Lateral Buckling Analysis of R/C Girders using Multifiber Beam Elements

2009 ◽  
Author(s):  
F.-J. Ulm ◽  
J.-L. Clément
Keyword(s):  
Buckling Analysis ◽  
Lateral Buckling ◽  
Beam Elements

Global lateral buckling analysis of idealized subsea pipelines

2014 ◽  
Vol 21 (1) ◽  
pp. 416-427 ◽  
Author(s):  
Run Liu ◽  
Wen-bin Liu ◽  
Xin-li Wu ◽  
Shu-wang Yan
Keyword(s):  
Buckling Analysis ◽  
Lateral Buckling ◽  
Subsea Pipelines

Buckling analysis of beam structure with absolute nodal coordinate formulation

2020 ◽  
pp. 095440622094711
Author(s):  
Jia Wang ◽  
Tengfei Wang
Keyword(s):  
Absolute Nodal Coordinate Formulation ◽  
Nonlinear Function ◽  
Shear Stiffness ◽  
Buckling Analysis ◽  
Absolute Nodal Coordinate ◽  
Tangent Stiffness Matrix ◽  
Beam Elements ◽  
Highly Nonlinear ◽  
Analysis Scheme ◽  
Nodal Coordinates

Absolute nodal coordinate formulation (ANCF) was applied to the buckling analysis. A delicate analysis scheme based on dichotomy method was proposed to solve the buckling problem with beam elements whose tangent stiffness matrix is a highly nonlinear function of nodal coordinates. Three existing planar beam elements are employed to show the application. The accuracy and capability of the ANCF beam for buckling analysis was validated with benchmark cases. Additionally, the influence of the shear effect on the buckling load is thoroughly investigated by comparing the solutions associated with different shear stiffness and slenderness.

scholarly journals Buckling analysis of graphene nanosheets by the finite element method

2018 ◽  
Vol 157 ◽  
pp. 06002
Author(s):  
Jozef Bocko ◽  
Pavol Lengvarský
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Graphene Nanosheets ◽  
Buckling Analysis ◽  
Single Layer Graphene ◽  
Graphene Sheets ◽  
The Finite Element Method ◽  
Structural Element ◽  
Beam Elements ◽  
Element Method

The paper is devoted to the problems related to buckling analysis of graphene sheets without and with vacancies in the structure under different boundary conditions. The analysis was performed by the classical numerical treatment – the finite element method (FEM). The graphene sheets were modelled by beam elements. Interatomic relations between carbon atoms in the structure were represented by the beams connecting individual atoms. The behaviour of the beam as structural element was based on the properties that were established from relations of molecular mechanics. The vacancies in single layer graphene sheets (SLGSs) were created by elimination of randomly chosen atoms and corresponding beam elements connected to the atoms in question. The computations were accomplished for different percentage of atom vacancies and the results represent an obvious fact that the critical buckling force decreases for increased percentage of vacancies in the structure. The numerical results are represented in form of graphs.

Lateral Buckling Analysis and ECA for Pipeline With Complex Temperature Profile

2012 ◽  
Author(s):  
Zhengmao Yang ◽  
Yadhavaraj Mageshwaran ◽  
Vijay Kittur ◽  
Gerry Lim ◽  
Hong Kiat Chia
Keyword(s):  
High Strain ◽  
Large Strain ◽  
Buckling Analysis ◽  
Large Strains ◽  
Operating Environment ◽  
Lateral Buckling ◽  
Service Environment ◽  
Buckling Behavior ◽  
Complex Temperature ◽  
Sour Service

Lateral buckling analysis of a 32 inch export pipeline operating under high temperature and high pressure in sour service environment was evaluated in this paper. In addition Engineering Critical Assessment (ECA) as per DNV-OS-F101 Appendix A was performed to derive flaw acceptance criteria for pipeline girth weld fabrication during installation. Due to the sour operating environment, low fracture toughness and increased fatigue crack growth rate during operation is expected. Consequently stringent tolerable flaw sizes are obtained for the pipeline sections subject to large strain arising from lateral buckling. In order to improve the reliability of the design and constructability of the pipeline, sleepers will be used to introduce vertical imperfections and initiate buckles at selected locations. In undertaking this it can be illustrated that all the potential lateral buckles are predetermined and pipeline sections with large strains are identified. The stringent tolerable flaw criteria from ECA are applied only on the identified high strain sections. In this paper the design of sleepers and the influence of these additional sleepers on the lateral buckling behavior are investigated.

Lateral buckling analysis of beams of arbitrary cross section by BEM

2009 ◽  
Vol 45 (1) ◽  
pp. 11-21 ◽  
Author(s):  
Evangelos John Sapountzakis ◽  
John Andrew Dourakopoulos
Keyword(s):  
Cross Section ◽  
Arbitrary Cross Section ◽  
Buckling Analysis ◽  
Lateral Buckling
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