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04-19-2013

Carbon Fiber-Reinforced Radial Shaft

Fiber-Composite Shaft has Passed the Engine Test

Carbon Fiber-Reinforced Radial Shaft

A fiber-composite radial shaft from Leichtbau-Zentrum Sachsen GmbH, Dresden, Germany, withstood a 1,200-hour engine test in January. The new technology is thus ready for operation in aircraft engines. This marks the conclusion of a three-year joint development and validation phase with the engine manufacturer Rolls Royce. The fiber-reinforced resin part allows speeds up to 30 % higher,with a weight saving of 20 %.

The new hybrid construction, consisting of a CFRP shaft with complex metal load transfer elements, also fits into the conventional space for aircraft engines. For this purpose, a custom layer structure was developed for the carbon shaft to ensure that the torques can be transmitted and that it has a high flexural stiffness. That leads to a significant increase in its eigenfrequency. This effect, in which the shaft starts to oscillate can be avoided by using the carbon shaft. To transmit the high torsional loads to the fiber composite shaft without local thickening of the metal end pieces, a special joint was developed. The 200 g CFRP shaft can transmit high forces, which can plastically deform a massive experimental end piece of high-strength steel.

Company profile

TU Dresden - Institut für Leichtbau u. Kunststofftechnik

Holbeinstr. 3
DE 01307 Dresden
Tel.: 0351 463-38142
Fax: 0351 463-38143

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