Safety Factor of Welded-Plate Beams based on Finite Element Linear Buckling Analysis

2014 ◽  
Author(s):  
Van Ngan Lê ◽  
Henri Champliaud
Keyword(s):  
Finite Element ◽  
Safety Factor ◽  
Buckling Analysis ◽  
Linear Buckling ◽  
Linear Buckling Analysis

Tripping Analysis and Design Consideration of Permanent Means of Access Structure

2011 ◽  
Author(s):  
Ming Ma ◽  
Beom-Seon Jang ◽  
Owen F. Hughes
Keyword(s):  
Finite Element ◽  
Design Space Exploration ◽  
Solution Process ◽  
Local Buckling ◽  
Extensive Study ◽  
Buckling Analysis ◽  
Element Analysis ◽  
Analysis And Design ◽  
Linear Buckling ◽  
Linear Buckling Analysis

An efficient Rayleigh-Ritz approach is presented for analyzing the lateral-torsional buckling (“tripping”) behavior of permanent means of access (PMA) structures. Tripping failure is dangerous and often occurs when a stiffener has a tall web plate. For ordinary stiffeners of short web plates, tripping usually occurs after plate local buckling and often happens in plastic range. Since PMA structures have a wide platform for a regular walk-through inspection, they are vulnerable to elastic tripping failure and may take place prior to plate local buckling. Based on an extensive study of finite element linear buckling analysis, a strain distribution is assumed for PMA platforms. The total potential energy functional, with a parametric expression of different supporting members (flat bar, T-stiffener and angle stiffener), is formulated, and the critical tripping stress is obtained using eigenvalue approach. The method offers advantages over commonly used finite element analysis because it is mesh-free and requires only five degrees of freedom; therefore the solution process is rapid and suitable for design space exploration. The numerical results are in agreement with NX NASTRAN [1] linear buckling analysis. Design recommendations are proposed based on extensive parametric studies.

scholarly journals Prediction of Nominal Compressive Strength in Steel Piles Subject to Corrosion Losses: A Finite Element Approach

2020 ◽  
Vol 9 (1) ◽  
pp. 24-30
Author(s):  
Breanna Bailey ◽  
Sidiq A. Osomo
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Buckling Analysis ◽  
Cross Sectional ◽  
Steel Construction ◽  
Linear Buckling ◽  
Non Linear ◽  
Post Buckling ◽  
Element Approach ◽  
Linear Buckling Analysis

 This paper presents a method for predicting the nominal compressive strength of steel I-shaped piles subject to cross-sectional losses caused by corrosion.  The method requires a finite element linear buckling analysis of the corroded cross-section.  Results from the finite element buckling analysis may be integrated into design capacity equations contained in the 15th edition of the American Institute of Steel Construction Steel Construction Manual.  Non-linear post-buckling analyses were used to verify the accuracy of the proposed method.  Three cross-sectional geometries (W14x82, W14x90, and W14x120) were analyzed at varying degrees of cross-sectional loss.  Results show close agreement between the non-linear finite element analyses and the proposed method of calculating nominal compressive strength.

scholarly journals Non-linear buckling analysis of functionally graded shallow spherical shells

2009 ◽  
Vol 31 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Dao Huy Bich
Keyword(s):  
External Pressure ◽  
Buckling Analysis ◽  
Functionally Graded ◽  
Power Law Distribution ◽  
Governing Equations ◽  
Spherical Shells ◽  
Buckling Loads ◽  
Linear Buckling ◽  
Non Linear ◽  
Linear Buckling Analysis

In the present paper the non-linear buckling analysis of functionally graded spherical shells subjected to external pressure is investigated. The material properties are graded in the thickness direction according to the power-law distribution in terms of volume fractions of the constituents of the material. In the formulation of governing equations geometric non-linearity in all strain-displacement relations of the shell is considered. Using Bubnov-Galerkin's method to solve the problem an approximated analytical expression of non-linear buckling loads of functionally graded spherical shells is obtained, that allows easily to investigate stability behaviors of the shell.

Linear Buckling Analysis Considering No-compression Property of Metal Grid Shells Stiffened by Tension Braces

2021 ◽  
Vol 62 (3) ◽  
pp. 195-205
Author(s):  
Kenji Yamamoto ◽  
Hayato Utebi
Keyword(s):  
Geometrical Nonlinearity ◽  
Buckling Analysis ◽  
Nonlinear Buckling ◽  
Compression Property ◽  
Buckling Behavior ◽  
Metal Grid ◽  
Linear Buckling ◽  
Nonlinear Buckling Analysis ◽  
Linear Buckling Analysis ◽  
Lattice Shells

In order to analyze the buckling behavior of lattice shells stiffened by cables or slender braces without pre-tension, it is necessary to consider the no-compression property of braces. This paper proposes an innovative method of linear buckling analysis that considers the no-compression property of braces. Moreover, in order to examine the proposed method's validity, its results are compared with the results from a nonlinear buckling analysis with geometrical nonlinearity and material nonlinearity to express the no-compression property of braces. The results show that the proposed method can well-predict the buckling behaviors of lattice shells stiffened by tension braces.

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