Aircraft parts made of carbon-fiber composites behave differently than parts made of aluminum at the different pressures that an aircraft subjected to during the flight. But what exactly happens is not studied in detail.
Within the framework of the EU research project Clean Sky Fraunhofer LBF in Darmstadt have developed test equipment based on fiber optics to study the components of carbon fiber composites behave in flight.
the researchers Conchin Contell Asins and Oliver Schwarz Haupt concluded that the strain gauges used for measurements on metal objects were not useful, because they are based on differences in electrical resistance at the deformation and accuracy becomes too bad.
the measured changes in a five-by-three meters long ceiling section of the fiber composite in the fuselage extending from the cockpit to the wing attachment at a high winged plane. There are some highly charged during the flight.
The thin glasfiberna mounted along the component on the plane’s interior. With the help of a special software has flight data such as altitude, speed and maneuvers could be run together with data from the fiber optics.
The researchers were then able to see the precise deformation in the carbon fiber panel for different maneuvers that the plane performed. Data from the strain gauges could reverse exactly how the plane had navigated during sea trials.
By accurately measuring the composite components behave under real flight, manufacturers can optimize so that not too much material is used. Today is calculated for safety’s sake the material on the high side, but that in many cases unnecessarily heavy components.
Aircraft Manufacturers can now analyze the results of the Clean Sky JTI Green Regional Aircraft Platform under the EU’s Seventh Framework Programme. By optimizing composite components of the aircraft may be unnecessary material is saved, which means lower fuel consumption.
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