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Relevant bibliographies by topics / Applied Mechanics. Engineering, Mechanical. Engineering, Environmental / Dissertations / Theses

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Dissertations / Theses on the topic 'Applied Mechanics. Engineering, Mechanical. Engineering, Environmental'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Nguyen, Tan Danh. "Regional estimation of extreme rainfall events." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84300.

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The first part of the research deals with the estimation of extreme rainfalls for locations where rainfall records are sufficiently available (gaged sites); the second part is concerned with cases where rainfall data are limited (partially-gaged sites); and finally the third part involves the most complex situation where rainfall data are unavailable (ungaged sites).<br>For gaged sites, two methods were developed for estimating the annual extreme (AE) rainfalls based on the simple scaling behaviour of the first three non-central moments (NCMs) of the AE rainfall processes and using the

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2

Almherigh, Mohamed Abdalla Mohamed. "Evaluation of finite element analysis techiques applied to a floating offshore wind turbine." Thesis, University of Salford, 2005. http://usir.salford.ac.uk/2216/.

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The work presented here is a research thesis of the Ph. D programme in The School of Computing, Science & Engineering at The University of Salford UK. The work presents the evaluation of using explicit finite element techniques for structural non-linear dynamic analysis of a floating offshore wind turbine used for harnessing wind kinetic energy and converting it to electricity. The LS-DYNA3D explicit finite element analysis programme is used in performing the evaluation of the analysis and in creating a full scale model typical to the one evaluated. The developed model (case study) is a 1.4MW

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3

Hornick, Heather René. "Environmental analysis and prediction of transmission loss in the region of the New England Shelfbreak." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55299.

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Thesis (S.M.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 140-141).<br>A confluence of several coastal oceanographic features creates an acoustically interesting region with high variability along the New England Shelfbreak. Determining the effect of the variability on acoustic propagation is critical for sonar systems. In the Nantucket Shoals area of the Middle

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4

Hedkvist, Simon. "Throughflow Study on Bleeding for Part Load Compressor Operation." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75337.

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The transition of the European energy grid to renewable energy sources is increasing the demand for back-up capacity with high flexibility. Current fossil fuel plants are continuously being forced into part load operation, where they are limited by pollution regulations that dictate their minimum environmental load, MEL. The power plants need to shut down when they no longer can comply to pollution regulations, but shutting down means that they can't act as quick back-up for the energy grid. Thus the EU project Turbo-Reflex aims to retrofit existing power plants in order to improve MEL by exte

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5

Jakuba, Michael Vavrousek 1976. "Stochastic mapping for chemical plume source localization with application to autonomous hydrothermal vent discovery." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38931.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2007.<br>Includes bibliographical references (p. 313-325).<br>This thesis presents a stochastic mapping framework for autonomous robotic chemical plume source localization in environments with multiple sources. Potential applications for robotic chemical plume source localization include pollution and environmental monitoring, chemical plant safety, search and rescue, anti-terrorism, narcotic

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6

Ramakrishnan, S. 1964. "Mechanics of particulate media: A lattice-type approach." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/289522.

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This research is aimed at understanding the mechanical behavior of particulate/granular media using the power of lattice based techniques. In the lattice type model, a particulate assembly is simulated as a lattice/truss network. Nodes are relocated at contacts between a particle and its neighbors/boundaries and are linked by bars to each other. Each particle is replaced by a lattice within its microstructure and particles interact through load transfer at nodes. Constraints are prescribed at the nodes of the lattice to simulate active, deactivated, and reactivated contacts. An assembly of par

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7

Lea, Patrick D. "Fluid Structure Interaction with Applications in Structural Failure." Thesis, Northwestern University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3605735.

