Optimum design of thin-walled composite beams for flexural–torsional buckling problem

Nguyễn, Xuân Hùng; Kim, Namil; Lee, Jae Hong

doi:10.1016/j.compstruct.2015.06.036

Cited by 18 publications

(9 citation statements)

References 14 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This improvement effectively increases the optimal solution and convergence rate of the optimising procedure which results in significant reduction in computational cost. Recently, Nguyen et al [32] presented an optimisation study of composite I-section beams by maximising the critical flexural-torsional buckling load using micro-GA. As far as authors are aware, there is no work available on the optimum design of composite channel-section beams using mirco-GA for vibration and lateral buckling problems.…”

Section: Introductionmentioning

confidence: 99%

Vibration and lateral buckling optimisation of thin-walled laminated composite channel-section beams

Nguyễn

Lee

et al. 2016

Composite Structures

Self Cite

View full text Add to dashboard Cite

Citation: Nguyen, Hoang, Lee, Jaehong, Vo, Thuc and Lanc, Domagoj (2016) Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) AbstractThis study presents vibration and lateral buckling optimisation of thin-walled laminated composite beams with channel sections. While flanges' width, web's height, and fibre orientation are simultaneously treated as design variables, the objective function involves maximising the fundamental frequency and critical buckling moment. Based on the classical beam theory, the beam element with seven degrees of freedom at each node is developed to solve the problem. Micro Genetic Algorithm (micro-GA) is then employed as an optimisation tool to obtain optimal results. A number of composite channel-section beams with different types of boundary conditions, span-to-height ratios, and lay-up schemes are investigated for the optimum design. The outcomes reveal that geometric parameters severely govern the optimal solution rather than the fibre orientation and it is considerably effective to use micro-GA compared with regular GA in term of optimal solution and convergence rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Vibration and lateral buckling optimisation of thin-walled laminated composite channel-section beams

Nguyễn

Lee

et al. 2016

Composite Structures

Self Cite

View full text Add to dashboard Cite

show abstract

“…The buckling loads were determined considering the base state of the structure—that is, the state of the load for which the eigenvalues are determined. In the base state, the structure may have initial loads P, stemming from previous analyses or initial conditions [ 2 , 7 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. The process of determining the critical force is divided into two stages.…”

Section: Purpose and Methodology Of Researchmentioning

confidence: 99%

Optimisation of the Thin-Walled Composite Structures in Terms of Critical Buckling Force

Szklarek

Gajewski

2020

Materials

View full text Add to dashboard Cite

The paper presents the optimisation of thin-walled composite structures on a representative sample of a thin-walled column made of carbon laminate with a channel section-type profile. The optimisation consisted of determining the configuration of laminate layers for which the tested structure has the greatest resistance to the loss of stability. The optimisation of the layer configuration was performed using two methods. The first method, divided into two stages to reduce the time, was to determine the optimum arrangement angle in each laminate layer using finite element methods (FEM). The second method employed artificial neural networks for predicting critical buckling force values and the creation of an optimisation tool. Artificial neural networks were combined into groups of networks, thereby improving the quality of the obtained results and simplifying the obtained neural networks. The results from computations were verified against the results obtained from the experiment. The optimisation was performed using ABAQUS® and STATISTICA® software.

show abstract

“…where E m (X, Y), E mb (X, Y) and E b (X, Y) are the membrane, coupling and bending stiffness matrices of the Classical Laminate Analysis as introduced previously in eq. (5). Note that due to the variable stiffness design of the panel these terms are functions of location (X, Y).…”

Section: Plate Element For Dqmmentioning

confidence: 99%

“…Hence, a realistic evaluation of the structural performance of thin-walled structures requires nonlinear phenomena, such as the loss of stability, to be correctly accounted for [1]. Above all, in the case of careful structural optimization [2][3][4][5][6][7], multimodal buckling interaction [8] can induce complex post-critical behavior that strongly affects the load carrying capacity [9]. In this case the sensitivity of the structural behavior to imperfections has to be carefully investigated.…”

Section: Introductionmentioning

confidence: 99%

Mixed shell element for static and buckling analysis of variable angle tow composite plates

Zucco

Groh

Madeo

et al. 2016

Composite Structures

View full text Add to dashboard Cite

A mixed quadrilateral 3D finite element, obtained from the Hellinger-Reissner functional, is presented for linear static and buckling analyses of variable-angle tow (VAT) composite plates. Variable-angle tows describe curvilinear fiber paths within composite laminae and are a promising technology for tailoring the buckling and post-buckling capability of plates. Due to the variable stiffness across the planform of the VAT plates, pre-buckling stresses can be tailored and redistributed towards supported edges, thereby greatly improving the buckling load. A linear mixed element called MISS-4 is used as starting point for this work. The element presents a self-equilibrated and isostatic state of stress. The kinematics lead to element compatibility matrix calculations based solely on the interpolation along element edges. The drilling rotations do not require penalty functions or non-symmetric formulations, thus avoiding spurious energy modes. The buckling analysis is reliably performed via a co-rotational formulation. In this work VAT plates with linear fibre angle variation in one direction, and constant stiffness properties in the orthogonal direction are studied. Numerical examples of VAT plates subjected to different loads and boundary conditions are investigated herein. The convergence of displacements, stress resultants and buckling loads are presented, and comparisons with numerical results, obtained using the S4R finite element of Abaqus and the pseudo-spectral differential quadrature method, are shown.

show abstract

Optimum design of thin-walled composite beams for flexural–torsional buckling problem

Cited by 18 publications

References 14 publications

Vibration and lateral buckling optimisation of thin-walled laminated composite channel-section beams

Vibration and lateral buckling optimisation of thin-walled laminated composite channel-section beams

Optimisation of the Thin-Walled Composite Structures in Terms of Critical Buckling Force

Mixed shell element for static and buckling analysis of variable angle tow composite plates

Contact Info

Product

Resources

About