Development of Lightweight and Low Cost Advanced Structural Materials for Off-board Surface Vessels (OBVs)

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,999.00
Award Year:
2006
Program:
STTR
Phase:
Phase I
Contract:
N00014-06-M-0272
Award Id:
77967
Agency Tracking Number:
N064-021-0408
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2 State Street Suite 300, New London, CT, 06320
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
112716357
Principal Investigator:
Ann Stokes
Principal Scientist
(781) 861-2039
astokes@aphysci.com
Business Contact:
David Horne
Vice President/Business M
(860) 440-3253
dhorne@aphysci.com
Research Institution:
UMASS LOWELL
Julie Chen
One University Avenue
Lowell, MA, 01854
(978) 934-2992
Nonprofit college or university
Abstract
Off-board vehicles deployed in littoral environments are subjected to severe operational loads, including wave slamming, high-speed collision with debris, and underwater explosions. They additionally serve as sensor platforms, and would benefit from reduced self- and radiated noise for towed array performance and mine defense. Consequently, we propose to exploit the flexibility of design offered by modern composites to achieve a novel OBV hull design integrating beneficial structural, shock, and stealth characteristics. Novel design features are threefold. First, the composite hull cross-section contains a compliant viscoelastic core material offering isolation from low-level transient events and acoustic isolation and damping, in addition to its structural function. Second, we propose a novel composite stiffener design that integrates structural function with large shock protection, by minimizing stress concentrations at structural discontinuities. Third, to address the occurrence of stress concentrations at geometric discontinuities state-of-the-art forming techniques are proposed that allow for the fabrication of highly curved junctions without appreciable loss of strength. Our proposed Phase I effort includes concept performance predictions (Applied Physical Sciences, Inc), static and dynamic validation tests (University of Massachusetts- Advanced Composite Materials and Textiles Research Laboratory), and a benefit trade-off analysis against weight and cost (Marine Applied Physics Corporation.) BENEFITS: The successful completion of the proposed effort will yield a composite hull design that significantly improves the shock and impact survivability and sensor related mission performance of the Navy's OBV or similar marine vehicles. Certain of our novel hull design features may be patentable and have application to small commercial or pleasure boats, e.g. our composite forming technique or integrated stiffener-mount design.

* information listed above is at the time of submission.

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