Determination of mechanical properties of some glass fiber reinforced plastics suitable to Wind Turbine Blade construction

Steigmann, Rozina; Savin, Adriana; Goanță, Viorel; Bârsănescu, P D; Leiţoiu, Bogdan; Iftimie, N.; Stanciu, Mariana Domnica; Curtu, Ioan

doi:10.1088/1757-899x/147/1/012140

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…Some of the examined models exhibited snap-through performance at their critical buckling loads. A deformed structure likened to be an axisymmetric buckling mode shape was reported in literature, as being very close to that derived from the classical theory [28]. Then plotting the equilibrium paths of the nodes will lead to nonlinear behavior.…”

Section: Resultssupporting

confidence: 78%

Post-Buckling Analysis of E-Glass Fiber Reinforced Thin-Walled Cylindrical Composite

Ugwu,

Ani,

Suoware

et al. 2024

MSF

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Post buckling analysis of E-glass fiber reinforced cylindrical composite under axial compression using both experimental and numerical method is presented. Using the Eigen value buckling analysis, the studies employ a mixture ratio of E-glass fiber composite of chopped strand mat. Five molds of each E-glass fiber mixture were reinforced with polyester resin to produce cylindrical shells of equal dimensions. Various cylindrical specimens’ predicted critical buckling load were tested and recorded using a compressive loading machine. Comparisons were made to ascertain the cylindrical shells buckling and post buckling behavior at certain load levels between the experimental and analytical results. A one-way Anova was used to compare the outcome of the theoretical, experimental and numerical methods of analysis and the result showed that there is no evidence to suggest difference between the three methods applied in the buckling load analysis. The post buckled shapes of the samples were obtained and recorded as bulge diamond shape of a buckled cylindrical structure. The effective mechanical properties of the chopped strand mat (CSM) reinforced composite cylinder were recorded from the experiment which has modulus of Elasticity 197.707 N/mm2, Poisson’s ratio of 0.22 and density of 1250 Kg/m3.

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Section: Resultssupporting

confidence: 78%

Post-Buckling Analysis of E-Glass Fiber Reinforced Thin-Walled Cylindrical Composite

Ugwu,

Ani,

Suoware

et al. 2024

MSF

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“…Figure 17 , Figure 18 , Figure 19 and Figure 20 show the variation of the maximum normal main stress σ max , minimum normal main stress σ min , and maximum shear stress τ max , as reported to the angle of the rotation of the torque end for all eight cases, respectively, for the four transducers placed in the two methods of loading. Young’s modulus and Poisson’s coefficient were determined on the basis of the tensile tests performed in previous steps [ 32 ]. The values of these characteristics were: E = 36,233 MPa, respectively, ν = 0.161.…”

Section: Resultsmentioning

confidence: 99%

Structural Testing by Torsion of Scalable Wind Turbine Blades

et al. 2022

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In life service, the wind turbine blades are subjected to compound loading: torsion, bending, and traction, all these resulting in the occurrence of normal and tangential stresses. At some points, the equivalent stresses, due to overlapping effects provided by normal and shear stresses, can have high values, close to those for which the structure can reach to the failure point. If the effects of erosion and clashes with foreign bodies are added, the structure of the blade may lose its integrity. Considering both the complex shape of the blade and internal structure used, the mechanical behavior of the blade, such as the rigidity and resistance along the length of the blade, are usually determined with some uncertainty. This paper presents the results obtained in the non-destructive tests at static torsion of a scalable wind turbine blade. The objective of the paper was to determine the variation of the equivalent stress in the most stressed points of the blade, in relation to the torques applied. To determine the points with the highest stress, a finite element analysis was performed on the scalable wind turbine blade. Electrotensiometric transducers were mounted at different points of the blade, determining the main stresses in the respective points, as well as their variation during the torsion test, by subsequent calculations. The determinations were performed by applying the torque in both senses, in relation to the blade axis, thus concluding the values of the equivalent stress in the two cases.

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“…The most widely used material for blade manufacturing is GFRP, due to its mechanical and elastic characteristics and environmental resistance, as well as its lower price compared to other materials [ 5 , 6 , 7 ].…”

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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Determination of mechanical properties of some glass fiber reinforced plastics suitable to Wind Turbine Blade construction

Cited by 11 publications

References 7 publications

Post-Buckling Analysis of E-Glass Fiber Reinforced Thin-Walled Cylindrical Composite

Post-Buckling Analysis of E-Glass Fiber Reinforced Thin-Walled Cylindrical Composite

Structural Testing by Torsion of Scalable Wind Turbine Blades

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

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