Fatigue crack detection using built-in Sensor Cluster Network

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911W6-05-C-0005
Agency Tracking Number: A032-2445
Amount: $1,670,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: A03-071
Solicitation Number: 2003.2
Small Business Information
155C-3 Moffett Park Drive, Sunnyvale, CA, 94089
DUNS: 043688410
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Shawn Beard
 Director of Systems Integ
 (408) 745-1188
Business Contact
 Amrita Kumar
Title: Director Projects & Techn
Phone: (408) 745-1188
Email: akumar@acellent.com
Research Institution
Acellent Technologies proposes to develop an innovative one-of-a-kind sensor cluster based structural health monitoring system that combines Acellent's current single-element SMART Layer actuator/sensor network together with multi-element phased arrays to produce a Sensor Cluster Network. The proposed system is being developed to (a) Quantitatively assess structural damage such as cracks due to fatigue, (b) Identify damage in inaccessible areas of rotorcraft structures, (c) Characterize damage growth, and (d) Provide an image of the damage size and orientation. The basis for the development is Acellent's SMART Layer technology that utilizes a network of distributed transducers that are integrated with the structure itself and serve as sources for acousto-ultrasonic structural data. Phase I was focussed on establishing the feasibility of development of a geometrically optimized sensor network and preliminary sensor cluster diagnostic software. The results have demonstrated that the developed technology can identify corner cracks in thick metal structures and energy changes in the diagnostic signals can be related to crack size. These results will be used in phase II to quantify fatigue cracks in metal structures and to determine the probability of detection of these cracks in the structures.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government