scholarly journals Post-buckling behaviour and strength of multi-stiffened aluminium panels under combined axial compression and lateral pressure

2010 ◽  
Vol 23 (1) ◽  
pp. 39-66 ◽  
Author(s):  
Mohammad Reza Khedmati ◽  
Abbas Bayatfar ◽  
Philippe Rigo
Keyword(s):  
Axial Compression ◽  
Lateral Pressure ◽  
Post Buckling

A characteristic type of instability in the large deflexions of elastic plates III. Curved rectangular plates in axial compression

1954 ◽  
Vol 222 (1148) ◽  
pp. 44-59 ◽  
Keyword(s):  
Axial Compression ◽  
Rectangular Plates ◽  
Bending Moments ◽  
Elastic Plates ◽  
Characteristic Type ◽  
Circular Tubes ◽  
Axis Parallel ◽  
Post Buckling ◽  
Thin Walled ◽  
The Stability

The analysis of part I is extended to deal with the case of free-edged rectangular plates having an initial curvature about an axis parallel to one pair of opposite edges and loaded by distributed bending moments applied to the straight edges and compressive forces applied to the curved edges. In particular, the stability and post-buckling behaviour of such plates subjected to the compressive forces alone is studied. The axially symmetrical buckling of thin-walled circular tubes in axial compression is also considered. Experimental plates are found to buckle at loads rather lower than those predicted.

scholarly journals Fully localized post-buckling states of cylindrical shells under axial compression

2017 ◽  
Vol 473 (2205) ◽  
pp. 20170177 ◽  
Author(s):  
Tobias Kreilos ◽  
Tobias M. Schneider
Keyword(s):  
Axial Compression ◽  
Stability Boundary ◽  
Axial Direction ◽  
Edge State ◽  
Equilibrium Solutions ◽  
Thin Cylindrical Shell ◽  
Nonlinear Force ◽  
Post Buckling ◽  
The Stability ◽  
Nonlinear Solutions

We compute nonlinear force equilibrium solutions for a clamped thin cylindrical shell under axial compression. The equilibrium solutions are dynamically unstable and located on the stability boundary of the unbuckled state. A fully localized single dimple deformation is identified as the edge state —the attractor for the dynamics restricted to the stability boundary. Under variation of the axial load, the single dimple undergoes homoclinic snaking in the azimuthal direction, creating states with multiple dimples arranged around the central circumference. Once the circumference is completely filled with a ring of dimples, snaking in the axial direction leads to further growth of the dimple pattern. These fully nonlinear solutions embedded in the stability boundary of the unbuckled state constitute critical shape deformations. The solutions may thus be a step towards explaining when the buckling and subsequent collapse of an axially loaded cylinder shell is triggered.

Delamination Suppression in Sandwich Beams Using Translaminar Reinforcements

1999 ◽  
Author(s):  
Brian T. Wallace ◽  
Bhavani V. Sankar ◽  
Peter G. Ifju
Keyword(s):  
Axial Compression ◽  
Sandwich Beam ◽  
Sandwich Beams ◽  
Thickness Direction ◽  
Compression Tests ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Buckling Loads ◽  
Buckling Behavior ◽  
Post Buckling

Abstract The present study is concerned with translaminar reinforcement in a sandwich beam for preventing buckling of a delaminated face-sheet under axial compression. Graphite/epoxy pins are used as reinforcement in the thickness direction of sandwich beams consisting of graphite/epoxy face-sheets and a Aramid honeycomb core. Compression tests are performed to understand the effects of the diameter of the reinforcing pins and reinforcement spacing on the ultimate compressive strength of the delaminated beams. A finite element analysis is performed to understand the effects of translaminar reinforcement on the critical buckling loads and post-buckling behavior of the sandwich beam under axial compression.

Post-buckling Behavior of Stiffened Cross-Ply Cylindrical Shells

1994 ◽  
Vol 61 (4) ◽  
pp. 998-1000 ◽  
Author(s):  
M. Savoia ◽  
J. N. Reddy
Keyword(s):  
Axial Compression ◽  
Carrying Capacity ◽  
Shell Theory ◽  
Load Carrying Capacity ◽  
Imperfection Sensitivity ◽  
Buckling Modes ◽  
Geometric Imperfection ◽  
Buckling Behavior ◽  
Load Carrying ◽  
Post Buckling

The post-buckling of stiffened, cross-ply laminated, circular determine the effects of shell lamination scheme and stiffeners on the reduced load-carrying capacity. The effect of geometric imperfection is also included. The analysis is based on the layerwise shell theory of Reddy, and the “smeared stiffener” technique is used to account for the stiffener stiffness. Nu cylinders under uniform axial compression is investigated to merical results for stiffened and unstiffened cylinders are presented, showing that imperfection-sensitivity is strictly related to the number of nearly simultaneous buckling modes.

A Simple Model of a Stiffened Shell-Type Structure for an Investigation Into the Vibration-Buckling Correlation

1996 ◽  
Vol 63 (2) ◽  
pp. 517-522 ◽  
Author(s):  
V. M. Ryaboy ◽  
T. Weller
Keyword(s):  
Simple Model ◽  
Critical Load ◽  
Axial Compression ◽  
Type Structure ◽  
Characteristic Curves ◽  
Stiffened Shell ◽  
Post Buckling ◽  
Stiffened Cylindrical Shells ◽  
Two Degree Of Freedom ◽  
Peculiar Behavior

A nonlinear two-degree-of-freedom system is considered to simulate the peculiar behavior of stringer-stiffened cylindrical shells under nonuniform axial compression, which was observed in recent tests where the characteristic curves (eigenfrequency squared versus load) were nonmonotonic and decreasing steeply when approaching the critical load. Correlation is traced between the characteristic curves and equilibrium paths. It is shown that for particular nonzero values of load eccentricity, bifurcations are observed instead of the usual limit points. Nonunique stable post-buckling equilibrium paths are pointed out. The general properties of characteristic curves are discussed.

scholarly journals Buckling and post-buckling behaviour of shallow – nearly flat cylindrical panels under axial compression

2016 ◽  
Vol 64 (3) ◽  
pp. 655-658 ◽  
Author(s):  
E. Magnucka-Blandzi ◽  
K. Magnucki
Keyword(s):  
Differential Equations ◽  
Axial Compression ◽  
Nonlinear Theory ◽  
Cylindrical Shells ◽  
Critical Stresses ◽  
Cylindrical Panels ◽  
Post Buckling ◽  
Range Of Values

Abstract The paper is devoted to buckling problem of axially compressed shallow cylindrical panels. Governing differential equations of the nonlinear theory of shallow cylindrical shells are analytically solved. Critical stresses and equilibrium paths of the panels with small curvatures are analytically studied. The formula of the critical stresses for almost flat, cylindrical panels is derived. The “shallowness” of the panel is given by the parameter α and formulae are derived for a range of this parameter. The range of values of sectorial angle for these panels is also defined.

Sign in / Sign up

Export Citation Format

Share Document