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Dynamic instability characteristics of advanced grid stiffened conical shell with laminated composite skins

Bohlooly, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jsv.2020.115572
  3. Publisher: Academic Press , 2020
  4. Abstract:
  5. Dynamical instability characteristics of sandwich truncated conical shell are investigated. The three-layered shell is composed of advanced grid stiffened core and laminated composite skins. The core maybe made of three different fiber paths. The conical shell with simply-supported ends is subjected to two different types of time-dependent axial compressions. The equations of motion and compatibility are derived by considering Kirchhoff-Love assumptions and von Karman relations. The solution procedure is divided to two steps. First, the terms consisting of spatial derivatives are eliminated by applying a stress function and following the Galerkin method. Second, the terms with temporal derivatives are solved with Runge-Kutta method. A new condition of Budiansky-Roth criterion is offered for detection of dynamic buckling load. The effects of different fiber paths and lay-up configurations are investigated. © 2020 Elsevier Ltd
  6. Keywords:
  7. Advanced grid stiffened ; Conical ; Dynamic buckling ; Laminated composite ; Time response ; Equations of motion ; Galerkin methods ; Laminating ; Runge Kutta methods ; Shells (structures) ; Dynamic buckling load ; Dynamic instability ; Dynamical instabilities ; Solution procedure ; Spatial derivatives ; Stiffened conical shells ; Temporal derivatives ; Truncated conical shell ; Laminated composites
  8. Source: Journal of Sound and Vibration ; Volume 488 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0022460X20304041