Campus Units

Aerospace Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Conference Proceeding

Conference

45th Annual Review of Progress in Quantitative Nondestructive Evaluation

Publication Version

Published Version

Publication Date

5-8-2019

Journal or Book Title

AIP Conference Proceedings

Volume

2102

Issue

1

First Page

100003

DOI

10.1063/1.5099831

Conference Title

45th Annual Review of Progress in Quantitative Nondestructive Evaluation

Conference Date

July 15-19, 2018

City

Burlington, VT

Abstract

This paper will present a review of the use of Air coupled ultrasonics for nondestructive evaluation of wind turbine blades carried out at the CNDE, Iowa State University. Results will show the use of air coupled ultrasonics to scan thick composite sections of 40m wind turbine blades including the spar cap, the leading and trailing edges. Detection of defects such as slots, holes, fiber waviness (both in-plane and out-of-plane waviness), delaminations and dry fibers will be presented. Other features like adhesive thickness and length estimation in spar cap/shear web section and the trailing edge section will also be presented. The use of air coupled UT is not limited to just detection, but also characterization of the detected defects. Results highlighting the use of ultrasonic velocity to characterize defects will be presented. This includes defining damage index in terms of velocity, as well as development of stiffness maps to show reduction in structural stiffness based on the defect. Additionally, the challenges of NDT of wind turbine blades using conventional ultrasonics will also be presented.

Comments

This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This proceeding appeared in Chakrapani, Sunil Kishore, Daniel J. Barnard, and Vinay Dayal. "Review of ultrasonic testing for NDE of composite wind turbine blades." AIP Conference Proceedings 2102, no. 1 (2019): 100003, and may be found at DOI: 10.1063/1.5099831. Posted with permission.

Copyright Owner

The Authors

Language

en

File Format

application/pdf

Available for download on Friday, May 08, 2020

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