Failure Mechanisms of GFRP Scarf Joints under Tensile Load

Ghafafian, Carineh; Popiela, Bartosz; Trappe, Volker

doi:10.3390/ma14071806

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…The patch was fabricated by placing the largest ply as a first taper layup sequence according to the large-to-small layup method which is often taken in practice as a compromise of practicality and restoration of mechanical properties, especially in the general aviation industry. 33 In this sequence, the first layer of reinforcing fabric covers the repair area, followed by successively smaller layers, and is finished with an extra outer layer (Figure 4(d)). 34 The plain weave repair plies have half the dry areal weight of the facesheet twill-weave plies and are 0.5 mm thinner.…”

Section: Repair Processmentioning

confidence: 99%

Experimental investigation of an alternative approach to temporarily repair Nomex honeycomb sandwich structures in aerospace applications

Djemaoune

Krstic

Rasic

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this study, the effectiveness of an alternative approach to temporarily repair an open-hole damaged Nomex honeycomb sandwich structure is experimentally investigated. The repair process consists of a resin-infused carbon fabric wet layup patch adhesively bonded to the facesheets and Airex structural foam used as a core replacement plug. The specimens of intact, damaged and repaired Nomex honeycomb sandwich panels are subjected to the quasi-static three-point bending test. The panel's flexural performances are determined by analyzing the obtained load-displacement responses. The effectiveness of the proposed repair technique is evaluated by comparing the responses of the repaired panels with the ones obtained from the intact and damaged panel specimens. The comparison is effectuated in terms of mean values of flexural elastic modulus, peak force, energy absorption, and specific energy absorption. In addition, the observed failure modes of the different panel configurations are pointed out and discussed.

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Section: Repair Processmentioning

confidence: 99%

Experimental investigation of an alternative approach to temporarily repair Nomex honeycomb sandwich structures in aerospace applications

Djemaoune

Krstic

Rasic

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Although attempts are made to transfer the stress to the interior structure, the GFRP composite material is also heavily stressed. Problems arise when dynamic loading changes the direction of the principal stresses, which are no longer directed along the reinforcement fibers [ 12 ]. Therefore, the orientation of the reinforcement fibers is of particular importance both for the realization of the strength conditions of the blades and for the economic aspects of material economy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Fiber Orientation on Mechanical and Elastic Characteristics at Axial Stresses of GFRP Used in Wind Turbine Blades

et al. 2023

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Due to its physical and mechanical properties, glass-fiber-reinforced polymer (GFRP) is utilized in wind turbine blades. The loads given to the blades of wind turbines, particularly those operating offshore, are relatively significant. In addition to the typical static stresses, there are also large dynamic stresses, which are mostly induced by wind-direction changes. When the maximum stresses resulting from fatigue loading change direction, the reinforcing directions of the material used to manufacture the wind turbine blades must also be considered. In this study, sandwich-reinforced GFRP materials were subjected to tensile testing in three directions. The parameters of the stress–strain curve were identified and identified based on the three orientations in which samples were cut from the original plate. Strain gauge sensors were utilized to establish the three-dimensional elasticity of a material. After a fracture was created by tensile stress, SEM images were taken to highlight the fracture’s characteristics. Using finite element analyses, the stress–strain directions were determined. In accordance to the three orientations and the various reinforcements used, it was established that the wind turbine blades are operational.

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“…It can be concluded that the linear transversely isotropic model is adequately accepted as the estimation method of the GFRP composite structure response. journal.ump.edu.my/ijame ◄ researchers and naval architects to investigate the mechanical behavior of composite due to specific loading conditions [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Unidirectional GFRP Composite Mechanical Response Subjected to Tension Load using Finite Element Method

Zakki

Hadi²,

Windyandari³

et al. 2022

Int. J. Automot. Mech. Eng.

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Composite material is a well-known structural material which is increasingly adopted as an engineering structure material. Glass fiber reinforced polymer offers the lightweight and high strength characteristics that is required for the modern industry, such as aviation, automotive, wind power, and marine technology. One of the important mechanical characteristics of the composite materials are the tensile properties, because it is well known as the material strength. Therefore, the investigation of mechanical response on the glass fiber reinforced polymer (GFRP) tensile test using numerical analysis is important for the estimation of structural response of the GFRP complex structure, such as boat construction. The objective of this research is to assess and estimate the mechanical response of the GFRP composite material subjected to tension load using finite element method. The linear transversely isotropic model is developed to estimate the unidirectional glass fiber GFRP with the configuration of fiber orientation angles of 0°, 30°, 45°, 60° and 90°. The results show that FE simulation are capable to detect the specimen response during the tensile test. The maximum discrepancy of the estimated stress strain diagram is about 16.5% to 32% compared to experimental data. The larger orientation angle has shown the larger discrepancy value. It is found that the increment of discrepancy value is generated by the nonlinearity behavior of the material due to the domination of polymer material behavior on the large orientation angle. Otherwise, the FE models have estimated accurately the ultimate strength, maximum displacement and fracture load. It can be concluded that the linear transversely isotropic model is adequately accepted as the estimation method of the GFRP composite structure response.

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Failure Mechanisms of GFRP Scarf Joints under Tensile Load

Cited by 9 publications

References 25 publications

Experimental investigation of an alternative approach to temporarily repair Nomex honeycomb sandwich structures in aerospace applications

Experimental investigation of an alternative approach to temporarily repair Nomex honeycomb sandwich structures in aerospace applications

Analysis of the Effect of Fiber Orientation on Mechanical and Elastic Characteristics at Axial Stresses of GFRP Used in Wind Turbine Blades

Numerical Analysis of Unidirectional GFRP Composite Mechanical Response Subjected to Tension Load using Finite Element Method

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