TAILIEUCHUNG - Non-linear dynamical analysis of laminated reinforced composite doubly curved shallow shells

The present paper deals with a non-linear dynamical analysis of laminated reinforced composite doubly curved shallow shells. The motion equations of shell based upon the thin shell theory considering the geometrical non- linearity and the Lekhnitsky 's smeared stiffeners technique. Simultaneous ordinary differential equations arc obtained by means of l3ubnov-Galerkin 's procedure. | Vietnam Journal of Mechanics, VAST, Vol. 29, No. 3 (2007), pp. 257 - 269 Special Issue Dedicated to the l\tlemory of Prof. Nguyen Van Dao NON-LINEAR DYNAMICAL ANALYSIS OF LAMINATED REINFORCED COMPOSITE DOUBLY CURVED SHALLOW SHELLS Vu Do LONG Vietnam National University, Hanoi DAO HUY BICI-l AND Abstract. The present paper deals with a non-linear dynamical analysis of laminated reinforced composite doubly curved shallow shells. The motion equations of shell based upon the thin shell theory considering the geometrical non- linearity and the Lekhnitsky 's smeared stiffeners technique. Simultaneous ordinary differential equations arc obtained by means of l3ubnov-Galerkin 's procedure. Non-linear responses arc calculated by using an iterative procedure in conjunction with Newmark constant acceleration scheme. Obtained results allow to discover the influence of stiffeners , the shell geometry on the non-linear response of eccentrically stiffened laminated composite shells. 1. INTRODUCTION Reinforced laminated structures like plates and shallow shells are widely used in different types of structures such as aircraft and hull of ships. The stiffening member provides the benefit of added load-carrying capability with a relatively small additional weight penalty. The static and dynamic problems of laminated plates with geometrical nonlinearity were described in a book by Chia [1] extensively. Sathyamoorthy [2] reviewed a great number of papers dealing with the non-linear vibration of plates. Unreinforced composite cylindrical shells have been analysed by analytical solution procedure or finite element technique [3-9]. Static and buckling analyses of reinforced cylindrical shells have been investigated in [10-14]. However the non-linear analysis of laminated reinforced composite shells in general has received comparatively little attenion, this may be because of their inherent complexity, when the loading is large the geometric non-linearity of the shell must be .

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• Vietnam Journal of Mechanics
• Non linear dynamical analysis
• Laminated reinforced composite doubly curved shallow shells
• The geometrical non linearity
• The Lekhnitsky s smeared stiffeners technique
• Dang Dinh Ang
• Nonlinear analysis and mechanics
• Dynamic problems involving stationary cracks
• The Wiener Hopt technique
• Dual integral equations
• Dual integrals in non linear fracture mechanics
• Non linear fracture mechanics
• Energy release rate
• Discuss the obtained
• The alpha finite element method (αFEM)
• Solid mechanics using triangular and tetrahedral elements
• Suitable computational cost
• NS FEM makes
• The upper bound property
• Non linear constitutive problems in solid mechanics
• Non linear constitutive problems
• Languages Gibian and special operators
• The application FEM
• Betts miller janjic convective parameterization scheme
• H14 31 model to forecast heavy rainfall in Vietnam
• Betts Miller Janjic
• Three rain seasons
• Manufacturing dry mixed cement mortar
• High compressive strength
• High flexural strength
• Low shrinkage and high watertightness for restoration
• Damaged hydraulic structures in Vietnam
• Standard gradient models and crack simulation
• Standard gradient models
• The propagation of cracks
• Damage mechanics and crack simulation
• The interaction between two parametric excitations
• The second and third degrees
• The asymptotic method of nonlinear mechanics
• Dynamic system governed
• Comparison of two hydrological model simulations
• Nam and Xinanjiang for Nong Son catchment
• The Central Vietnam
• The runoff components
• 3 D numerical simulation
• The tidal circulation
• The gulf of Tonkin
• The kinetic energy distribution
• Duality in the analysis of responses to nonlinear systems
• The analysis of responses
• The original nonlinear systems
• The study of nonlinear mechanics
• Aerodynamics of a wing in surface effect ship
• Theory and experiment
• Wing in surface effect ship
• The aerodynamic characteristics
• The Institute of Mechanics
• The error estimate
• The convergence rate for h
• p refinement
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• Three dimensional elastostatic mechanics problems
• Some initial experimental results
• Free water layer formation in horizontal pipes
• Water layer formation
• Hanoi Institute of Mechanics
• Bending vibration of beam elements under moving loads
• Considering vehicle braking forces
• Fluctuations of structures
• Beam elements according
• Continuous element for vibration analysis
• Thick shells of revolution
• Continous Element Method
• Finite element solutions
• Natural frequencies and harmonic responses
• Cast3m implementation of the extended finite element method
• The extended finite element method for cohesive crack
• Quasi brittle materia
• The proposed implementation
• The displacement discontinuities
• Buckling analysis of simply supported composite laminates subjected
• In plane compression load
• A novel mesh ffree method
• Alternative numerical technique
• Mesh free method
• A three story building
• Hedge algebras based fuzzy controller
• The structural system
• The El Centro earthquake
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• Laminar separation phenomenon combining with numerical calculations
• The turbulent separation
• The laminar separation
• Experimental study on mechanical properties
• Three phase polymer composite reinforced
• Glass fibers and titanium oxide particles
• Polymer composite reinforced
• Three phase composite
• Dynamic characteristics of elastically supported beam subjected
• A compressive axial force and a moving load
• The implicit Newmark method
• The Galerkin finite element method
• The axial force
• Eccentrically stiffened functionally graded plates and shallow shells
• Von Karman Donnell sense
• The formulation of governing equations
• The classical shell theory
• Mathematical modelling and control of the evolution
• Dynamic systems interacting with medium
• Mathematical modeling evolutional systems interacting
• Two conjugate mechanical subsystems
• Evaluating structural safety based on fuzzy set theory
• Evaluating structural safety
• The fuzzy reliability
• Simple beam structure