Experimental study on the effect of eccentric compressive load on the stability and load-carrying capacity of thin-walled composite profiles

Dębski, H.; Różyło, Patryk; Wysmulski, Paweł; Falkowicz, Katarzyna; Ferdynus, Mirosław

doi:10.1016/j.compositesb.2021.109346

Cited by 34 publications

(22 citation statements)

References 37 publications

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“…The columns were discretized, with the use of shell elements, and each element having three translational and three rotational degrees of freedom in every node. The numerical models of the columns were constructed with S8R finite elements, which are eight-node elements with a quadratic shape function and reduced integration [ 30 , 33 , 38 , 39 ]. The plates reproducing the simple support on the column ends were modelled using four-node rigid finite elements, R3D4.…”

Section: Methodology Of the Studymentioning

confidence: 99%

“…The object of this study were short thin-walled columns with a channel cross-section under axial and eccentric compression. The columns were standard thin-walled structures with perpendicular walls; they were flat plate elements joined by their longer ends [ 33 , 38 , 39 , 50 , 51 , 52 , 53 , 54 ]. The columns were fabricated from epoxy/carbon laminate by autoclaving ( Figure 1 a).…”

Section: Object Of the Studymentioning

confidence: 99%

“…The load that causes columns to buckle is known as the critical load, its value being dependent on many factors. These factors include the following: the column’s cross-sectional shape and dimensions, its length, boundary conditions, and—for composite materials—the ply layup in the column’s walls and web [ 35 , 36 , 37 , 38 , 39 ]. Knowledge of the critical load value is of vital importance when designing thin-walled structures, because it allows taking measures to prevent these structures from buckling within the service load range.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity of Compressed Composite Channel Columns to Eccentric Loading

2022

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This study investigated short thin-walled channel columns made of carbon/epoxy laminate. Columns with two multi-ply composite layups [0/45/−45/90]s and [90/−45/45/0]s were tested, with each layup having eight plies symmetric to the midplane. The columns were subjected to compressive loads, including an eccentric compressive load applied relative to the center of gravity of their cross-section. Simple support boundary conditions were applied to the ends of the columns. The scope of the study included analyzing the effect of load eccentricity on the buckling mode, bifurcation load (idealized structure), and critical load (structure with initial imperfections). The critical load for the actual structure was determined with the use of approximation methods, based on experimental postbuckling equilibrium paths. In parallel with the experiments, a numerical analysis was conducted using the finite element method and Abaqus® software (Dassault Systèmes, Vélizy-Villacoublay, France). The first stage of the numerical analysis consisted of solving an eigenproblem, in order to determine the mode of the loss of structural stability and to calculate the bifurcation loads for structures under axial and eccentric compression. The second stage of the numerical analysis involved examining the non-linear state of pre-deflected structures. Numerical postbuckling equilibrium paths were used to estimate the critical loads with an approximation method. The experimental results were used to validate the numerical models. This made it possible to determine the effect of compressive load eccentricity on the buckling mode and critical load of the tested structures. The results confirmed that compressive load eccentricity had a significant impact on the load-carrying capacity in the postbuckling range. This may potentially lead to premature damage to composite materials and, ultimately, to a reduced load-carrying capacity of structures.

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Section: Methodology Of the Studymentioning

confidence: 99%

Section: Object Of the Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sensitivity of Compressed Composite Channel Columns to Eccentric Loading

2022

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“…The author and others, in their previous works, investigated the stability of composite profiles with different kinds of cross-sections, as well with Z-cross-section, which were subjected under compressive load [ 21 ]. Physical models of composite columns were made from CFRP (Carbon Fibre Reinforced Polymer) from unidirectional carbon–epoxy prepreg (EP137–CR527/100–35) by autoclave technique.…”

Section: Methodsmentioning

confidence: 99%

“…More examples of using FEM to solve the problems of linear and nonlinear stability of composite structures can be found in the studies of Camanho and Davila [ 16 ], Alfano and Crisfield [ 17 ], Kreja [ 18 ] and Mani [ 19 ], among others. The authors of [ 20 , 21 , 22 ] investigated experimentally the overall stability of composite members under compression loading, with three different cross-sections.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Perforated CFRP Z-Cross-Section Profiles, under Axial Compression

Falkowicz

2022

Materials

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Thin-walled elements, thanks to their good properties, are increasingly used in structural applications, especially in the aircraft and building industries. These kinds of structures are often perforated for reducing weight and to ease servicing and maintenance operations, e.g., in aircraft wing ribs. These perforations cause a redistribution of stresses in the element which may change the ultimate strength of the structure and their elastic stiffness. The buckling behaviour of structural members with perforations is significantly influenced by the size, location, shape and number of perforations. Therefore, it is necessary to investigate the influence of these kinds of cut-out parameters on thin-walled structure buckling and postbuckling behaviour. This study investigated numerically the buckling and postbuckling behaviour of thin-walled perforated composite profiles with a Z-cross-section subjected to compression load. Numerical calculations were performed using the finite element method in the ABAQUS® program. The study investigated the effect of localisation and geometric parameters of cut-outs on the buckling load, postbuckling equilibrium path and failure load. Moreover, the perforated profiles were compared with a profile without cut-outs, which were experimentally tested in previous research. Results showed that the perforated profiles with a Z-cross-section do not lose their stability in the post-critical range. What is more, a well-chosen arrangement of the holes may prevent the mechanical properties from deteriorating.

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Limit states of thin-walled composite structures with closed sections under axial compression

Rozylo

2024

Composites Part B: Engineering

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Experimental study on the effect of eccentric compressive load on the stability and load-carrying capacity of thin-walled composite profiles

Cited by 34 publications

References 37 publications

Sensitivity of Compressed Composite Channel Columns to Eccentric Loading

Sensitivity of Compressed Composite Channel Columns to Eccentric Loading

Numerical Investigations of Perforated CFRP Z-Cross-Section Profiles, under Axial Compression

Limit states of thin-walled composite structures with closed sections under axial compression

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