Journal ArticleDOI
Numerical and experimental study of buckling of advanced fiber composite cylinders under axial compression
TLDR
In this paper, the effects of different types of loadings, geometric properties, lamina lay-up and amplitudes of imperfection on the strength of the cylinders under compression are studied.Abstract:
Advanced lightweight laminated composite shells are increasingly being used in modern aerospace structures, for enhancing their structural efficiency and performance. Such thin-walled structures are susceptible to buckling when subjected to static and dynamic compressive stresses. In this paper, details of a numerical (FEM) and an experimental study on buckling of carbon fiber reinforced plastics (CFRP) layered composite cylinders under displacement and load controlled static and dynamic axial compression are reported. The effects of different types of loadings, geometric properties, lamina lay-up and amplitudes of imperfection on the strength of the cylinders under compression are studied. Accurate measurement of imperfections in the cylindrical surface is carried out in the specimens tested. It is shown that the buckling behavior of thin composite cylindrical shells can be evaluated accurately by modeling measured imperfections and material properties in FEM.read more
Citations
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Journal ArticleDOI
Robust design criterion for axially loaded cylindrical shells - Simulation and Validation
TL;DR: In this paper, a comprehensive numerical analysis is performed in order to study the influence of length effect on the lower bound of the buckling load, which is based on the single boundary perturbation approach (SBPA) for cylindrical shells.
Journal ArticleDOI
Robust knockdown factors for the design of axially loaded cylindrical and conical composite shells – Development and Validation
TL;DR: In this paper, perturbation approaches for the design of axially loaded cylindrical and conical shells are presented for a physical based estimation of the lower bound buckling load and are suitable for research and industrial applications.
Journal ArticleDOI
Experimental validation of cylindrical shells under axial compression for improved knockdown factors
TL;DR: In this article, the authors compared measured imperfections and superimposed radial point load imperfections for cylindrical shells under axial compression and found that the WMPLA approach is able to envelop the small and large-amplitude measured imperfection, which has the potential to predict a rational lower bound on the buckling loads of unstiffened cylinear shells.
Journal ArticleDOI
Robust design of imperfection sensitive thin-walled shells under axial compression, bending or external pressure
TL;DR: In this paper, a numerical design approach for buckling of critical shell structures is presented, which is based on the reduced stiffness method and leads to significantly improved critical load estimations in comparison to lower-bounds obtained empirically.
Journal ArticleDOI
Tailoring the elastic postbuckling response of thin-walled cylindrical composite shells under axial compression
TL;DR: In this paper, the elastic response of axially compressed laminated composite cylindrical shells in the far postbuckling regime is evaluated and three methods are explored: varying ply orientation and laminate stacking sequence, introducing patterned material stiffness distributions, and providing internal lateral constraints.
References
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Journal ArticleDOI
An incremental approach to the solution of snapping and buckling problems
TL;DR: In this paper, an incremental approach to the solution of buckling and snapping problems is explored, where the authors use the length of the equilibrium path as a control parameter, together with the second order iteration method of Newton.
Journal ArticleDOI
Review of studies on geometrically nonlinear vibrations and dynamics of circular cylindrical shells and panels, with and without fluid-structure interaction
MonographDOI
Buckling experiments : experimental methods in buckling of thin-walled structures
TL;DR: A Simple Buckling Test for Column Under Axial Compression as discussed by the authors is a simple test for postbuckling behavior of structural components, such as columns, beams, and columns.
Journal ArticleDOI
Robust design of composite cylindrical shells under axial compression — Simulation and validation
TL;DR: In this article, a new deterministic approach is presented for determining the lower bound of the buckling load of thin-walled cylindrical composite shells, which is derived from phenomenological test data.