Weight minimization of Al-Ti compressor blade through volume fraction optimization

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2004-01-01
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Sobti, Anurag
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Aerospace Engineering

The Department of Aerospace Engineering seeks to instruct the design, analysis, testing, and operation of vehicles which operate in air, water, or space, including studies of aerodynamics, structure mechanics, propulsion, and the like.

History
The Department of Aerospace Engineering was organized as the Department of Aeronautical Engineering in 1942. Its name was changed to the Department of Aerospace Engineering in 1961. In 1990, the department absorbed the Department of Engineering Science and Mechanics and became the Department of Aerospace Engineering and Engineering Mechanics. In 2003 the name was changed back to the Department of Aerospace Engineering.

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1942-present

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  • Department of Aerospace Engineering and Engineering Mechanics (1990-2003)

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The weight reduction of a structure is of utmost importance for the aerospace applications. One of the efficient ways to reduce the weight is the use of heterogeneous materials. A heterogeneous material is one that is composed of two or more different materials in a certain proportion. The rapid prototyping processes have made it possible to fabricate a single structure by the deposition of different materials at different locations, hence, allowing the material properties to be controlled in the desired manner throughout the structure. In this work, aluminum and titanium have been used to minimize the weight of a typical axial compressor rotor blade. The focus is on optimizing the volume fractions of Al-Ti throughout the structure, in the presence of certain constraints. Three cases are presented, two of them are for the plate where once the material is allowed to vary just in one direction and second where the material is allowed to vary along all three directions and the third one is that of the compressor rotor blade itself. The results from the sample plate case give a good insight into the desired material distribution, in the light of which the optimization for the blade has been performed to minimize the weight.

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Thu Jan 01 00:00:00 UTC 2004