Wind turbine blade trailing edge failure assessment with sub-component test on static and fatigue load conditions

Lahuerta, F.; Koorn, N.; Smissaert, D.

doi:10.1016/j.compstruct.2018.07.112

Cited by 38 publications

(24 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is the first-of-its-kind study particularly focusing on the failure of trailing edge sections to the best of our knowledge. In addition, the FE model presented in this study is more detailed and accurate in predicting the failure sequence and multiple failure modes of trailing edge sections comparing to existing studies [9,11].…”

Section: Introductionmentioning

confidence: 86%

“…Regarding the subcomponents of trailing edges, efforts have been made to elaborate benefits of subcomponent over full-scale testing [8] and comparing different subcomponent test concepts [9]. Recent work [11] has assessed the failure of trailing edge subcomponents by addressing structural instability associated with pre-buckling and post-buckling response.…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned studies [8][9][10][11] provide valuable knowledge on the structural response of trailing edge sections in the subcomponent tests. Nevertheless, two important questions remain.…”

Section: Introductionmentioning

confidence: 99%

“…Several layers of solid elements are used along the thickness direction of the trailing edge panels to better capture through-thickness stress/strain components in both sandwich skin laminates and foam core materials. The presented solid element model is much more detailed than the shell element models that have been used in other studies [1,3,5,9,11].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis

Xiao

Berring

Madsen

et al. 2019

Composite Structures

View full text Add to dashboard Cite

S. (2019). Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis. Composite Structures, 214, 422-438. https://doi.Please cite this article as: Chen, X., Berring, P., Madsen, S.H., Branner, K., Semenov, S., Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis, Composite Structures (2019), doi: https://doi. Abstract:This paper presents a comprehensive study on structural failure of a trailing edge section cut from a composite wind turbine blade. The focus is placed on understanding progressive failure behavior of the trailing edge section in subcomponent testing during its entire failure sequence. Digital Image Correlation (DIC) is used to capture buckling deformation and strain distributions of the specimen. Detailed post-test inspection is performed to identify failure modes and failure characteristics. A nonlinear Finite Element (FE) model that accounts for all observed failure modes is developed based on continuum damage mechanics and progressive failure analysis techniques. Multiple structural nonlinearities originate from buckling, and contact and material failures are included in the model to predict the failure process. The study shows that in addition to the buckling-driven failure phenomenon, the surface contact of sandwich panels contributes to the failure process of the trailing edge section. Foam materials start to fail before the ultimate load-carrying capacity of the specimen is reached, while both composite materials and adhesive materials fail in the post-peak regime.The matrix-dominant failure and delamination develop before the fiber-dominant failure in composite laminates. The proposed FE model captures the progressive failure process of the trailing edge section reasonably well.

show abstract

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis

Xiao

Berring

Madsen

et al. 2019

Composite Structures

View full text Add to dashboard Cite

show abstract

“…Of course, some researchers tested only the local part of the blade to study the damage of the trailing edge because of the high cost of full-scale blade testing. In 2018, Lahuerta [24] carried out static and fatigue tests on the blade submodel to analyze the failure and damage mechanism of the blade trailing edge. Also, the test results were compared with the simulation results to modify the simulation analysis method.…”

Section: Introductionmentioning

confidence: 99%

Influence of Structural Configurations on the Shear Fatigue Damage of the Blade Trailing-Edge Adhesive Joint

Chen

Wang

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

Wind turbines are under continuous development for large-scale deployment and oceanization, leading to the requirement of longer blades. The economic losses caused by blade replacement and shutdown have increased. The downtime caused by blade issues in a wind turbine is 8-20% of the total downtime. Many of these blade issues originate from the cracking of the blade trailing edge. The edge is more susceptible to damage due to the complex geometry, manufacturing technique, and operation conditions. The traditional design method and the expensive experimental research are not suitable for the accurate damage analysis of the trailing-edge adhesive because of simplifying assumptions and costs. This study aimed to investigate the influence of trailing-edge structural configurations on the shear fatigue life of the trailing-edge adhesive joint using finite element and stress transformation matrix (STM) methods. The structural configurations of the blade trailing edge included the position of unidirectional fiber layer (UD), chamfer of bonding line, prefabricated components, and outer over-lamination of the trailing edge. In this study, the finite element method was used to simulate the blade structure. The shell element was used for laminates, and the solid element was used for the trailing-edge adhesive joint. The basic shear fatigue properties of the adhesive were obtained by standard component tests. The shear fatigue life of the blade trailing-edge adhesive joint under given load conditions was calculated using the fatigue properties of the adhesive and STM method. The results showed that the angle of chamfering, location of UD, rigidity of the preform, and outer over-lamination all had an obvious influence on the fatigue damage of trailing-edge adhesive. The findings of this study can be used to guide blade structure design and blade production and maintenance.

show abstract

Computational Fluid‐Structure Interaction towards Simulating Large Wind Turbines with openFOAM and deal.II Coupled via preCICE

Mang

Ahrens

Seume

et al. 2023

Proc Appl Math and Mech

View full text Add to dashboard Cite

Wind energy is an essential part of the Green Deal. The trend to increase the size of wind turbines, especially offshore, introduces additional dynamic effects at the long and flexible blades. Embedded in the CRC 1463, DFG, we are working on the fluid-structure interaction to avoid dynamic stall and investigate flutter effects and blade breathing of ultra-slim blades [1,2]. This requires an accurate numerical setup that reliably captures the fluid-structure interactions due to the highly turbulent flow and large deformations of the blades. In preliminary work, the Unsteady Reynolds-averaged Navier-Stokes method (URANS) in openFOAM [3] was used to simulate the flow around rotating helicopter blades with a changing angle of attack.[4] successfully predicted the distinct dynamic stall hysteresis with moderate computational effort and captured extreme values (load peaks) within the experimental uncertainties. This aerodynamic solver is to be coupled with a structural solution, for which deal. II [5] provides the linear elastic blade model. The fluid and the structure solvers are coupled via the software preCICE [6] and solved with a staggered approach. Numerical results are presented for a simplified 2D cross-section of a rectangular solid of carbon-fiber-reinforced polymers and a steady inflow velocity. Key challenges for the coupling of the solvers are discussed and the future work is outlined.

show abstract

Wind turbine blade trailing edge failure assessment with sub-component test on static and fatigue load conditions

Cited by 38 publications

References 13 publications

Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis

Understanding progressive failure mechanisms of a wind turbine blade trailing edge section through subcomponent tests and nonlinear FE analysis

Influence of Structural Configurations on the Shear Fatigue Damage of the Blade Trailing-Edge Adhesive Joint

Computational Fluid‐Structure Interaction towards Simulating Large Wind Turbines with openFOAM and deal.II Coupled via preCICE

Contact Info

Product

Resources

About