Low Density, Rugged, Shape Memory-Metal RubberT Morph-on-Demand Towed Array Hose Navy SBIR FY2009.1 Sol No.: Navy SBIR FY2009.1 Topic No.: N091-058 Topic Title: Low Density, Rugged, Shape Memory-Metal RubberT Morph-on-Demand Towed Array Hose Proposal No.: N091-058-0455 Firm: NanoSonic, Inc. P.O. Box 618 Christiansburg, Virginia 24068 Contact: J.H. Lalli Phone: (540) 953-1785 Web Site: http://www.nanosonic.com Abstract: NanoSonic specializes in the production of multifunctional, nanostructured morphing airfoils and hydrofoils via Shape Memory-Metal RubberT (SM-MR). SM-MRT would be exploited as a smart towed array hose that can both sense and change its shape under sea-water to reduce damaging strum-induced vibration and optimize hydrophone performance. Our unique layer-by-layer self-assembly processing method yields ultra-lightweight (< 0.99g/cc), yet thick rugged and compliant nanocomposites enabling neutral buoyancy due to the extremely low volume fractions of metal nanoparticles required for conductivity. The electrically conductive component of SM-MRT allows for 1) in-situ sensing of longitudinal flow at greater than 4 degrees and 2) wireless induction pathway stimulating temporary shape change to a more hydrodynamic cross-section to suppress crosswise flow and turn-induced strum and 3) repeatedly return to a circular cross-section upon turn completion. While the specific chemical structure of SM-MRT is proprietary, the hybrid polyurethane SMP is resistant to Exxon Isopar L and offers similar properties (isothermal mechanical -40�C to 50�C, Shore A80, > 100% elongation) to BF Goodrich 58881. The TRL of the morph-on-demand SM-MRT submarine towed array hose would be increased to TRL6 during Phase I and to TRL 9 when demonstrated at Carderock housing a TB-29A acoustic module in Phase III. Benefits: NanoSonic's advanced multifunctional nanostructured, lightweight and rugged Shape Memory Polymers and Shape Memory-Metal RubberT would be developed as an advanced smart morphing hose for passive submarine towed arrays. The smart hose based on an electrically conductive, although unfilled nanocomposite would sense-and-respond to strum inducing turns, thereby suppressing or eliminating Strouhal vortex shedding while improving self-noise performance. The rugged thick hose would permit higher internal fill pressures in excess of 30 psi, while the low density nature of the hose would allow for repeated shape change under water as needed, as well as neutral buoyancy required for horizontal towing. Additional applications for SM-MR include advanced airfoils and hydrofoils for unmanned morphing vehicles, artificial muscles, and highly flexible EMI shielding protective skins. NanoSonic would work with Carderock and our defense prime partner to verify strum reduction via the morph-on-demand hose, and with our commercial partners to bring this product to the Navy. Return