Optical Sensor for Detection of Fatigue Damage Precursors

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NND04AA03C
Agency Tracking Number: 022412
Amount: $599,994.00
Phase: Phase II
Program: SBIR
Awards Year: 2004
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
MetroLaser, Inc.
2572 White Road, Irvine, CA, 92614
DUNS: 188465819
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Christina Arnold
 Principal Investigator
 (949) 553-0688
 carnold@metrolaserinc.com
Business Contact
 Christina Arnold
Title: Contracts Manager
Phone: (949) 553-0688
Email: carnold@metrolaserinc.com
Research Institution
N/A
Abstract
Investigation into fatigue damage precursors over the last decade has demonstrated that surface-evident defects such as cracks and slipbands evolve in a regular manner, which corresponds to the development of fatigue damage. Through examination of the evolution of such damage precursors in a component, this regularity can facilitate prediction of the component?s remaining fatigue life. The proposed Phase 2 work is to develop and characterize a sensor for in-situ examination and historical tracking of the precursor defects and to construct the analytical framework for using that data to predict the onset of catastrophic failure. Since a major application of this technology is for monitoring fatigue damage in aircraft components, the proposed system will be compact, durable, and relatively inexpensive. The Phase I results have confirmed models of precursor evolution on surfaces; and testing of several prototype surface inspection devices has shown that the technology is compatible with the restrictions on light sources, beam scanners, detection systems, and communication interfaces which this application demands. Design analysis and preliminary designs have also been completed for the in-situ sensor modules as well as their supporting communications and control systems, so that this technology is now ready to enter Phase II development.

* information listed above is at the time of submission.

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