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<p> Methods for modeling structural failure with applications for fluid structure interaction (FSI) are developed in this work. Fracture as structural failure is modeled in this work by both the extended finite element method (XFEM) and element deletion. Both of these methods are used in simulations coupled with fluids modeled by computational fluid dynamics (CFD). The methods presented here allow the fluid to pass through the fractured areas of the structure without any prior knowledge of where fracture will occur. Fracture modeled by XFEM is compared to an experimental result as well as a t

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8

Bulca, Ferhan. "The kinematics and workspace analysis of platform mechanisms /." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34706.

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This thesis concerns parallel, platform mechanisms, consisting of two distal links that are connected to each other by a set of open kinematic chains, called legs. Particularly, mechanisms with redundant loops, kinematically quite challenging, are investigated. Existing methods of analysis and their shortcomings are outlined and alternatives which help to overcome them are developed.<br>Definitions and analyses of platform mechanisms, mobility and degree-of-freedom are reviewed. Kinematic analysis and workspace determination of platform mechanisms are thoroughly investigated.<br>An algebraic m

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9

Bande, Gilbert. "A combined approach for analysis of single crystal nickel base superalloys /." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37868.

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The purpose of this research is to develop a new tool for mechanical design and analysis of single crystal (SC) nickel base superalloys used in gas turbine engine components. The principle of this tool is based on the extension of the predictive models for isotropic material behavior to anisotropic materials such as SC nickel, base superalloys. This objective is achieved by combining the two main approaches used in the literature for SC materials development: the macroscopic approach and the microscopic approach. For that reason, this theory is designated as the "combined approach " (CA).<br>T

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10

Babarutsi, Sofia. "Modelling quasi-two-dimensional turbulent shear flow." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70223.

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A two-length-scale turbulence model is introduced in this thesis for the computation of quasi-two-dimensional turbulent shear flow with two distinct length scales of motion. In the model, the turbulence motions of the two distinct length scales are computed separately. The small-scale turbulence is treated as a background component locally in equilibrium while the large-scale turbulence is simulated using a second-order closure procedure. The development of the turbulent shear flows depends on the rate of energy transfer from the large-scale to the small-scale turbulence. Two mechanisms are id

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11

Basik, Beata-Marie. "Direct simulation Monte Carlo model of a couette flow of granular materials." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60433.

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Since life-threatening natural phenomena, such as, snow avalanches and lava flows, and many industrial and agricultural material handling processes may be classified as granular flows, establishing constitutive relationships which model granular flow behaviour is of prime importance. While laboratory experiments attempting to support granular flow theory have been plagued by poor instrumentation, numerical simulations are becoming increasingly helpful in understanding the nature of these flows. The present investigation describes such a simulation developed within the framework of the Direct S

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12

Roy, Matthew MacGregor. "Design and fabrication of a lightweight robotic manipulator." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37282.pdf.

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13

Anderson, Todd Alan 1971. "Exact solution of finite geometry composite panels under transient surface loading." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/278508.

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The exact three-dimensional transient solution of a multi-layer orthotropic panel subjected to transverse loading is presented. The finite geometry panel, supported by rollers, is subjected to an arbitrarily distributed surface load. Governing equations, derived from Reissner's functional, are solved by applying Fourier or Laplace transformation in time and enforcing the continuity of traction and displacement components between the adjacent layers. Material damping is incorporated into the analysis through complex material constants. The accuracy of the present analysis is established by cons

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14

Guven, Ibrahim. "A coupled finite element-boundary element method for two dimensional transient heat conduction and thermoelastic analyses." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289183.

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A new algorithm for coupling boundary and finite element methods is developed for transient two dimensional heat conduction and thermoelastic analyses of regions with dissimilar materials and geometric discontinuities. Such regions are susceptible to failure initiation in electronic devices. As the component size decreases while enhancing performance, the accurate prediction of thermal and thermoelastic response of such devices is critical for achieving acceptable design. This study concerns both the conduction heat transfer and thermoelasticity. Solution to transient heat conduction equation

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15

Liu, Jia. "Buckling Induced Functionality in Soft Structures." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493413.

