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Articles 1 - 5 of 5
Full-Text Articles in Engineering
Determining The Mechanical Properties Of Lattice Block Structures, Nathan Wilmoth
Determining The Mechanical Properties Of Lattice Block Structures, Nathan Wilmoth
ETD Archive
Lattice block structures and shape memory alloys possess several traits ideal for solving intriguing new engineering problems in industries such as aerospace, military, and transportation. Recent testing at the NASA Glenn Research Center has investigated the material properties of lattice block structures cast from a conventional aerospace titanium alloy as well as lattice block structures cast from nickel-titanium shape memory alloy. The lattice block structures for both materials were sectioned into smaller subelements for tension and compression testing. The results from the cast conventional titanium material showed that the expected mechanical properties were maintained. The shape memory alloy material was …
Hybrid Position And Impedance Control Of A Forging Process, Derek Stake
Hybrid Position And Impedance Control Of A Forging Process, Derek Stake
ETD Archive
"Pick and place" robotic material handling has been a key to increase piece rates and reduced variability in forging processes. One of the drawbacks to current "pick and place" robotic material handling methods is the inability to locate the part after a forging operation and move it to the next position in a timely manner. If the billet changes position during the forging process, the manipulator will take longer to find the part and transfer it to the next station or the manipulator will be unable to move the part to the next position correctly which may cause scrap. Another …
Vibration Analysis Of Anisotropic Plates, Special Case: Violin, Chaitanya J. Lomte
Vibration Analysis Of Anisotropic Plates, Special Case: Violin, Chaitanya J. Lomte
ETD Archive
This thesis presents vibration analysis of the top plate of Stradivari violin by creating a 3D model using SolidWorks and finding mode shapes and natural frequencies using SolidWorks simulation. The top plate was affixed to the bottom plate via a side wall following the contour of the violin plates. Assuming the input excitation is sinusoidal, it was applied at the location of bridge where the strings rest on it.. The static component of the force was calculated to be 83.17 N. The first five natural frequencies of the violin top plate are in the range of 150 to 450 Hertz. …
Computational Study Of Savonius Wind Turbine, Asmita C. Chinchore
Computational Study Of Savonius Wind Turbine, Asmita C. Chinchore
ETD Archive
This project involves study of 2-Blade and 3-Blade Savonius vertical wind turbines positioned at different orientations. For a 2-Blade turbine the orientations considered were 0 degree, 45 degree, 90 degree and 135 degree in reference to the direction of the prevailing wind and for the 3-Blade turbine the orientations taken into account were 0 degree, 30 degree, 60 degree and 90 degree in reference to the direction of the prevailing wind. The basic aim of this thesis was to study how the two designs are different from each other and which design produces more power when applied with constant wind …
Aerodynamic Measurements Of A Variable-Speed Power-Turbine Blade Section In A Transonic Turbine Cascade, Ashlie B. Flegel
Aerodynamic Measurements Of A Variable-Speed Power-Turbine Blade Section In A Transonic Turbine Cascade, Ashlie B. Flegel
ETD Archive
The purpose of this thesis is to document the impact of incidence angle and Reynolds number variations on the 3-D flow field and midspan loss and turning of a 2-D section of a variable-speed power-turbine (VSPT) rotor blade. Aerodynamic measurements were obtained in a transonic linear cascade at NASA Glenn Research Center in Cleveland, OH. Steady-state data were obtained for ten incidence angles ranging from +15.8° to -51.0°. At each angle, data were acquired at five flow conditions with the exit Reynolds number (based on axial chord) varying over an order-of-magnitude from 2.12 ₉ 105 to 2.12 ₉ 106. Data …