Browsing Mechanical engineering by Issue Date
Now showing items 1-20 of 431
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Permanent growth characteristics of alloy cast iron when exposed to a temperature gradient.
(1932)The object of this investigation was to determine the growth characteristics of cast iron with varying alloy additions, when exposed to a temperature gradient and to repeated heating. That is, it was to measure the change ... -
Investigation of the stresses in a circular disk of non-uniform thickness due to bending, and procedures used in casting a suitable photoelastic model
(1952)The purpose of the work reported in this thesis was to further the Investigation of the problem of bending in a circular disk of variable thickness. Many difficulties were encountered in this research arising from the ... -
On the structural and acoustic design of guitar soundboards
(1990)An assumed mode model of a guitar soundboard has been built and experimentally verified. The frequency range of interest was from 55 to 880 Hertz, covering the frequency range of the fundamentals of the notes played on the ... -
A numerical study of attached oblique detonation
(1993)The goal of this research is to develop a predictive capability for oblique detonation waves (ODWs). Planar wedge flows and axisymmetric conical flows are considered. The Rankine-Hugoniot solution is reviewed first, which ... -
Analytical system dynamics
(1995)A unified approach for modeling engineering systems is presented for systems comprised of mechanical, electrical, fluid and thermal elements. The method of analysis is based on the energy methods of Lagrange, generalized ... -
The dynamics of variable-density turbulence
(1995)The dynamics of variable-density turbulent fluids are studied by direct numerical simulation. The flow is incompressible so that acoustic waves are decoupled from the problem, and implying that density is not a thermodynamic ... -
On the simulation and modeling of turbulent reacting flows
(1996)A computational algorithm is described for Direct Numerical Simulation (DNS) of a reactive plume in spatially-evolving, grid turbulence. The chemistry follows the single-step, irreversible, global reaction: $Fuel+(r)Oxid ... -
Experimental and numerical analysis of abrasive waterjet drilling of brittle materials
(1998)The interaction between abrasive waterjet (AWJ) and brittle materials, as well as lated machining mechanisms, was studied using a hybrid experimental - numerical analysis approach. First, the machineability of ceramic ... -
Wavelet techniques for chaotic and fractal dynamics
(1999)A novel wavelet based denoising technique is developed and shown to be more effective on average than waveshrink in denoising contaminated chaotic signals. A chaotic beam experiment is used to verify its effectiveness.Correlation ... -
Some fundamental issues of constrained layer damping treatments
(2000)Constrained layer damping (CLD) treatment is a widely used surface damping treatment for controlling vibration and noise. The most commonly used mathematical formulation for a beam with the CLD treatment was developed by ... -
Intermittent turbulence in the very stable Ekman layer
(2000)This study describes a Direct Numerical Simulation (DNS) of a very stable Ekman layer in which a constant downward heat flux is applied at the lower boundary, thus cooling the fluid above. Numerical experiments were performed ... -
An investigation of mechanical behavior and failure mechanisms of composite T-joints with transverse stitching
(2001)A new low cost damage tolerant method of joining load-bearing composite structures using two-dimensional dry fabric preforms with transverse stitching and a novel fiber insertion process with resin transfer molding has ... -
A 3-dimensional experimental and numerical analysis of the T* E integral in aluminum fracture specimens
(2001)The T*epsilon integral, an elastic-plastic toughness parameter which is based on the incremental theory of plasticity, has been calculated experimentally and numerically in two-dimensional (2-D) metallic specimens. These ... -
Basis functions for use in direct calibration techniques to determine part-in-hand location
(2001)A common difficulty in implementing flexible automation is the complexity and lack of robustness of the intercalibration of all the components of the workcell and the part itself.A novel approach to the calibration problem, ... -
A numerical investigation of the gas-phase dynamics of small pool fires
(2002)This work is an investigation, through direct numerical simulation, of the gas-phase dynamics of small circular pool fires. The objectives are: to determine the mechanisms that contribute to vortex formation and their ... -
The conditional moment closure method for modeling lean premixed turbulent combustion
(2003)Natural gas fired lean premixed gas turbines have become the method of choice for new power generation systems due to their high efficiency and low pollutant emissions. As emission regulations for these combustion systems ... -
Multilevel, subdivision-based, thin shell finite elements: development and an application to red blood cell modeling
(2003)This work focuses on efficient hierarchical, numerical simulation of the deformation of thin walled structures. We address the need to characterize and improve the performance of the subdivision thin shell finite element ... -
Design forecasting: a method for performing DFX analyses in complex product design
(2004)Design Forecasting is modeling methodology for performing DFX analyses such as Life Cycle Assessment and the Modified Westinghouse Method earlier in the design of automobiles and other complex products. Specifically, Design ... -
Fault detection of rolling element bearings
(2005)The early detection of bearing failure requires methods that are sensitive to impulsive signals and their changes. The difficulty of early bearing defect detection is that the signal component generated by early defect is ...