Local buckling and post-buckling of composite channel-section beams – Numerical and experimental investigations

Kubiak, Tomasz; Kołakowski, Zbigniew; Świniarski, Jacek; Urbaniak, Mariusz; Gliszczyński, Adrian

doi:10.1016/j.compositesb.2016.01.053

Cited by 72 publications

(29 citation statements)

References 34 publications

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“…According to the authors, the design methods were found to be conservative. It is also worth reporting the interesting study carried out by Kubiak et al [11] in non-pultruded composite channel sections. To ensure local buckling due to 'pure' flexure, i.e.…”

Section: Introductionmentioning

confidence: 92%

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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Section: Introductionmentioning

confidence: 92%

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 real grips ( Figure 2b) were made of aluminum block [34], but in the numerical model it was decided to model it as a thin-walled beam with a rectangular cross-section ( Figure 4 The load in the developed model was set to the nodes lying on load lines presented in Figure 4a. Additionally, at all the loaded nodes the constant value of vertical displacements (uz = const.)…”

Section: Numerical Modelmentioning

confidence: 99%

The Influence of the Layer Arrangement on the Distortional Post-Buckling Behavior of Open Section Beams

2020

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The paper deals with the design of the stacking sequence of layers in the laminate beams with open-cross sections in order to create the desired behavior in the post-buckling range. Laminate beams with channel and lipped channel cross-sections made of glass fiber reinforced polymer (GFRP) laminate with different layer arrangements (symmetrical and nonsymmetrical) have been considered. In case of the nonsymmetrical stacking sequences, hygro-thermally curvature stable (HTCS) laminates have been taken into account. Pure bending was assumed as the type of load. In the case of beams with open cross-sections, this load type can cause the lateral-distortional buckling mode. A parametric study was performed to analyze the influence of layer arrangement on post-buckling behavior. The finite element method was used to developed numerical models and conduct simulations. Additionally, the experimental tests of the channel section beams were performed in order to validate the developed numerical models.

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“…A classic example of load-carrying FRP composite structural components is thin-walled profiles with open or closed sections that are used to stiffen fuselages of airplanes [1,2]. These profiles are high load-carrying capacity structural components subjected primarily to axial or bending loads [3][4][5][6]. The description of problems recently considered for modern composite materials can be found, for instance, in [7][8][9], where the authors present mainly experimental research on the failure of the composite material.…”

Section: Introductionmentioning

confidence: 99%

Stability and Load-Carrying Capacity of Thin-Walled FRP Composite Z-Profiles under Eccentric Compression

et al. 2020

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This study investigates the effect of eccentric compressive load on the stability, critical states and load-carrying capacity of thin-walled composite Z-profiles. Short thin-walled columns made of carbon fiber-reinforced plastic composite material fabricated by the autoclave technique are examined. In experimental tests, the thin-walled structures were compressed until a loss of their load-carrying capacity was obtained. The test parameters were measured to describe the structure’s behavior, including the phenomenon of composite material failure. The post-critical load-displacement equilibrium paths and the acoustic emission signal enabling analysis of the composite material condition during the loading process were measured. The scope of the study also included performing numerical simulations by finite element method to solve the problem of non-linear stability and to describe the phenomenon of composite material damage based on the progressive failure model. The obtained numerical results showed a good agreement with the experimental characteristics of real structures. The numerical results are compared with the experimental findings to validate the developed numerical model.

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Local buckling and post-buckling of composite channel-section beams – Numerical and experimental investigations

Cited by 72 publications

References 34 publications

Local Buckling of Pultruded GFRP I-Section Subject to Bending

Local Buckling of Pultruded GFRP I-Section Subject to Bending

The Influence of the Layer Arrangement on the Distortional Post-Buckling Behavior of Open Section Beams

Stability and Load-Carrying Capacity of Thin-Walled FRP Composite Z-Profiles under Eccentric Compression

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