Determination of critical load for flange buckling in concentrically loaded pultruded columns

Mottram, J. T.

doi:10.1016/j.compositesb.2003.08.006

Cited by 59 publications

(10 citation statements)

References 15 publications

(86 reference statements)

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“…Thus, in order to understand the mechanical properties of the I-and P-beams, the three-point or four-point flexure is generally adopted to conduct the static tests for determining mechanical properties of the I-and Pbeams. 2,4,8,[13][14][15] This paper, therefore, attempts to provide an insight into failure development in hybrid RTM-made composite I-and P-beams through three-point flexure tests and to achieve new progressive damage models for predicting structural behaviors of hybrid RTM-made composite I-and P-beams for engineering application.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, analytical solutions were developed based on the CLT (Classical lamination theory) 4-6 , Vlasov-type linear theory 7,8 and Timoshenko beam theory 9 to predict static response of composite I-beams under different loading conditions and the effects of several factors were discussed on structural properties of composite I-beams. Barbero et al 4 predicted critical buckling load in the compressive flange of GFRP (Glass Fiber Reinforced Plastic) I-beams subjected to three-and four-point bending loading based on CLT and found that the critical buckling load of the flange was a function of the wavelength.…”

Section: Introductionmentioning

confidence: 99%

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Static mechanical properties of hybrid RTM-made composite I- and Π-beams under three-point flexure

Xiong

Luo

et al. 2015

Chinese Journal of Aeronautics

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This paper deals with three-point flexure tests on hybrid I-and P-beams, made out of multi-layer carbon fiber/epoxy resin (including twill woven fabric CF3031/5284 and unidirectional cord fabric U3160/5284) reinforced composites, processed using the RTM (resin transfer molding) technique. Static bending properties were determined and failure initiation mechanism was deduced from experimental observations. Failure mode of the tested hybrid RTM-made I-beams can be reckoned to be characteristic of the delamination from the cutout edge within the web and the debonding propagation along the interface between the inverted triangular resin-rich zone and the adjacent curved web until local buckling within the curved webs around the conjunction fillet region. In contrast, as distinct from hybrid RTM I-beams subjected to three-point bending loading, hybrid RTM-made P-beams in three-point flexure tests experienced the resin debonding in the inverted triangular resin-rich zones and the debonding propagation along the interface between the inverted triangular resin-rich zone and the adjacent curved web until complete separation of the curved web from the flange. Progressive damage models (PDMs) were presented to predict failure loads and process of hybrid RTM-made I-and P-beams under three-point flexure. Good correlation was achieved between experimental and numerical results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Static mechanical properties of hybrid RTM-made composite I- and Π-beams under three-point flexure

Xiong

Luo

et al. 2015

Chinese Journal of Aeronautics

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“…Several closed form equations to calculate the critical load for different loading conditions are available in literature [10,12,13,14]. Kollar [10], for instance, presented explicit expressions considering the cross-section comprised of orthotropic plates with rotationally restrained edges.…”

Section: Introductionmentioning

confidence: 99%

Local Buckling of Pultruded GFRP I-Section Subject to Bending

Vieira¹,

Vieira²,

Cardoso³

2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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The use of pultruded glass fiber reinforced polymer (pGFRP) has increased significantly in the last few years, especially in aggressive environments. The structural performance of pGFRP members is strongly dependent on their buckling behavior, because of the association of low elastic properties and relatively thin-walled sections adopted. The aim of this study is to present the results of an ongoing experimental work focused on evaluating the local buckling behavior of GFRP I-beams subject to 4-point bending tests. Lateral deflections were measured with displacement transducers and the curvature at compression flange during loading was measured with back-to-back strain gages. A finite element model using actual material properties and bracing conditions was adopted to ensure behavior governed by local buckling and to determine critical bending moment. The influence of web-to-flange rotational stiffness on the behaviour is discussed and, finally, experimental critical loads obtained using Southwell and Koiter techniques are compared to those obtained using analytical expressions recently proposed in literature and to computational analysis 1.

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“…Consequently, the buckling behaviour of pultruded GRP profiles has been the subject of intensive research, especially over the past decade. A large number of analytical and experimental investigations of the buckling behaviour of open and closed-section pultruded GRP profiles subject to uniform uni-axial compression have been completed [3][4][5][6][7][8][9][10][11][12][13][14] and several design formulae have been proposed for predicting their buckling loads [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Local buckling of axially compressed fully and partially stiffened GRP short columns: A comparison of Experimental and FE Analysis

Afifi

Turvey

2010

The International Conference on Applied Mechanics and Mechanica

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Linear and nonlinear Finite Element (FE) analyses and experimental work on local buckling of un-stiffened, fully stiffened and partially stiffened full scale pultruded GRP profiles under uniform axial compression are presented. An investigation on improving the buckling capacity of I-section pultruded profile by bonding high modulus unidirectional CFRP strips to the top and bottom surface of the flanges along their free edges is carried out. The experimental buckling load for short columns with clamped ends (CC) have been evaluated using Southwell plots of deflection and bending strain test data. The experimental buckling loads have been also evaluated using the load versus endshortening graphs. The predicted buckling loads obtained from FE analyses are compared with the experimental results and good agreement has been achieved. It has been shown that, the use of stiffeners generally produces a significant increase in the local buckling load and a significant shift in the buckling mode.

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Determination of critical load for flange buckling in concentrically loaded pultruded columns

Cited by 59 publications

References 15 publications

Static mechanical properties of hybrid RTM-made composite I- and Π-beams under three-point flexure

Static mechanical properties of hybrid RTM-made composite I- and Π-beams under three-point flexure

Local Buckling of Pultruded GFRP I-Section Subject to Bending

Local buckling of axially compressed fully and partially stiffened GRP short columns: A comparison of Experimental and FE Analysis

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