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

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...

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Bibliographic Details
Published in:Journal of sound and vibration 2020-12, Vol.488, p.115572, Article 115572
Main Authors: Bohlooly, Mehdi, Kouchakzadeh, Mohammad Ali, Mirzavand, Babak, Noghabi, Mohammad
Format: Article
Language:English
Subjects:
Advanced grid stiffened
Composite materials
Conical
Conical shells
Derivatives
Dynamic buckling
Dynamic stability
Dynamical systems
Equations of motion
Fiber reinforced composites
Galerkin method
Laminar composites
Laminated composite
Runge-Kutta method
Stress functions
Time response
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Summary: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.
ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2020.115572