From Aero Engines of the future it is demanded to provide more power, while the fuel consumption and the mass should decrease. In order to reach the goal of an increasing specific power or a decreasing specific mass, respectively, structural optimization methods, like the topology optimization, find their way into the design process to a greater extent. Additionally one is going to consider more and more fiber reinforced composites as a substitute for titanium alloys in the “cold” structure of the engine. Composite materials offer significant advantages especially concerning the specific mass and the adjustability of their stiffness properties. Unfortunately it is very difficult to predict damage and fracture of such orthotropic materials. The presentation will show the results of a topology optimization of the titanium intermediate-casing of a Rolls-Royce aero engine. Further on the material of the casing will be substituted by a carbon fiber reinforced composite. The fiber orientations and layer thicknesses of the composite are optimized under certain strength constraints, which are described by a modern fracture plane based failure criterion (NASA LaRC04 criterion [6]). Such a failure criterion has a lot of advantages compared to classical ones like Tsai-Hill, Tsai-Wu, ..., which e.g. do not distinguish between fiber and inter-fiber fracture and are therefore not able to predict the type of inter-fiber fracture. Finally the results of the optimization with the current material titanium will be compared to the results of the composite-made intermediate casing in terms of their load capacity and weight.
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ASME Turbo Expo 2008: Power for Land, Sea, and Air
June 9–13, 2008
Berlin, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4315-4
PROCEEDINGS PAPER
Topology-Optimized Intermediate Casing of Aero Engine and Comparative Evaluation of Titanium and Composite Architecture in Terms of Load Capacity and Weight Reduction
Markus Kober,
Markus Kober
Brandenburg University of Technology - Cottbus, Cottbus, Germany
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Olaf Lenk,
Olaf Lenk
Rolls-Royce Deutschland Ltd. & Co. KG, Blankenfelde-Mahlow, Germany
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Thomas Klauke,
Thomas Klauke
Brandenburg University of Technology - Cottbus, Cottbus, Germany
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Arnold Ku¨hhorn
Arnold Ku¨hhorn
Brandenburg University of Technology - Cottbus, Cottbus, Germany
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Markus Kober
Brandenburg University of Technology - Cottbus, Cottbus, Germany
Olaf Lenk
Rolls-Royce Deutschland Ltd. & Co. KG, Blankenfelde-Mahlow, Germany
Thomas Klauke
Brandenburg University of Technology - Cottbus, Cottbus, Germany
Arnold Ku¨hhorn
Brandenburg University of Technology - Cottbus, Cottbus, Germany
Paper No:
GT2008-50644, pp. 69-79; 11 pages
Published Online:
August 3, 2009
Citation
Kober, M, Lenk, O, Klauke, T, & Ku¨hhorn, A. "Topology-Optimized Intermediate Casing of Aero Engine and Comparative Evaluation of Titanium and Composite Architecture in Terms of Load Capacity and Weight Reduction." Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea, and Air. Volume 5: Structures and Dynamics, Parts A and B. Berlin, Germany. June 9–13, 2008. pp. 69-79. ASME. https://doi.org/10.1115/GT2008-50644
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