scholarly journals Benchmark solutions and assessment of variable kinematics models for global and local buckling of sandwich struts

2016 ◽  
Vol 156 ◽  
pp. 125-134 ◽  
Author(s):  
Michele D’Ottavio ◽  
Olivier Polit ◽  
Wooseok Ji ◽  
Anthony M. Waas
Keyword(s):  
Local Buckling ◽  
Global And Local ◽  
Benchmark Solutions

A novel finite element for global and local buckling analysis of sandwich beams

2009 ◽  
Vol 90 (3) ◽  
pp. 270-278 ◽  
Author(s):  
Heng Hu ◽  
Salim Belouettar ◽  
Michel Potier-Ferry ◽  
Ahmed Makradi
Keyword(s):  
Finite Element ◽  
Local Buckling ◽  
Buckling Analysis ◽  
Sandwich Beams ◽  
Global And Local

Global and local buckling of sandwich circular and beam-rectangular plates with metal foam core

2012 ◽  
Vol 61 ◽  
pp. 154-161 ◽  
Author(s):  
P. Jasion ◽  
E. Magnucka-Blandzi ◽  
W. Szyc ◽  
K. Magnucki
Keyword(s):  
Metal Foam ◽  
Local Buckling ◽  
Foam Core ◽  
Rectangular Plates ◽  
Global And Local

Numerical Investigation of Tearing Fracture of Wrinkled Pipe

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
Arman U. Ahmed ◽  
Sreekanta Das ◽  
J. J. Roger Cheng
Keyword(s):  
Local Buckling ◽  
Element Model ◽  
Local Deformation ◽  
Slope Instability ◽  
Pipe Material ◽  
Large Displacements ◽  
Key Factor ◽  
Detailed Assessment ◽  
Deformation Patterns ◽  
Global And Local

Steel pipelines, buried in cold regions, often respond to thermal strains and/or geotechnical movement caused by factors such as thaw settlement, frost heave, and slope instability. These complex field conditions can impose large displacements on these pipelines, resulting in localized wrinkles well into the plastic range of the pipe material. Eventually, there is a possibility of a fracture occurring at a wrinkled location under continuous deformation. A recent field fracture and a failed laboratory specimen have been observed within a telescopic wrinkle under tearing action and the loading histories have been found to be monotonic, without significant strain reversals. These incidents underscore the need for a detailed investigation, which seeks to answer fundamental questions regarding this unique mode of failure. In this study, a finite element model has been developed, which is capable of accounting for material nonlinearity effects, large displacements, large rotations, initial imperfections, and possible complex contact surfaces. Based on limited test data, the comparison of the numerical and the experimental results demonstrates the ability of the present model to predict the local buckling behavior of pipes when deformed well into the postwrinkling range. The results of this analytical work include the global and local deformation patterns and a detailed assessment of the stress-strain relations at the region of the telescopic wrinkle. The results obtained from this study have recognized the occurrence of strain reversal at the sharp fold of the wrinkle on the compression side of the pipe, a phenomenon that could be considered to be the key factor for triggering this unique failure mechanism.

LOCAL AND INTERACTIVE POST-BUCKLING OF RHS THIN-WALLED MEMBERS — COMPARING A NEW SPECIAL BEAM FINITE ELEMENT WITH SHELL FE MODELS

2007 ◽  
Vol 07 (02) ◽  
pp. 213-241 ◽  
Author(s):  
HERVE DEGEE ◽  
NICOLAS BOISSONNADE ◽  
BARBARA ROSSI
Keyword(s):  
Finite Element ◽  
Local Buckling ◽  
Linear Analysis ◽  
Local Deformation ◽  
Theoretical Formulation ◽  
Non Linear ◽  
Beam Displacement ◽  
Post Buckling ◽  
Thin Walled ◽  
Global And Local

This paper presents a special thin-walled plane beam finite element that accounts for the in-plane cross-section local deformation. The element is based on the superposition of a classical beam displacement field and of an additional field describing local effects, with an approximation on the local second-order membrane stress field. The theoretical formulation is summarized and an application of the resulting numerical tool to the post-buckling analysis of RHS thin-walled members with moderate local and global slenderness susceptible to both global and local buckling is then performed. Different types of analyses are presented (computation of critical bifurcation loads, geometrically non-linear analysis, geometrically and materially non-linear analysis). The results obtained with the proposed beam finite element are compared to values provided by shell FE models.

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