Numerical buckling analysis of thin steel plates with centered hexagonal perforation through constructal design method

2019 ◽  
Vol 41 (8) ◽  
Author(s):  
Caio César Cardoso da Silva ◽  
Daniel Helbig ◽  
Marcelo Langhinrichs Cunha ◽  
Elizaldo Domingues dos Santos ◽  
Luiz Alberto Oliveira Rocha ◽  
...  
Keyword(s):  
Design Method ◽  
Buckling Analysis ◽  
Steel Plates ◽  
Constructal Design ◽  
Thin Steel

Numerical study of the elasto-plastic buckling in perforated thin steel plates using the constructal design method

2018 ◽  
Author(s):  
Daniel Helbig ◽  
◽  
Marcelo Langhinrichs Cunha ◽  
Caio Cesar Cardoso da Silva ◽  
Elizaldo Domingues dos Santos ◽  
...  
Keyword(s):  
Numerical Study ◽  
Design Method ◽  
Steel Plates ◽  
Plastic Buckling ◽  
Constructal Design ◽  
Thin Steel

scholarly journals NUMERICAL SIMULATION ANDCONSTRUCTAL DESIGN APPLIED TO THE STUDY OF ELASTIC BUCKLING IN THIN STEEL PLATES WITH OBLONG PERFORATIONS

2018 ◽  
Vol 8 (20) ◽  
Author(s):  
Emilio Gabriel Gonçalves Folzke ◽  
Thiago Da Silveira ◽  
João Paulo Silva Lima ◽  
Luiz Alberto Oliveira Rocha ◽  
Elizaldo Domingues Dos Santos ◽  
...  
Keyword(s):  
Critical Load ◽  
Volume Fraction ◽  
Design Method ◽  
Steel Plates ◽  
Constructal Theory ◽  
Elastic Buckling ◽  
The Finite Element Method ◽  
Perforated Plates ◽  
Constructal Design ◽  
Thin Steel

ABSTRACTBuckling is an instability phenomenon that can happen when a slender plate is subjected to axial compression loads. In addition, perforated plates are often necessary in the engineering field. Throughout this article, the Constructal Design Method, which is based on the Constructal Theory, has been used to evaluate the influence of the hole on thin steel plates under elastic buckling. For that, the different types of holes analyzed were both transversal and longitudinal oblong. They were all placed in the center of the plate. The geometry of the hole varied according to the degree of freedom H0/L0, which relates the dimensions of each type of different hole. The size of the perforation are varied by means the hole volume fraction (f) parameter, that represents the relation between the volume of the hole and the total volume of the plate (without hole). The main goal is to achieve the greatest critical load for the perforated plates. To do so, the ANSYS software, based on the Finite Element Method (FEM), has been used to numerically analyze the elastic buckling in each case. It has been observed the importance of the geometry when seeking superior performances: through a simple fluctuation of the geometry of the hole, once the volume fraction was kept constant, it was possible to achieve a significant increase on the critical loads. Key words: Buckling; Computational Modeling; Critical Load; Constructal Design.

scholarly journals Numerical evaluation of the effect of type and shape of perforations on the buckling of thin steel plates by means of the constructal design method

2016 ◽  
Vol 34 (Special Issue 1) ◽  
pp. S9-S20 ◽  
Author(s):  
Giulio Lorenzini ◽  
Daniel Helbig ◽  
Caio Silva ◽  
Mauro Real ◽  
Elizaldo Santos ◽  
...  
Keyword(s):  
Numerical Evaluation ◽  
Design Method ◽  
Steel Plates ◽  
Constructal Design ◽  
Thin Steel

scholarly journals Study About Buckling Phenomenon in Perforated Thin Steel Plates Employing Computational Modeling and Constructal Design Method

2016 ◽  
Vol 13 (10) ◽  
pp. 1912-1936 ◽  
Author(s):  
Daniel Helbig ◽  
Caio Cesar Cardoso da Silva ◽  
Mauro de Vasconcellos Real ◽  
Elizaldo Domingues dos Santos ◽  
Liércio André Isoldi ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Design Method ◽  
Steel Plates ◽  
Constructal Design ◽  
Thin Steel

scholarly journals Numerical evaluation of the effect of type and shape of perforations on the buckling of thin steel plates by means of the constructal design method

2016 ◽  
Vol 34 (S1) ◽  
pp. S9-S20 ◽  
Author(s):  
Giulio Lorenzini ◽  
Daniel Helbig ◽  
Caio Cesar Cardoso Da Silva ◽  
Mauro De Vasconcellos Real ◽  
Elizaldo Domingues Dos Santos ◽  
...  
Keyword(s):  
Numerical Evaluation ◽  
Design Method ◽  
Steel Plates ◽  
Constructal Design ◽  
Thin Steel

scholarly journals Computational Modeling and Constructal Design Theory Applied to the Geometric Optimization of Thin Steel Plates with Stiffeners Subjected to Uniform Transverse Load

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 220 ◽  
Author(s):  
Grégori Troina ◽  
Marcelo Cunha ◽  
Vinícius Pinto ◽  
Luiz Rocha ◽  
Elizaldo dos Santos ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Design Theory ◽  
Degrees Of Freedom ◽  
Volume Fraction ◽  
Geometric Optimization ◽  
Steel Plates ◽  
Transverse Load ◽  
Constructal Design ◽  
Thin Steel ◽  
Reference Plate

Stiffened thin steel plates are structures widely employed in aeronautical, civil, naval, and offshore engineering. Considering a practical application where a transverse uniform load acts on a simply supported stiffened steel plate, an approach associating computational modeling, Constructal Design method, and Exhaustive Search technique was employed aiming to minimize the central deflections of these plates. To do so, a non-stiffened plate was adopted as reference from which all studied stiffened plate’s geometries were originated by the transformation of a certain amount of steel of its thickness into longitudinal and transverse stiffeners. Different values for the stiffeners volume fraction (φ) were analyzed, representing the ratio between the volume of the stiffeners’ material and the total volume of the reference plate. Besides, the number of longitudinal (Nls) and transverse (Nts) stiffeners and the aspect ratio of stiffeners shape (hs/ts, being hs and ts, respectively, the height and thickness of stiffeners) were considered as degrees of freedom. The optimized plates were determined for all studied φ values and showed a deflection reduction of over 90% in comparison with the reference plate. Lastly, the influence of the φ parameter regarding the optimized plates was evaluated defining a configuration with the best structural performance among all analyzed cases.

Geometric evaluation of steel plates subjected to uniform transverse load with rectangular or trapezoidal stiffeners by means constructal design method

2020 ◽  
Vol 3 (2) ◽  
pp. 190
Author(s):  
Vinícius Torres Pinto ◽  
Marcelo Langhinrichs Cunha ◽  
Kauê Louro Martins ◽  
Luiz Alberto Oliveira Rocha ◽  
Mauro De Vasconcellos Real ◽  
...  
Keyword(s):  
Design Method ◽  
Steel Plates ◽  
Transverse Load ◽  
Constructal Design

Computational modeling and constructal design method applied to the mechanical behavior improvement of thin perforated steel plates subject to buckling

2016 ◽  
Vol 25 (2) ◽  
pp. 197-215 ◽  
Author(s):  
G. Lorenzini ◽  
D. Helbig ◽  
M. de V. Real ◽  
E. D. dos Santos ◽  
L. A. Isoldi ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Mechanical Behavior ◽  
Design Method ◽  
Steel Plates ◽  
Constructal Design
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