnell equilibrium and stability equations are considered and the Wan-Donnell model for initial geometrical imperfection is adopted. ...

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  • Slip-Shakedown analysis and the assumption of small coupling in frictional contactSlip-Shakedown analysis and the assumption of small coupling in frictional contact

    In the considered problem, the dependence of the yield limit on the amplitude of the loading is not classical. Our discussion shows that well-known general theorems of shakedown analysis and of limit analysis remain available and that static and kinematic approaches can be applied within some minor modifications. New expressions of the critical ...

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  • Shakedown and collapse of elastic-Plastic structures under variable and cyclic loadsShakedown and collapse of elastic-Plastic structures under variable and cyclic loads

    The work is supported by the National Science Foundation of Vietnam. This is the content of a plenary report presented at the National Conference on Mechanics commemorizing the 30-th anniversary of the Institute of Mechanics and Vietnam Journal of Mechanics, Hanoi 8/4/2009

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  • Calculation of the wave parameters for sea dyke design and upgradingCalculation of the wave parameters for sea dyke design and upgrading

    In order to meet the need of the adequate wave input parameters at all and to fulfill the research task of the project “Determining the wave heights for sea dyke designed along the coastal line from Quang Ninh to Quang Nam” in particular, the authors have developed the SWAN model for storm and monsoon waves computation in the deep sea areas. For...

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  • Dynamic absorber for ropeway gondola using coriolis forceDynamic absorber for ropeway gondola using coriolis force

    In this paper, a passive absorber that uses Coriolies force to reduce vibration is introduced. This absorber moves in the radial direction of a swinging pendulum. Therefore, it has many differences with conventional absorbers that move in the circumference direction. For example, the relationship between the absorbers’ effectiveness and their loc...

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