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Vibration Based Structural Health Monitoring using Time Reversal Acoustics

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
67943
Program Year/Program:
2004 / STTR
Agency Tracking Number:
F045-016-0181
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
ARTANN LABORATORIES, INC.
1459 LOWER FERRY RD TRENTON, NJ -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2004
Title: Vibration Based Structural Health Monitoring using Time Reversal Acoustics
Agency / Branch: DOD / USAF
Contract: FA9550-04-C-0068
Award Amount: $98,546.00
 

Abstract:

Vibration based structural health monitoring using Time Reversal Acoustics (TRA)represents a new approach to in-situ nondestructive evaluation of airspace structures. The proposed noncontact technique is based on TRA focusing of high frequency vibrations in tested structures produced by single or several external sources and surface vibration measurements by a scanning laser vibrometer. The application of TRA principles will significantly improve the vibration based NDE system's ability to detect the presence of structural faults and localize damage due to targeted focusing of the acousto-elastic waves. In contrast to conventional acoustic methods of NDE where the dispersion of elastic waves is viewed as an unfavorable phenomena, the TRA methodology takes advantage of this previously undesirable process. Scanning of the TRA focused signal over examined surface provides information necessary for tomographic mapping of damage and degradation. During Phase I, the principles of the TRA system with external sources and a laser vibrometer for damage detection will be developed and feasibility tests will be conducted on composite and metal parts with increasing level of damage including cracks, delamination, fiber breakage, corrosion, and battle damage. The developed TRA software and hardware will form a basis for the prototype that will be built in Phase II.

Principal Investigator:

Charles R. Farrar
Structural Diagnostics Team Leader
5056635330
farrar@lanl.gov

Business Contact:

Souren Airapetian
Vice President
6098830100
suren@artannlabs.com
Small Business Information at Submission:

ARTANN LABORATORIES, INC.
1457 Lower Ferry Road Trenton, NJ 08618

EIN/Tax ID: 223503679
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Los Alamos National Laboratory
Weapon Response Group (ESA-WR), PO Box 1663, MS T006
Los Alamos, NM 87545
Contact: Charles R. Farrar
Contact Phone: (505) 663-5330
RI Type: Federally funded R&D center (FFRDC)