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A Finite Element Study of Stresses in Stepped Splined Shafts, and Partially Splined Shafts Under Bending, Torsion, and Combined Loadings
(Virginia Tech, 1999-05-04)
<p>The maximum von Mises stress is calculated for solid finite element models of splined shafts with straight-sided teeth. One spline shaft is stepped with larger diameter section containing spline teeth and the smaller ...
Heat Transfer Issues in Thin-Film Thermal Radiation Detectors
(Virginia Tech, 1999-12-15)
The Thermal Radiation Group at Virginia Polytechnic Institute and State University has been working closely with scientists and engineers at NASA's Langley Research Center to develop accurate analytical and numerical models ...
A Coupled Heat Transfer and Electromagnetic Model for Simulating Microwave Heating of Thin Dielectric Materials in a Resonant Cavity
(Virginia Tech, 1999-12-09)
Microwave heating is an emerging but still underutilized tool in modern industrial applications. The task of designing microwave applicators for heating industrial materials with temperature-dependent properties is ...
Development of a Standardized Method for Actuator Characterization using Active Control of Impedance
(Virginia Tech, 1999-10-07)
<p>Presently, there is no standard testing procedure for piezoelectric actuators. It is then very difficult for a very specific given application to design the most efficient actuator in terms of blocked force, displacement, ...
Prediction and Measurement of Thermal Exchanges within Pyranometers
(Virginia Tech, 1999-10-28)
The Eppley Precision Spectral Pyranometer (PSP) is a shortwave radiometer that is widely used in global networks to monitor solar irradiances at the earth's surface. Within the instrument, a blackened surface is in intimate ...
Computational Fluid Dynamics Simulations of Hydraulic Energy Absorber
(Virginia Tech, 1999-07-21)
Hydraulic energy absorbers may be described as high-loss centrifugal turbomachines arranged to operate as stalled torque converters. The device absorbs the kinetic energy of a vehicle in motion and dissipates the energy ...
Thermal Management of Power Electronic Building Blocks
(Virginia Tech, 1999-02-10)
Development of Power Electronic Building Block (PEBB) modules, initiated through the Office of Naval Research (ONR), is a promising enabling technology which will promote future electrical power systems. Key in this ...
Reduction of Unsteady Stator-Rotor Interaction by Trailing Edge Blowing Using MEMS Based Microvalves
(Virginia Tech, 1999-04-16)
This research performs an experimental study of a
trailing edge blowing system that can adapt to
variations in flow parameters and reduce the
unsteady stator-rotor interaction at all engine
operating conditions. The fan ...
Optimal Vibration Suppression Using On-line Pole/Zero Identification
(Virginia Tech, 1999-12-10)
Vehicles and mechanisms which must perform very precise tasks or maneuvers require controllers to compensate for their inherent structural flexibility. Many of these applications involve structures that have time-varying ...
Computer-Aided Design Software for the Undamped Two-Dimensional Static and Dynamic Analysis of Beams and Rotors
(Virginia Tech, 1999-05-03)
The objective of this research work was to develop a design tool to analyze and design undamped beam and rotor systems in two dimensions. Systems modeled in two dimensions, such as beams with different moments of inertia, ...