Scaled Composite I-Beams for Subcomponent Testing of Wind Turbine Blades: An Experimental Study

Asl, Mohamad Eydani; Niezrecki, Christopher; Sherwood, James A.; Avitabile, Peter

doi:10.1007/978-3-319-63408-1_7

Cited by 4 publications

(6 citation statements)

References 15 publications

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“…Static tests on composite beams were performed by Asl et al [90][91][92][93]. In this work, the authors investigate composite I-beams analytically, numerically, and experimentally in the framework of model analysis for subcomponent testing; the beams are equivalent to the spar caps and shear webs of wind turbine blades.…”

Section: Static Analysismentioning

confidence: 99%

“…Aiming for a good prediction of prototype behavior using only partial similitudes, Asl et al [90][91][92][93] introduce a permutation algorithm that searches for the potential model having ply schemes with overall laminate thickness less than that of the prototype; an error is defined to find the layup that works best with the derived scaling laws, and this lay-up is then used for predictions. Their algorithm is known as the distorted lay-up technique (DLT) and the tests prove that it is possible to have satisfactory results with errors smaller than 6% also with such distorted models.…”

Section: Static Analysismentioning

confidence: 99%

“…In a recent work [93], DLT was used to test experimentally a prototype and nine models (three small, three medium, and three large) with different lay-ups in a four-point bending test. The results show that the strain field of the small beams is representative of those of the medium and large models; the prescribed loads described by similitude analysis work accurately across different scales.…”

Section: Static Analysismentioning

confidence: 99%

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A Review of Similitude Methods for Structural Engineering

Casaburo

Petrone

Franco

et al. 2019

Applied Mechanics Reviews

126

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Similitude theory allows engineers, through a set of tools known as similitude methods, to establish the necessary conditions to design a scaled (up or down) model of a full-scale prototype structure. In recent years, to overcome the obstacles associated with full-scale testing, such as cost and setup, research on similitude methods has grown and their application has expanded into many branches of engineering. The aim of this paper is to provide as comprehensive a review as possible about similitude methods applied to structural engineering and their limitations due to size effects, rate sensitivity phenomena, etc. After a brief historical introduction and a more in-depth analysis of the main methods, the paper focuses on similitude applications classified, first, by test article, then by engineering fields.

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Section: Static Analysismentioning

confidence: 99%

Section: Static Analysismentioning

confidence: 99%

Section: Static Analysismentioning

confidence: 99%

See 1 more Smart Citation

A Review of Similitude Methods for Structural Engineering

Casaburo

Petrone

Franco

et al. 2019

Applied Mechanics Reviews

126

View full text Add to dashboard Cite

show abstract

“…The simulation results were compared with the experimental observations obtained from Digital Image Correlation Technique (DICT) and conventional techniques (Linear Variable Differential Transformers-LVDT and strain gauges). Asl et al [94] designed and developed laminated composite I-beam reduced-scale models in three different sizes from the spar caps and the shear web geometry of a utility-scale wind turbine blade. The composite I-beams were tested in a quasi-static four-point bending configuration and strain fields of the three beams were compared and similarity of the strain distribution in the three scales was demonstrated.…”

Section: Experimental Approach To Blade Design and Analysismentioning

confidence: 99%

Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review

et al. 2018

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Among renewable sources of energy, wind is the most widely used resource due to its commercial acceptance, low cost and ease of operation and maintenance, relatively much less time for its realization from concept till operation, creation of new jobs, and least adverse effect on the environment. The fast technological development in the wind industry and availability of multi megawatt sized horizontal axis wind turbines has further led the promotion of wind power utilization globally. It is a well-known fact that the wind speed increases with height and hence the energy output. However, one cannot go above a certain height due to structural and other issues. Hence other attempts need to be made to increase the efficiency of the wind turbines, maintaining the hub heights to acceptable and controllable limits. The efficiency of the wind turbines or the energy output can be increased by reducing the cut-in-speed and/or the rated-speed by modifying and redesigning the blades. The problem is tackled by identifying the optimization parameters such as annual energy yield, power coefficient, energy cost, blade mass, and blade design constraints such as physical, geometric, and aerodynamic. The present paper provides an overview of the commonly used models, techniques, tools and experimental approaches applied to increase the efficiency of the wind turbines. In the present review work, particular emphasis is made on approaches used to design wind turbine blades both experimental and numerical, methodologies used to study the performance of wind turbines both experimentally and analytically, active and passive techniques used to enhance the power output from wind turbines, reduction in cut-in-speed for improved wind turbine performance, and lastly the research and development work related to new and efficient materials for the wind turbines.

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“…More recently, Asl et al [11][12][13] dedicated their work to design composite I-beams and applied structural similitude theory [14] to generate representative down-scaled models of the load carrying part of wind turbine blades. Quasi-static four-point bending was used to experimentally validate this approach on laminated beams with different layups and length scales.…”

Section: Introductionmentioning

confidence: 99%

An Improved Sub-component Fatigue Testing Method for Material Characterization

2018

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Scaled Composite I-Beams for Subcomponent Testing of Wind Turbine Blades: An Experimental Study

Cited by 4 publications

References 15 publications

A Review of Similitude Methods for Structural Engineering

A Review of Similitude Methods for Structural Engineering

Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review

An Improved Sub-component Fatigue Testing Method for Material Characterization

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