• 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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  • Shear strengthening of reinforced concrete beams using epoxy bonded steel plates, cfrp sheets and externally anchored stirrupsShear strengthening of reinforced concrete beams using epoxy bonded steel plates, cfrp sheets and externally anchored stirrups

    Nghiên cứu này trình bày hiệu quả của các phương pháp gia tăng độ cứng chống trượt khác nhau sử dụng thép tấm dán bằng epoxy, các dải thép và các tấm nhựa gia cường bằng sợi carbon (CFRP) và neo bằng các nẹp ngoài để tạo ra độ bền chống trượt cho dầm bê tông cốt thép. Trong công trình này đã tiến hành chương trình thí nghiệm cho hai loạt mẫu với...

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  • An efficient numerical procedure for calculating periodic vibrations of elastic mechanismsAn efficient numerical procedure for calculating periodic vibrations of elastic mechanisms

    In this study, the problem on the calculation of steady-state periodic vibrations of elastic transmission mechanisms is addressed. The differential equations of motion of the mechanism is established and linearized to obtain a system of linear differential equations having time-varying coefficients, known as a parametric vibration system. A num...

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  • Turbulent burning velocity in combustion chamber of si engine fueled with compressed biogasTurbulent burning velocity in combustion chamber of si engine fueled with compressed biogas

    The results of this study allow us to draw the following conclusions: 1. The turbulent burning velocity coefficient of biogas-air mixture in the combustion chamber of a Honda Wave motorcycle engine fueled with compressed biogas containing 85% CH4 is approximately 1.3. 2. The indicated cycle work of a 110cc Honda Wave motorcycle engine reduces 28%...

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  • Inverse kinematics of a serial-Parallel robot used in hot forging processInverse kinematics of a serial-Parallel robot used in hot forging process

    The kinematical model of the serial-parallel robot is formulated. The kinematics equation of the considering robot must satisfy the constraint equation because of the motion constrained of the parallel links. This is different from the typical serial robot. The end-effector moves always parallel with the ground surface that could simplify the c...

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  • Improved estimates for the effective elastic bulk modulus of random tetragonal crystal aggregatesImproved estimates for the effective elastic bulk modulus of random tetragonal crystal aggregates

    In this paper we have derived explicit expressions of the general shape-unspecified upper and lower bounds on the effective elastic bulk modulus of random tetragonal crystal aggregates with numerical illustrations. The estimates are expected to predict the scatter range of the macroscopic elastic property of practical polycrystalline materials. On...

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  • Frequency response of a beam-Like structure to moving harmonic forcesFrequency response of a beam-Like structure to moving harmonic forces

    The moving load problem for a long time has attracted attention of researchers and engineers in the field of structural engineering and it is so far an actual topic in dynamics of structures. The fundamentals of the problem were formulated in [1–5] and intensively studied in the widespread literature, for example, the references [6–11]. In the m...

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  • An analytic homogenization model in traction and bending for orthotropic composite plates with the type of double corrugated cardboardAn analytic homogenization model in traction and bending for orthotropic composite plates with the type of double corrugated cardboard

    In this article, we have proposed an analytic homogenization model for the traction and flexion problem of double corrugated core cardboards. The comparison of the results obtained by the analytic formulas, by the Abaqus 3D simulations and by the AbaqusUgens 2D simulations has proved the validation of the present traction and flexion homogenizati...

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