Buckling and postbuckling behaviour of thin-walled composite channel section column

Dębski, H.; Kubiak, Tomasz; Teter, Andrzej

doi:10.1016/j.compstruct.2012.12.033

Cited by 54 publications

(37 citation statements)

References 30 publications

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“…It seems highly probable that this undesired effect can be considerably reduced by the application of the material with orthotropic properties as it enables tailoring the material's operating characteristics as desired, depending on a region. Such properties are possessed, among others, by fibrous composites whose strength properties and rigidity can be shaped as required, hence they can be used to produce structures with improved load carrying capacity [4][5][6][7]26]. This problem will be investigated in further research.…”

Section: Discussion Of the Numerical Resultsmentioning

confidence: 99%

“…This way of shaping elastic properties of plates is particularly important if such structures are to be used for various designs. Owing to considerable displacements that occurred when the plate was under load, the numerical analysis also involved solving the problem of geometric nonlinearity using the Newton-Raphson method [1,4,5]. The numerical analysis was performed using the FE-based commercial software ABAQUS ® [1].…”

Section: Research Object and Scopementioning

confidence: 99%

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Numerical analysis of compressed plates with a cut-out operating in the geometrically nonlinear range

Falkowicz¹,

Ferdynus²,

Dębski³

2015

Eksploatacja i Niezawodnosc - Maintenance and Reliability

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Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionThin-walled load-carrying structures are characterized by high strength and rigidity as well as low weight. Given the above properties, these structures are widely applied not only in the aerospace and automotive sectors, but also in designs where low structure weight is crucial. A disadvantage of thin-walled structures is that they are prone to loss of stability under compressive or shearing loads [2, 3, 9, 13, 21-25, 28, 29]. Nonetheless, thin-walled structural elements can operate even after their stability loss provided that they do it in the elastic range [11,14,21,27]. These structures are particularly sensitive to geometric inaccuracies, which is critical regarding their use. For this reason, they must be precisely manufactured to prevent premature loss of stability. Uniform thin-walled plates are relatively cheap to produce, yet they can carry relatively low loads due to their low flexural rigidity. When subjected to compression, these plates lose stability even under small loads. With common methods for improving load capacity such as the use of stiffeners or ribs, the form of a structure is not only considerably modified, but its weight can increase, too. However, there is a way in which load capacity of thin-walled structures can be greatly improved while the structures themselves can be used as both carrying structures and elastic elements. This can be done by forcing these structures to operate in a higher buckling mode (flexural and torsional). To do so, it is necessary to make a cut-out in the plate and slightly displace the vertical zone in the opposite direction. This displacement will be realized in a special frame -so that the jump on basic mode was impossible. In this way, the plate acquires the desired characteristics, i.e. stable operation in the post-buckling range.Issues of the stability and post-buckling behaviors of plate structure with all sorts of holes was described in [19], where you can find a very comprehensive review of the literature on this issue. At that work as the author of the earliest elaboration, in numerical terms, is given Pennington Vanna [16], who as first considered the problem of the stability of elastic uniaxially compression plate with a cut-out. The article presents the results of FEM calculations and compared to the results of experimental studies. The earliest post-buckling behavior analysis of plate structures with cut-out are reported in [18]. A major contribution brings the works [15,17,20,30], where are considered the postcritical states and limited carrying capacity of this type of structures. Not encountered of research, where was investigated plate structures with cut-out and in which attempted to force of the higher flexural and torsional mode deformation of the structure.In the researched load-carrying structure, one can clearly distinguish a vertical zone where this thin-walled element undergoes com...

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Section: Discussion Of the Numerical Resultsmentioning

confidence: 99%

Section: Research Object and Scopementioning

confidence: 99%

Numerical analysis of compressed plates with a cut-out operating in the geometrically nonlinear range

Falkowicz¹,

Ferdynus²,

Dębski³

2015

Eksploatacja i Niezawodnosc - Maintenance and Reliability

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“…The speed of the system free fall was monitored by the braking system consisting, among others, of the speed limiter. During measurements the device was controlling the speed of the tested system on the basis of empirical relationship (3). (3) where: g -acceleration of gravity 9,81 m/s 2 , h -free fall height measured from the fall starting point to the moment when the speed limiter was activated; Measurements results of braking distance were obtained by means of taking the average for measurements received after ten successive mea- suring tests conducted one after another for the free fall of the tested system.…”

Section: Characteristic Of Test Bench and Testing Methodologymentioning

confidence: 99%

“…Furthermore, the authors of the literature [1,3] raise the issues of buckling thin-walled structures and laminated structures using FEM analysis, the results of which are used in various constructions.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis of Loading Impact From the Progressive Gear on the Lift Braking Distance With the Use of the Free Fall Method

Lonkwic¹,

Różyło²

2016

Adv. Sci. Technol. Res. J.

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The gear which is the central safety element of the friction drive lift during braking is exposed to overloading connected with changeable weight which loads the lift braking system. In the article the results of numerical analysis for braking process of CHP 2000 type progressive gear distinguished by an innovative design have been presented. The numerical analysis was conducted with the use of a simulation of the gear roller displacement depending on changeable loading with the support of Abaqus/ CAE software. Displacement of the gear roller from the neutral position in which the gear starts loosing energy of speeding up weight to zero was simulated. The results obtained from computer simulations were verified on the basis of a physical experiment at the bench station created to verify braking parameters of the gears with the use of free fall method.

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“…Theoretical and numerical studies of stability problems are verified experimentally too [1,6,7,25,28]. Nowadays, the software based on finite element method (FEM) or semi-analytical method (SAM) [7,17] and [5] is applied to solve a variety of stability problems. Nevertheless, in initial structural design, sensitivity analysis or optimal design analytical closed-form solution of specific problems is convenient.…”

Section: Introductionmentioning

confidence: 99%

Local buckling of composite channel columns

Szymczak

Kujawa

2018

Continuum Mech. Thermodyn.

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The investigation concerns local buckling of compressed flanges of axially compressed composite channel columns. Cooperation of the member flange and web is taken into account here. The buckling mode of the member flange is defined by rotation angle a flange about the line of its connection with the web. The channel column under investigation is made of unidirectional fibre-reinforced laminate. Two approaches to member orthotropic material modelling are performed: the homogenization with the aid of theory of mixture and periodicity cell or homogenization upon the Voigt-Reuss hypothesis. The fundamental differential equation of local buckling is derived with the aid of the stationary total potential energy principle. The critical buckling stress corresponding to a number of buckling half-waves is assumed to be a minimum eigenvalue of the equation. Some numerical examples dealing with columns are given here. The analytical results are compared with the finite element stability analysis carried out by means of ABAQUS software. The paper is focused on a close analytical solution of the critical buckling stress and the associated buckling mode while the web-flange cooperation is assumed. Keywords Fibre composites · Channel column · Analytical solution · FEM List of symbols

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Buckling and postbuckling behaviour of thin-walled composite channel section column

Cited by 54 publications

References 30 publications

Numerical analysis of compressed plates with a cut-out operating in the geometrically nonlinear range

Numerical analysis of compressed plates with a cut-out operating in the geometrically nonlinear range

Theoretical and Experimental Analysis of Loading Impact From the Progressive Gear on the Lift Braking Distance With the Use of the Free Fall Method

Local buckling of composite channel columns

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