NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Damage Detection in Composite Structures with Wavenumber Array Data ProcessingGuided ultrasonic waves (GUW) have the potential to be an efficient and cost-effective method for rapid damage detection and quantification of large structures. Attractive features include sensitivity to a variety of damage types and the capability of traveling relatively long distances. They have proven to be an efficient approach for crack detection and localization in isotropic materials. However, techniques must be pushed beyond isotropic materials in order to be valid for composite aircraft components. This paper presents our study on GUW propagation and interaction with delamination damage in composite structures using wavenumber array data processing, together with advanced wave propagation simulations. Parallel elastodynamic finite integration technique (EFIT) is used for the example simulations. Multi-dimensional Fourier transform is used to convert time-space wavefield data into frequency-wavenumber domain. Wave propagation in the wavenumber-frequency domain shows clear distinction among the guided wave modes that are present. This allows for extracting a guided wave mode through filtering and reconstruction techniques. Presence of delamination causes spectral change accordingly. Results from 3D CFRP guided wave simulations with delamination damage in flat-plate specimens are used for wave interaction with structural defect study.
Document ID
20140002896
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Tian, Zhenhua
(South Carolina Univ. Columbia, SC, United States)
Leckey, Cara
(NASA Langley Research Center Hampton, VA, United States)
Yu, Lingyu
(South Carolina Univ. Columbia, SC, United States)
Date Acquired
April 14, 2014
Publication Date
September 16, 2013
Subject Category
Composite Materials
Report/Patent Number
NF1676L-16376
Funding Number(s)
WBS: WBS 284848.02.04.07.01
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available