Rapid in situ remediation of glass fiber wind turbine blades in low temperature environment

2019 ◽  
Vol 33 (14n15) ◽  
pp. 1940022 ◽  
Author(s):  
Zixuan Chen ◽  
Tianyu Yu ◽  
Soo-Jeong Park ◽  
Jeong-Hyo Hong ◽  
Yun-Hae Kim
Keyword(s):  
Low Temperature ◽  
Wind Turbine ◽  
Glass Fiber ◽  
Ultraviolet Irradiation ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Lower Velocity ◽  
Temperature Environment ◽  
Beam Shear ◽  
Uv Resin

The objective of this study was to investigate a novel remediation methodology for GFRP manufactured wind turbine blades for improving their maintenance under different environment and loading conditions. The fundamental specimens that were fabricated using wet prepreg manufacture technic were pre-damaged then repaired by attaching external glass fiber patches. The repair patches were penetrated by epoxy or UV resin, followed by ambient, [Formula: see text] curing or ultraviolet irradiation curing, respectively. Tensile, flexure, short beam shear tests and end notch flexure (ENF) test were conducted both in room and low temperature according to ASTM standards. The UV cured resin repaired specimens revealed better properties than epoxy in low temperature. The higher external-fundamental laminate interfacial bonding strength and lower velocity of crack diffusion, as well as the initiation of thermal residual stress, resulted in better mechanical properties under low temperature environment. In addition, the outstanding performance of UV resin was thought as the high crystallinity content curing by ultraviolet irradiation and the great inherent strength of itself.

scholarly journals Simulation of Glass Fiber Reinforced Polypropylene Nanocomposites for Small Wind Turbine Blades

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 622
Author(s):  
Yasser Elhenawy ◽  
Yasser Fouad ◽  
Haykel Marouani ◽  
Mohamed Bassyouni
Keyword(s):  
Wind Turbine ◽  
Glass Fiber ◽  
Turbine Blades ◽  
Small Scale ◽  
Fiber Reinforced ◽  
Wind Turbine Blades ◽  
Element Analysis ◽  
Glass Fiber Reinforced ◽  
Horizontal Axis Wind Turbines ◽  
Multi Walled Carbon Nanotubes

This study aims to evaluate the effect of functionalized multi-walled carbon nanotubes (MWCNTs) on the performance of glass fiber (GF)-reinforced polypropylene (PP) for wind turbine blades. Support for theoretical blade movement of horizontal axis wind turbines (HAWTs), simulation, and analysis were performed with the Ansys computer package to gain insight into the durability of polypropylene-chopped E-glass for application in turbine blades under aerodynamic, gravitational, and centrifugal loads. Typically, polymer nanocomposites are used for small-scale wind turbine systems, such as for residential applications. Mechanical and physical properties of material composites including tensile and melt flow indices were determined. Surface morphology of polypropylene-chopped E-glass fiber and functionalized MWCNTs nanocomposites showed good distribution of dispersed phase. The effect of fiber loading on the mechanical properties of the PP nanocomposites was investigated in order to obtain the optimum composite composition and processing conditions for manufacturing wind turbine blades. The results show that adding MWCNTs to glass fiber-reinforced PP composites has a substantial influence on deflection reduction and adding them to chopped-polypropylene E-glass has a significant effect on reducing the bias estimated by finite element analysis.

scholarly journals Delamination at Thick Ply Drops in Carbon and Glass Fiber Laminates Under Fatigue Loading

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Daniel D. Samborsky ◽  
Timothy J. Wilson ◽  
Pancasatya Agastra ◽  
John F. Mandell
Keyword(s):  
Wind Turbine ◽  
Glass Fiber ◽  
Carbon Fibers ◽  
Glass Fibers ◽  
Turbine Blades ◽  
Fatigue Loading ◽  
Analytical Models ◽  
Stress And Strain ◽  
Wind Turbine Blades ◽  
Static Loads

Delamination at ply drops in composites with thickness tapering has been a concern in applications of carbon fibers. This study explored the resistance to delamination under fatigue loading of carbon and glass fiber prepreg laminates with the same resin system, containing various ply drop geometries, and using thicker plies typical of wind turbine blades. Applied stress and strain levels to produce significant delamination at ply drops have been determined, and the experimental results correlated through finite element and analytical models. Carbon fiber laminates with ply drops, while performing adequately under static loads, delaminated in fatigue at low maximum strain levels except for the thinnest ply drops. The lower elastic modulus of the glass fiber laminates resulted in much higher strains to produce delamination for equivalent ply drop geometries. The results indicate that ply drops for carbon fibers should be much thinner than those commonly used for glass fibers in wind turbine blades.

Sign in / Sign up

Export Citation Format

Share Document