NDLI: Non-Destructive Analysis of Wind Turbine Blade Structural Integrity

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Puri, Amit Mcgugan, Malcolm Find, M. Jensen
Copyright Year	2009
Abstract	The hollow profile of a wind turbine blade is subject to high levels of deformation when under the crushing pressure that is induced by flapwise loading. The load bearing box girder will ovalize under the pressure like forces and the shear sandwich webs and monolithic composite flanges are critical components whose failure may cause overall blade failure. This paper addresses the underlying causes of failure for these two parts by performing individual representative mechanical testing on them, and using digital image correlation (DIC) and acoustic emissions (AE) monitoring. Results show that the strength of the flange is primarily determined by the tensile strength of a relatively thin biaxial layer in this complex design. The buckling tests performed on sandwich material show that DIC is useful in determining the causes of failure, whilst AE monitoring has potential for in-situ monitoring of these structures, and is able to provide important data about the damage inside a blade.
Sponsorship	Pressure Vessels and Piping
Starting Page	417
Ending Page	426
Page Count	10
File Format	PDF
ISBN	9780791843680
DOI	10.1115/PVP2009-77501
e-ISBN	9780791838549
Volume Number	Volume 5: High Pressure Technology; Nondestructive Evaluation Division; Student Paper Competition
Conference Proceedings	ASME 2009 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2009-07-26
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Deformation Blades Bearings Flanges Pressure Girders Stress Tensile strength Design Composite materials Mechanical testing Wind turbines Damage Shear (mechanics) Buckling Failure Acoustic emissions
Content Type	Text
Resource Type	Article

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