Experimental investigation of failure process in compressed channel-section GFRP laminate columns assisted with the acoustic emission method

Kubiak, Tomasz; Samborski, Sylwester; Teter, Andrzej

doi:10.1016/j.compstruct.2015.08.023

Cited by 67 publications

(35 citation statements)

References 24 publications

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“…By measuring the strain, it was possible to determine the values of critical load using the Koiter's approximation method [33,34]. At the same time, measurements of parameters resulting from the acoustic emission (AE) method were performed [35]. The AE equipment was Vallen's 2-channel AMSY-5 set (Vallen Systeme GmbH, Icking, Germany) with piezoelectric sensors Fujicera 1045S and the AEP-4 preamplifiers.…”

Section: Methodsmentioning

confidence: 99%

“…Damage of the composite material is usually presented in the literature as a complex, multi-stage process. The composite material is usually closely related to damage of the matrix of the composite material, the cracking or buckling of the fibers and the occurrence of interlayer delamination due to shear stress [35,36]. The level of damage to the composite was determined using progressive damage analysis, which was described by Lapczyk and Hurtado [28].…”

Section: Damage Initiationmentioning

confidence: 99%

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Progressive Failure Analysis of Thin-Walled Composite Structures Verified Experimentally

et al. 2020

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The subject of the presented research was a thin-walled composite column made of CFRP (carbon-epoxy laminate). The test sample had a top-hat cross-section with a symmetrical arrangement of laminate layers [90/−45/45/0]s. The composite structure was subjected to the process of axial compression. Experimental and numerical tests for the loss of stability and load-carrying capacity of the composite construction were carried out. The numerical buckling analysis was carried out based on the minimum potential energy criterion (based on the solution of an eigenvalue problem). The study of loss of load-carrying capacity was performed on the basis of a progressive failure analysis, solving the problem of non-linear stability based on Newton-Raphson’s incremental iterative method. Numerical results of critical and post-critical state were confronted with experimental research in order to estimate the vulnerable areas of the structure, showing areas prone to damage of the material.

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Section: Methodsmentioning

confidence: 99%

Section: Damage Initiationmentioning

confidence: 99%

Progressive Failure Analysis of Thin-Walled Composite Structures Verified Experimentally

et al. 2020

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“…The studies presented in the abovementioned works are described using the example of thin-walled structures made of glass fiber-reinforced plastic and fiber metal laminate materials. An important stage of the loss of load-carrying capacity analysis is the analysis of the stability of the structure in the context of the use of acoustic emission [10]. The issues raised in this paper reflect the current area of interest of modern materials designers and researchers well.…”

Section: Introductionmentioning

confidence: 97%

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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“…Within this study, the structure damage was conducted based on the following methods: in the case of experimental testing: deformation measurements and signals from the acoustic emission method, in the case of numerical calculations using the progressive failure analysis [10,12,13]. Due to the axial load applied to the structure, the issue of the initiation and evolution of the damage of the composite material was discussed [10][11][12][13][14][15][16][17][18][19]. In this case, the applied damage model describes the damage initiation in selected components of the composite material (damage to the fibres and matrix as a result of compression and tension) based on the Hashin criterion [20,21].…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis of Thin-Walled Composite Profile Subjected to Axial Compression

Różyło¹

2019

Adv. Sci. Technol. Res. J.

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The paper describes a numerical and experimental study investigating the load carrying capacity of thin-walled composite structure subjected to axial compression. Composite profile was made of carbon-epoxy laminate with symmetrical arrangement of the layers [90/-45/45/0]s. The experiment was performed on a universal testing machine (Zwick Z100) until total failure of the column. In case of experimental study, post-critical equilibrium paths in full range of loads of the structure were determined. The numerical analysis was performed by the finite element method using the Abaqus® software. Numerical analysis involved solving a nonlinear stability problem. The geometrically non-linear problem was solved by the Newton-Raphson method. The load carrying capacity of the composite structure was determined by the progressive failure analysis, which firstly estimates damage initiation load (Hashin criterion) and secondly estimates failure load (energy criterion). The numerical and experimental results show high agreement, which confirms the adequacy of the prepared numerical model of composite profile.

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Experimental investigation of failure process in compressed channel-section GFRP laminate columns assisted with the acoustic emission method

Cited by 67 publications

References 24 publications

Progressive Failure Analysis of Thin-Walled Composite Structures Verified Experimentally

Progressive Failure Analysis of Thin-Walled Composite Structures Verified Experimentally

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

Failure Analysis of Thin-Walled Composite Profile Subjected to Axial Compression

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