In Situ Evaluation of 3-D Woven Composite Structural Performance Using Fiber Optic Sensors

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F49620-03-C-0006
Agency Tracking Number: F003-0440
Amount: $250,000.00
Phase: Phase II
Program: STTR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
109 MacKenan Drive, Cary, NC, 27511
DUNS: 030936335
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Alexander Bogdanovich
 Vice President Res., Dev. & Eng.
 (919) 481-2500
Business Contact
 R.Bradley Lienhart
Title: President & CEO
Phone: (919) 481-2500
Research Institution
 University of Dayton Research Institute
 Thomas J Whitney
 Aerospace Mechanics Division, 300 College Park
Dayton, OH, 45469
 (937) 229-3010
 Nonprofit college or university
"Three-dimensional textile reinforcement architectures with straight in-plane fibers and optimized through thickness fiber content are considered as efficient solutions for the next generation of light weight, damage tolerant, high strength compositesallowing for cost-effective manufacturing solutions. The 3-D weaving process is gentle to the fibers, thus making automated fiber optic sensor insertion feasible. 3-D woven preforms do not allow delamination, thus providing a safe environment for embeddedfiber opric sensors. Principal objectives of the project are (i) develop commercial, automated placement of fiber optic sensors into 3-D woven fabric preforms; (ii) develop resin infusion techniques suitable for processing composite structures withembedded optical sensors; (iii) demonstrate the functionality of embedded sensors in the 3-D woven composite panels with open holes and composite bolted joints, and (iv) validate some of the advanced 3-D stress/strain and failure analysis tools bycomparison with embedded fiber optic sensor data. The effort will include specific modification of current 3-D weaving processes, development of suitable and reliable sensor connectors, manufacturing of open hole and bolted joint composite specimens, theirmechanical testing, and comparison of theoretical versus experimental results. Success of these efforts will validate applicability of fiber optic sensors to continuous health monitoring of composite structures."

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

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