DCASS

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This content is associated with the Dayton-Cincinnati Aerospace Sciences Symposium.

Materials Networking

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False color Scanning Electron Microscopy image taken of a high temperature thermoset open cell foam. The ligaments and struts of the foam have been coated with a shape memory polymer. The macroscopic foam works as a shape memory foam. A temporary shape can be applied that retains its structural integity up to 75C. Above 75C it relaxes back to its permanent shape and can be shaped into a different temporary form. This can be locked in by cooling back to RT.

Nano Skeleton

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False color Scanning Electron Microscopy image of a polyurethane with embedded carbon nanotubes. The foam structure of the carbon nanotube nanocomposite allows large deformations in compression. The polyurethane is a shape memory polymer and different shapes can be locked into the material. The presence of carbon nanotubes allows remote triggering of the shape recovery process from temporary to permanent shape via current or infrared light.

Computational Study of a DISI Rotary Engine

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Due to the inherent low fuel efficiency of rotary engines and increasing gas prices, application of the rotary engine in conventional automobiles is decreasing. This project seeks to introduce DISI technology to the rotary engine, thus increasing the fuel efficiency and allowing it to be another efficient power source option for aero and automotive applications.

Break Out The Guns!

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This image depicts operation of a 9-stick Gatling-Gun micro PPT thruster firing. Sticks fire seqentially from 1 to 9, but long expose setting captures all 9 firing in brilliant detail.

Alien On the Tip of a Plasma Torch Cathode Tip?

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Various structures (and perhaps even an alien) can be seen in the ~600 micrometer diameter crater formed on the tip of a plasma torch igniter cathode. The structures were formed as the melted tungsten at the tip solidified while cooling from temperatures in excess of 6600°F.

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