Nonlinear dynamic response of steel materials and plain plate systems to impact loads: Review and validation

2018 ◽  
Vol 173 ◽  
pp. 758-767 ◽  
Author(s):  
Maryam Mortazavi ◽  
YeongAe Heo
Keyword(s):  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
Impact Loads ◽  
Nonlinear Dynamic Response

Nonlinear Dynamic Response of Elastically Supported Stiffened Plates with Initial Stresses and Geometric Imperfections Under Impact Loads

2020 ◽  
Vol 20 (04) ◽  
pp. 2050053
Author(s):  
Niu-Jing Ma ◽  
Li-Xiong Gu ◽  
Long Piao
Keyword(s):  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Initial Stresses ◽  
Stiffened Plates ◽  
Impact Loads ◽  
Stiffened Plate ◽  
Geometric Imperfections ◽  
Nonlinear Dynamic Response ◽  
Elastically Supported

This paper deals with the nonlinear dynamic response of elastically supported stiffened plates with initial stresses under impact loads. A stiffened plate is assumed to be composed of a plate with some stiffeners, which are treated separately. The plate is modeled by the thin plate theory, whereas the stiffeners are considered as geometrically nonlinear Euler–Bernoulli beams. First, the equations of both the kinetic energies and strain energies of the plate and stiffeners are established. Then, the dynamic equilibrium equations for the stiffened plate are derived as the Lagrange’s equation of the functional. A parametric analysis is performed to evaluate how initial stresses, initial geometric imperfections, elastic supports, impact loads and configuration of stiffeners affect the time-history responses of the stiffened plates. Some useful nonlinear dynamic properties are obtained, which serve as references for engineering design and application.

Nonlinear Dynamic Buckling of FGM Shallow Conical Shells under Triangular Pulse Impact Loads

2012 ◽  
Vol 460 ◽  
pp. 119-126
Author(s):  
Jie Lin ◽  
Chao Deng ◽  
Jia Chu Xu
Keyword(s):  
Dynamic Response ◽  
Governing Equation ◽  
Nonlinear Dynamic ◽  
Dynamic Buckling ◽  
Impact Loads ◽  
Nonlinear Dynamic Response ◽  
Conical Shells ◽  
Triangular Pulse ◽  
Response Equation ◽  
The Impact

In this paper, nonlinear dynamic buckling of FGM shallow conical shells under the action of triangular pulse impact loads are investigated. The nonlinear dynamic governing equation of symmetrically FGM shallow conical shells is built. Using Galerkin method, the nonlinear dynamic governing equation is solved, and the nonlinear dynamic response equation of symmetrically FGM shallow conical shells is obtained. The Runge-Kutta method is introduced to numerically solve the nonlinear dynamic response equation and the impact response curve is achieved. Budiansky-Roth motion criterion expressed by the displacement of the peak of the shell is employed to determine the critical impact buckling load. The influences of geometric parameters and gradient constants on impact buckling are discussed as well.

Nonlinear Dynamic Response and Buckling of Damaged Composite Pipes Under Radial Impact

2006 ◽  
Author(s):  
Wenyong Tang ◽  
Tianlin Wang ◽  
Shengkun Zhang
Keyword(s):  
Dynamic Response ◽  
Shear Deformation ◽  
Nonlinear Dynamic ◽  
Shear Deformation Theory ◽  
Nonlinear Dynamic Response ◽  
Nonlinear Dynamic Equations ◽  
Geometric Deformation ◽  
Initial Geometric Imperfections ◽  
Set Up ◽  
Composite Pipes

In this paper, the nonlinear dynamic response and buckling of damaged composite pipes under radial impact is investigated. A model involving initial geometric deformation, delamination and sub-layer matrix damage is set up for theoretical analysis. Based on the first order shear deformation theory, the nonlinear dynamic equations of the composite pipe considering transverse shear deformation and initial geometric imperfections are obtained by Hamilton’s theory and solved by a semi-analytical finite difference method. The effects of damage on the dynamic response and buckling of composite pipes are discussed.

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