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Transient dynamic response of doubly curved laminated composite shells under pulse loading
Abstract Transient response behavior of laminated doubly curved shells with varying geometry and boundary conditions subjected to various time-dependent pulse loads is investigated using Higher order Shear Deformation Theory (HSDT) in the present study. The ratio of thickness co-ordinate to radius of shell (z/R) is incorporated in the mathematical formulation based on HSDT. The condition of zero transverse shear stresses at free surfaces of laminated shell is also included in the displacement function. A C0 finite element formulation using eight noded isoparametric shell element with seven degrees of freedom per node is applied to evaluate the dynamic response of shells. Three types of pulse loading such as sine, triangular and rectangular pulses are considered for the present investigation. Newmark's β method is applied to solve the dynamic equilibrium equation of the shells. The accuracy of the present analysis is examined by comparing the results obtained with those available in the published literature. Several numerical examples are illustrated to show the effects of pulse loading and boundary condition on the central displacement and stresses of laminated composite shells.
Highlights Laminated shells subjected to different time dependent pulse loadings were investigated. The laminated shell model was analyzed using HSDT with actual strain-displacement relations. The influences of different boundary conditions on transient responses were reported.
Transient dynamic response of doubly curved laminated composite shells under pulse loading
Abstract Transient response behavior of laminated doubly curved shells with varying geometry and boundary conditions subjected to various time-dependent pulse loads is investigated using Higher order Shear Deformation Theory (HSDT) in the present study. The ratio of thickness co-ordinate to radius of shell (z/R) is incorporated in the mathematical formulation based on HSDT. The condition of zero transverse shear stresses at free surfaces of laminated shell is also included in the displacement function. A C0 finite element formulation using eight noded isoparametric shell element with seven degrees of freedom per node is applied to evaluate the dynamic response of shells. Three types of pulse loading such as sine, triangular and rectangular pulses are considered for the present investigation. Newmark's β method is applied to solve the dynamic equilibrium equation of the shells. The accuracy of the present analysis is examined by comparing the results obtained with those available in the published literature. Several numerical examples are illustrated to show the effects of pulse loading and boundary condition on the central displacement and stresses of laminated composite shells.
Highlights Laminated shells subjected to different time dependent pulse loadings were investigated. The laminated shell model was analyzed using HSDT with actual strain-displacement relations. The influences of different boundary conditions on transient responses were reported.
Transient dynamic response of doubly curved laminated composite shells under pulse loading
Thakur, Sandipan Nath (author) / Ray, Chaitali (author)
Thin-Walled Structures ; 160
2020-11-28
Article (Journal)
Electronic Resource
English
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