Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 548 for “"Applied Mechanics"”.
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On the buckling of rectangular plates with internal point support
… State College of Agriculture and Applied Science. Dept. of Applied Mechanics, 1954
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Toward optimal motion planning for dynamic robots : applications on-orbit
… of optimal control, artificial intelligence, and applied mechanics. Methods for robots without dynamics are well-studied and are often practical for real-time deployment on current systems. However, robots that have dynamics, operate with uncertainty, or navigate difficult environments are at the …
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Constitutive modelling and finite element analysis in geomechanics
… finite element code NOSTRUM (developed by the Applied Mechanics Research Unit at the University of Cape Town). Solutions of a series of boundary value problems, including typical mining excavation problems, are presented to illustrate and compare the models.
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Two-dimensional problems of anisotropic elastic materials with an extraordinary degenerate matrix N.
Two-dimensional problems of anisotropic elastic materials with an extraordinary degenerate matrix N.
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Stress distribution at a three-dimensional singularity in anisotropic materials and composites.
Stress distribution at a three-dimensional singularity in anisotropic materials and composites.
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A multiscale finite element method for fluid structure interaction problem.
A multiscale finite element method for fluid structure interaction problem.
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On the foundations of beam theory.
On the foundations of beam theory.
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Investigation of Taylor impact test of isotropic and anisotropic material through geometrical characteristics of specimens
In this thesis, high strain rate properties of isotropic material (a copper alloy) and anisotropic material (2195-T8 aluminum-lithium alloy) are investigated using Taylor impact tests. Coordinate measuring machines (CMMs) are used to measure the shape of specimens after the deformation. The …
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COMPLEX FREQUENCY ANALYSIS OF DAMPED THIN-WALLED BEAMS WITH OPEN CROSS SECTIONS (COUPLED, VIBRATION)
<p>The dynamic equilibrium equations for thin-walled beams of open cross section are derived with reference to an arbitrary system of coordinates. Exact stress resultant-displacement relation of the bending theory of cylindrical shells has been used and therefore the shell curvature, secondary …
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NORMAL MODE SPECTRA OF SOUND WAVES IN VISCOUS SOLID AND FLUID MEDIA WITH PARTICULAR APPLICATIONS TO SHALLOW WATER ACOUSTICS
<p>Sound propagation in shallow water is modelled using the Green's function formalism and normal mode techniques. The water layer is bounded above by a pressure-released condition and below by a halfspace of viscoelastic solid media. Nine different marine sediments are investigated by …
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Simulations of diffusion driven phase evolution in heterogenous solids
<p>With reduction in size, ever greater operational demands are placed on electronics components at all levels of the device, starting from the transistor level to the level of the package and the solder interconnects. Concurrently, there has been a move to more complicated materials systems in …
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A new finite-difference time-domain method applied to an open waveguide structure.
The study makes use of a variation of the Finite-Difference Time-Domain (FDTD) method as first proposed by Yee to simulate electromagnetic field distribution and propagation in an open waveguide structure. In order to prove that this new method is valid, a reflection coefficient is calculated with …
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Filter-bank transforms with exact inverses
… The methods to obtain synthesis filters are applied to discretizations of the continuous wavelet transform using both finite and infinite impulse response filters. If exact reconstruction is not a requisite, it is possible to improve imperfect-reconstruction filter banks so that their inverse …
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Very -Large -Scale Motions in Wall -Bounded Turbulent Flows
Overall, results indicate that the hairpin vortex and its organization into packets is a robust and significant feature of wall-bounded turbulence over a wide range of Reynolds numbers. The hairpin-vortex-packet model of turbulence provides a consistent explanation for the distribution of energy …
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Experimental Investigation of Liquid and Particle -Laden Flows in Microtubes
Since flow blockages are the ultimate form of increased flow resistance, the research emphasis is focused on the mechanisms that lead to blockage. Different blockage mechanisms are observed in different regimes defined by the ratio of particle diameter to tube diameter. For example, for 0.33 D < dp …
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Modeling of Compressibility Effects in Turbulent Boundary Layers
Second, since it has been determined that the acoustic (and pseudosound) component of the flow does not have much influence on the dynamics of the supersonic boundary layer; the fluctuating thermal component was studied as the only source of compressibility effects in the boundary layer. An …
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Disclinations in Homogeneously Deformed Nematic Elastomers
A nematic elastomer is a rubber-like solid formed by cross-linking of a polymeric fluid that includes nematic liquid crystalline molecules as side- or main-chain elements. This thesis explores issues concerned with disclinations---which are tubular neighborhoods in which the material is isotropic …
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