A optimization technique for the composite strut using genetic algorithms

Zhu, Xiaolei; He, Rujie; Lu, Xiaofeng; Ling, Xiang; Zhu, Lingxue; Liu, Bin

doi:10.1016/j.matdes.2014.09.039

Cited by 25 publications

(10 citation statements)

References 17 publications

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“…Chen et al [45] used a combination of PSO and finite element analysis to optimize composite structures based on reliability design optimization. Zhu et al [46] considered the optimization of composite strut using the GA method and Tsai-Wu failure criterion [47]. They paid attention to minimizing the weight of the structure and increasing the buckling load.…”

Section: Literature Reviewmentioning

confidence: 99%

Optimum Design of Infinite Perforated Orthotropic and Isotropic Plates

et al. 2020

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In this study, an attempt was made to introduce the optimal values of effective parameters on the stress distribution around a circular/elliptical/quasi-square cutout in the perforated orthotropic plate under in-plane loadings. To achieve this goal, Lekhnitskii’s complex variable approach and Particle Swarm Optimization (PSO) method were used. This analytical method is based on using the complex variable method in the analysis of two-dimensional problems. The Tsai–Hill criterion and Stress Concentration Factor (SCF) are taken as objective functions and the fiber angle, bluntness, aspect ratio of cutout, the rotation angle of cutout, load angle, and material properties are considered as design variables. The results show that the PSO algorithm is able to predict the optimal value of each effective parameter. In addition, these parameters have significant effects on stress distribution around the cutouts and the load-bearing capacity of structures can be increased by appropriate selection of the effective design variables. The main innovation of this study is the use of PSO algorithm to determine the optimal design variables to increase the strength of the perforated plates. Finite element method (FEM) was employed to examine the results of the present analytical solution. The results obtained by the present solution are in accordance with numerical results.

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Section: Literature Reviewmentioning

confidence: 99%

Optimum Design of Infinite Perforated Orthotropic and Isotropic Plates

et al. 2020

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“…where E is the modulus of elasticity, I is the area moment of inertia, l is the free strut length and µ depends on the support of the strut ends. For fiberreinforced composites, the equation of Euler is not sufficiently accurate and can be extended by the following formulation as described by Lee and Hewson (1979) and confirmed by Zhu et al (2015) for CFRP pipes with various stacking sequences and a length and inside diameter of 1.5 and 0.05 m, respectively. In addition, the shear deformation E L /G L T is taken into account to achieve sufficiently accurate…”

Section: Strutsmentioning

confidence: 99%

“…The parameter E L is the longitudinal modulus of elasticity in the direction of the strut, G L T the longitudinal transverse shear modulus of the strut and the empirical constants a = 0.6723, b = 0.3235, c = 6.03 and d = 0.091. Depending on the stacking sequence, Zhu et al (2015) found in a case study that Equation 1had an error of 2%-190% compared to finite element method (FEM) simulations. The extended formulation had an error of 1%-20% compared to the FEM results.…”

Section: Strutsmentioning

confidence: 99%

“…For fiber-reinforced composites, the equation of Euler is not sufficiently accurate and can be extended by the following formulation as described by Lee and Hewson (1979) and confirmed by Zhu et al. (2015) for CFRP pipes with various stacking sequences and a length and inside diameter of 1.5 and 0.05 m, respectively. In addition, the shear deformation is taken into account to achieve sufficiently accurate results: The parameter is the longitudinal modulus of elasticity in the direction of the strut, the longitudinal transverse shear modulus of the strut and the empirical constants , , and .…”

Section: State Of the Artmentioning

confidence: 99%

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A rapid CAE-based design method for modular hybrid truss structures

2019

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The development of hybrid trusses made of carbon-fiber-reinforced plastic struts and aluminum knots is currently not standardized, and there is no overall method for the design, although it has been proven that mass reduction is feasible. This paper introduces a new method for computer-aided engineering based design of hybrid trusses using carbon-fiber-reinforced plastic struts and metal nodes based on a modular system. The method includes all design steps from topology optimization to computer-aided design model generation and offers support to the engineer. The method is discussed in theory. A case study is done with a beam-shaped truss. It shows that if the bisection optimization method is combined with further constraints, it is suitable for selecting the optimum struts from a modular system for the truss. The developed approach is a suitable method for designing hybrid trusses. The basis of the method has been developed and will be further detailed and extended.

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“…Research and innovations in DLG space trusses witness continuous changes. New trends for using composite materials Fibre Reinforced Plastic (FRP) and Carbon Fiber Reinforced (CFRP) polymers are introduced to be used in the design of DLG space structures for large varieties in practical applications such as bridges, sandwich panel or even bridge deck (Dong et al, 2012;Awad et al, 2012;Soudki et al, 2012;Zhu et al, 2015). Novel techniques are also developed for joint assembly for all composite space structures (Bai and Yang, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of floor openings on the capacity of composite space trusses

El-Shami

Mahmoud

Elabd

2018

Journal of King Saud University - Engineering Sciences

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Presenting the composite deck, which consists of concrete slab with profiled steel sheets fixed to the top layer of Double Layer Grid (DLG), proved its great efficiency in increasing the load carrying capacity for this type of structures. Earlier studies concluded that the application of the prescribed composite action had solved many problems facing the spread of DLG structures such as their prone to collapse in a progressive manner besides their suitability to be used only as roof covering structures. In addition, the application of the composite action introduced an economical solution due to considerable savings in steel material used in building the top layer of the DLG structures. However, openings in the deck are needed for architectural purposes such as passing service ducts, day-lighting panels or passing shear walls or continuous structural elements. Adding such openings in the deck affects the efficiency of the composite deck in carrying the assigned loads especially if the openings are being added after the construction is completed. The current research introduced experimental tests along with numerical investigation using ABAQUS software for composite deck space trusses with common cases of support patterns and different deck opening locations. The study shows the obvious effect of the existence of openings and their locations on the load carrying capacity and ductility of DLG space structures. Ó 2016 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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A optimization technique for the composite strut using genetic algorithms

Cited by 25 publications

References 17 publications

Optimum Design of Infinite Perforated Orthotropic and Isotropic Plates

Optimum Design of Infinite Perforated Orthotropic and Isotropic Plates

A rapid CAE-based design method for modular hybrid truss structures

Effect of floor openings on the capacity of composite space trusses

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