Global static and stability analysis of thin-walled structures with open cross-section using FE shell-beam models

Koczubiej, S.; Cichoń, Czesław

doi:10.1016/j.tws.2014.04.014

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…One-dimension-to-continuum transition elements have been developed by Wagner and Gruttmann (2002), and were later extended by Chavan and Wriggers (2004) to include warping, and Koczubiej and Cichoń (2014) further extended these elements to the total Lagrangian formulation. More recently, Sadeghian et al (2018) developed transition elements between 1D beam-column elements and 2D membrane elements for the analysis of reinforced concrete members.…”

Section: Review Of Coupling Methodsmentioning

confidence: 99%

Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns

Hartloper¹,

Sousa²,

Lignos³

2022

J. Struct. Eng.

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A warping-inclusive kinematic coupling method to be used in finite element analysis of members featuring wide-flange cross-sections is proposed in this paper. This coupling method is used in mixed-dimension macro models that combine continuum and beam-column elements to reduce the computational cost of purely continuum finite element models. The proposed coupling method, utilizing either linear or nonlinear constraint equations, is implemented and validated in a commercial finite element software; the source code is made publicly available. Case studies indicate that including warping in the coupling formulation is critical for components that may experience coupled local and lateral-torsional buckling. Also highlighted is the potential of macro models to reduce the total degrees-of-freedom by up-to about 60 %, and computational memory use by up-to around 80 %, while retaining solution fidelity for beam, column, and panel zone components in 1Hartloper, November 13, 2020 steel moment-resting frames. The case studies show that the linear constraint equation formulation may not be suitable for all problems, however, it may still yield acceptable results as long as the level of twisting is insignificant and lateral-torsional buckling is not critical.

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Section: Review Of Coupling Methodsmentioning

confidence: 99%

Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns

Hartloper¹,

Sousa²,

Lignos³

2022

J. Struct. Eng.

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“…In the models, 1D bar elements of the beams are complemented by 3D joint models. In this respect, static and stability analysis methods reported in studies [ 3 , 4 , 5 , 6 ] among others, provide an interesting option. Such solutions allow for the local, spatial modelling of the geometry of joint details, while using a bar model for other structural members.…”

Section: Introductionmentioning

confidence: 99%

Elastic Critical Resistance of the Simple Beam Grillage Resulting from the Lateral Torsional Buckling Condition: FEM Modelling and Analytical Considerations

2023

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Transversely loaded beam grillages are quite often used in industrial construction. In order to produce a safe design of such structures, it is necessary to account for the lateral torsional buckling phenomenon, which reduces load-bearing capacity. To be able to calculate the relevant reduction factor, the elastic critical load must be determined. As regards the existing design practice for such structures, simplified conditions are assumed for the mutual restraint of the component beams. However, this approach does not correspond to reality. This study discusses the results of numerical investigations and analytical calculations concerning the effect of the elastic action of simple beam grillage (SBG) joints on the critical load, which results from the lateral torsional buckling (LTB) condition. The SBG was defined as a flat system of interconnected beams, unstiffened laterally and loaded perpendicularly to the grillage plane. The analysis covered H-shaped grillages with different span ratios of component beams, in which the main (coupling) beam was decisive for instability. The effectiveness of the use of closed-section stiffeners at the grillage joints was also investigated. The grillage elastic critical resistances (ECR) were determined for two variants of joint stiffening. The computations were performed by means of FEM numerical simulations. The spatial models were discretised with the following elements: (1) solid ones in Abaqus, (2) shell ones in ConSteel, and (3) thin-walled bars in ConSteel. The LTB critical moments of the weakest beam (critical beam), elastically restrained against warping and against lateral rotation (in the LTB plane), were computed using the analytical methods developed by the authors. To this end, the methods were proposed to determine the indexes of the critical beam elastic restraint in the adjacent stiffening beams. In the study, it was demonstrated that (1) taking into account the conditions of mutual elastic restraint and interaction of the component beams provides a more accurate assessment of the grillage ECR, (2) the use of closed-section stiffeners in the grillage joints increase the ECR compared with classic flat stiffeners, (3) the grillage ECR can be estimated based on the critical moment Mcr of the weakest beam (critical beam) when the conditions of its elastic restraint in joints are accounted for.

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Section: Introductionmentioning

confidence: 99%

“…The static and dynamic behaviors of the system can be characterized in the most comprehensive way using strain data measured by strain gauge technology and finite element solution (FEA). 11 Thin-walled structures are subject to a large bending moment and fatigue when used in industry. It is very difficult to examine this bending mechanism and define this collapse for special sections other than standard sections.…”

Section: Introductionmentioning

confidence: 99%

Design of a precision planter chassis using computer-aided engineering and experimental validation

İrsel

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The application of X-section beams in the modular and strength-based design of a precision planter chassis was investigated numerically and experimentally in a case study. This study deals with the feasibility of a special section design with a systematic engineering approach. Mechanical tests were performed for the beam evaluated in a mounting system. The X-section beam model and the mounting elements on this beam were created using computer-aided engineering software, and the compatibility of the design with the mass criterion was investigated. This model was edited as a 2D and 3D mixed model and analyzed with the finite element method to analyzing studies of the system. Stress measurement was conducted using strain gauges at specified points in the system whose prototype was produced. These strain data were processed with nCode DesignLife software, and nonlinear FEA analyses were validated using these stress measurements. The fatigue damage of the X-section beam under dynamic loading conditions was investigated using the FE model solution and experimental measurement data (CAE-based fatigue analysis) with nCode software. The X-section beam design adopted a multiple-objective genetic algorithm technique for optimization by means of ANSYS. The maximum stress value was 121.83 MPa, and a 7.77 kg material was saved correlated to the prototype with the help of optimization solved 400 iterations. It has been determined that the X-section beam is safe by 1.06 × 106 cycles under these loading conditions and can carry a load of 1600 kg. The X-section beam can be successfully applied in similar systems owing to its assemblability and functionality.

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Global static and stability analysis of thin-walled structures with open cross-section using FE shell-beam models

Cited by 5 publications

References 22 publications

Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns

Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns

Elastic Critical Resistance of the Simple Beam Grillage Resulting from the Lateral Torsional Buckling Condition: FEM Modelling and Analytical Considerations

Design of a precision planter chassis using computer-aided engineering and experimental validation

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