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Induction-based Thermographic Inspection of Composites

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
62673
Program Year/Program:
2003 / STTR
Agency Tracking Number:
F033-0264
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Thermal Wave Imaging, Inc.
845 Livernois Street Ferndale, MI 48220-
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2003
Title: Induction-based Thermographic Inspection of Composites
Agency / Branch: DOD / USAF
Contract: F49620-04-C-0009
Award Amount: $99,985.00
 

Abstract:

Rapid growth in the performance and capabilities of thermography, and the increased use of composite materials in the construction and repair of military and commercial aircraft, has strongly positioned it as a viable NDI technique. In Phase I, ThermalWave Imaging, Inc. and UD-CCM propose to develop an AC coupled, non-contact Non-Destructive Evaluation (NDE) technique that can evaluate 3-D state of carbon fiber composite structures using their inherent electrical resistance characteristics. Thetechnique relies on low-power induction heating to generate small levels of local 3-D volumetric heating and subsequent thermal image evaluation for defect and damage detection. The 3-D heat generation profile is a function of the inherent carbonfiber-based electrical resistance network in the composite and any changes in the network due to damage or defects will affect heat generation capability (pattern and temperature). In addition, the presence of damage or defects will cause localizedmagnetic flux concentrations (same concept as eddy current sensors) resulting in localized heating at the defect, making them easily detectable. The proposed technique has many advantages including the elimination of interconnects and embedded sensors,scanning of large surface areas rapidly, usability with current in-service structures and the use of industry standard induction and IR detection hardware. Successful development and implementation of the proposed induction heating based thermographysystem, for detecting and quantifying size and depth of damage in composite components, will fill a wide-spread void in current capability for both commercial and military aerospace industry segments. Conventional NDI techniques such as UT, and X-ray haveshown limited success for this particular need, not to mention long inspection times, high cost of operation, health and safety issues, and inadequate portability.Our Phase I proposal was formulated based on input from current and prospective customers in Government and private aerospace manufacturing, service, and R&D, including Air Force, Navy, NASA, commercial airline, and military NDE personnel. We found thatseveral major aerospace and power generation customers (Boeing, Airbus, GKN Westland, Lockheed-Martin, Siemens Westinghouse, GE) were still using conventional inspection techniques such as UT, and X-ray for detection of sub-surface defects with moderatesuccess, not to mention long inspection times, high cost of operation, health and safety issues, and inadequate portability. These customers indicated a high degree of interest in an NDI system that would incorporate the advanced features of the pulsedsystems that they were using on other applications.

Principal Investigator:

Steven M. Shepard
President
2484143730
sshepard@thermalwave.com

Business Contact:

Rebecca Simpson
Administrator
2484143730
bsimpson@thermalwave.com
Small Business Information at Submission:

Thermal Wave Imaging, Inc.
845 Livernois Street Ferndale, MI 48220

EIN/Tax ID: 383076506
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
UNIV. OF DELAWARE
OVPR, 210 Hullihen Hall
Newark, NJ 19716
Contact: Regan Walsh
Contact Phone: (302) 831-8001
RI Type: Nonprofit college or university