Vibration and buckling behaviours of thin-walled composite and functionally graded sandwich I-beams

Nguyen, Ngoc-Duong; Nguyen, Thanh Thuy; Vo, Thuc P.; Nguyen, Thien-Nhan; Lee, Seunghye

doi:10.1016/j.compositesb.2019.02.033

Cited by 40 publications

(17 citation statements)

References 50 publications

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“…For open-section profiles, angle-ply laminates obtained a higher buckling load than quasi-isotropic laminates [ 113 ]. The buckling capacity of these profiles was decreasing when the fibre angle was increased and the cross-ply laminates were observed to sustain a larger buckling load than angle-ply when the fibre angle is larger than

[ 58 , 80 ]. It was found that the effect of the stacking sequence on the buckling capacity of laminated plates decreases as their dimensions are increased [ 128 ] but it becomes significant in open-section structural-level columns with slender walls [ 140 ].…”

Section: Layup Parameters Of Hollow Box Pfrp Profilesmentioning

confidence: 99%

Review on Local Buckling of Hollow Box FRP Profiles in Civil Structural Applications

et al. 2021

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Hollow box pultruded fibre-reinforced polymers (PFRP) profiles are increasingly used as structural elements in many structural applications due to their cost-effective manufacturing process, excellent mechanical properties-to-weight ratios, and superior corrosion resistance. Despite the extensive usage of PFRP profiles, there is still a lack of knowledge in the design for manufacturing against local buckling on the structural level. In this review, the local buckling of open-section (I, C, Z, L, T shapes) and closed-section (box) FRP structural shapes was systematically compared. The local buckling is influenced by the unique stresses distribution of each section of the profile shapes. This article reviews the related design parameters to identify the research gaps in order to expand the current design standards and manuals of hollow box PFRP profiles and to broaden their applications in civil structures. Unlike open-section profiles, it was found that local buckling can be avoided for box profiles if the geometric parameters are optimised. The identified research gaps include the effect of the corner (flange-web junction) radius on the local buckling of hollow box PFRP profiles and the interactions between the layup properties, the flange-web slenderness, and the corner geometry (inner and outer corner radii). More research is still needed to address the critical design parameters of layup and geometry controlling the local buckling of pulwound box FRP profiles and quantify their relative contribution and interactions. Considering these interactions can facilitate economic structural designs and guidelines for these profiles, eliminate any conservative assumptions, and update the current design charts and standards.

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Section: Layup Parameters Of Hollow Box Pfrp Profilesmentioning

confidence: 99%

Review on Local Buckling of Hollow Box FRP Profiles in Civil Structural Applications

et al. 2021

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“…where U j , V j , W j and φ j are unknown and need to be determined; ϕ j (x) are approximation functions [21]. It should be noted that these approximation functions in Table 1…”

Section: Ritz Solutionmentioning

confidence: 99%

“…Vo and Lee [16,17] used FEM for flexural-torsional stability analysis of thin-walled composite beams. In recent years, buckling behaviours of thin-walled functionally grade open section beams are also analysed [18][19][20][21]. It can be seen that Ritz method has seldom been used to analyse the buckling problem of thin-walled composite channel beams.…”

Section: Introductionmentioning

confidence: 99%

Ritz solution for buckling analysis of thin-walled composite channel beams based on a classical beam theory

Duong

Kiên

Nhan³

2019

STCE

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Buckling analysis of thin-walled composite channel beams is presented in this paper. The displacement field is based on classical beam theory. Both plane stress and plane strain state are used to achieve constitutive equations. The governing equations are derived from Lagrange's equations. Ritz method is applied to obtain the critical buckling loads of thin-walled beams. Numerical results are compared to those in available literature and investigate the effects of fiber angle, length-to-height's ratio, boundary condition on the critical buckling loads of thin-walled channel beams.

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“…It was found that the critical buckling load decreased by 35% when the fibre angle increased from 10° to 30° for the unidirectional composite profile [20]. The cross-ply laminate was observed to sustain a larger buckling load than angle-ply laminate when the fibre angle is larger than 30 [21,22]. In general, balanced and symmetric laminate is preferred to minimise the manufacturing imperfection and limit the elastic coupling effect and warp [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…The buckling load capacity of filament-wound Glass Fibre-Reinforced Polymer (GFRP) profiles subjected to compression was increased by 20% when the winding angle was increased from 30 to 60 [19]. The effect of the fibres orientation on the buckling load of FRP composite profiles made with unidirectional [20], angle-ply, and cross-ply [21,22] layups and subjected to axial compression was studied numerically. It was found that the critical buckling load decreased by 35% when the fibre angle increased from 10° to 30° for the unidirectional composite profile [20].…”

Section: Introductionmentioning

confidence: 99%

Modelling flexural performance of hollow pultruded FRP profiles

Alhawamdeh

Alajarmeh

Aravinthan

et al. 2021

Composite Structures

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Hollow Pultruded Fibre-Reinforced Polymer (PFRP) profiles, as novel construction material, require further development of design tool to broaden the applications. This paper proposes a combined experimental and numerical methodology as a design tool to investigate the failure modes of these profiles under four-point bending. Two different profiles, each with 10 samples, were tested until failure and were used to validate the numerical model. A finite element model was built based on a fast-convergence incremental approach that suits flexural loading and reduces the computational cost. The validated model was used to study the failure sequence thoroughly and perform an extensive parametric study on the design parameters. Each geometric parameter was studied individually first to determine the relevant levels for each parameter in the full factorial study. A full factorial design of experiment was used to capture the critical parametric interactions with over 81 numerical models. The design rules and recommendation were established for the optimal flexural behaviour of hollow box PFRP profiles to withstand local buckling of the top flange.

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Vibration and buckling behaviours of thin-walled composite and functionally graded sandwich I-beams

Cited by 40 publications

References 50 publications

Review on Local Buckling of Hollow Box FRP Profiles in Civil Structural Applications

Review on Local Buckling of Hollow Box FRP Profiles in Civil Structural Applications

Ritz solution for buckling analysis of thin-walled composite channel beams based on a classical beam theory

Modelling flexural performance of hollow pultruded FRP profiles

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