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A variety of instabilities can be triggered when elastic structures are subjected to mechanical loadings. While such instabilities have traditionally been considered as a failure, a new trend is emerging in which the dramatic geometric changes induced by them are harnessed to enable new functionalities. In this thesis, I report a systematic study on the morphology and functionality changes induced by buckling in soft structures. Using a combination of theoretical, numerical and experimental analyses, I investigate the non-linear response of a variety of one dimensional, two dimensional and t

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16

Zhang, Shilong. "Lumped-parameter modelling of elastically coupled bodies: Derivation of constitutive equations and determination of stiffness matrices." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284462.

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Modelling of elastically coupled rigid bodies is an important research topic in multibody dynamics. We consider the problem of modelling what can be called flexural joints, where two essentially rigid bodies are coupled by a substantially more elastic body. For modelling general elastic couplings one would like to have generically applicable, lumped parameter, intuitive, Euclidean geometric, accurate models with desirable physical symmetries. The model constitutive equations should be easily and quickly computable. For purely elastic coupling the constitutive equations should be truly energy c

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17

Barut, Atila 1966. "Nonlinear thermo-mechanical analysis of stiffened composite laminates by a new finite element." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282754.

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A new stiffened shell element combining shallow beam and shallow shell elements is developed for geometrically nonlinear analysis of stiffened composite laminates under thermal and/or mechanical loading. The formulation of this element is based on the principal of virtual displacements in conjunction with the co-rotational form of the total Lagrangian description of motion. In the finite element formulation, both the shell and the beam (stiffener) elements account for transverse shear deformations and material anisotropy. The cross-section of the stiffener (beam) can be arbitrary in geometry a

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18

García, Aragón Juan Antonio. "Experimental and analytical investigations of granular-fluid mixtures down inclines." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41021.

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Granular-fluid mixtures flowing down an incline in the grain-inertia regime were studied experimentally and analytically. The equations of motion are based on the kinetic theory for granular flow. The boundary conditions are formulated following two methods. The first is a simple mechanical approach based on the energy exchange at the wall. The other is based on the kinetic theory for granular flow. Solutions for dry granular flow down a chute are studied in order to compare both methods. The extension of the kinetic theory presented here, includes drag forces resulting from the interstitial f

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19

Yi, Jun 1959. "Stress compatible bimaterial interface elements with application to transient dynamic stress analysis." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22842.

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Conventional displacement-based finite element programs do not yield unique values of stress components which ought to be continuous at element interfaces. The errors, being the differences from the correct unique values, become unacceptably large at a bimaterial interface when the moduli of the two materials are significantly different.<br>This thesis formulates and implements new finite elements for obtaining the correct values of the stress components, both continuous and discontinuous ones, at bimaterial interface points under general dynamic loading, assuming linear, isotropic, elastic ma

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20

Mseikeh, Camille Hanna. "Wrinkling of membranes, plates, and shells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30343.pdf.

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21

Shariatmadar, Hashem. "Seismic response of connections in precast concrete double-tees." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30386.pdf.

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22

Massicotte, Paul. "Dynamic optimization of job allocation using constant job-mix stages and priority factors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37271.pdf.

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23

Tvedt, Kristofer Eugene 1963. "Determination of contact stress using gap finite element method." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278152.

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The gap finite element uses the Richard equation to account for the nonlinearity in the boundary condition changes during deformation. This is accomplished by replacing the boundary nonlinearity with an equivalent material nonlinearity within the finite element program and using an incremental solution method. The gap element is developed as a special element with easily obtainable input parameters. The gap element is used to predict high stresses in local areas related to the contact of structural bodies. The major advantage to using a finite element solution with a gap element over a classic

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24

Wang, Zhichao. "Disturbed state constitutive modeling and testing of solders in electronic packaging." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279828.

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Accuracy of fatigue life prediction of solder joint materials using the finite element method (FEM) depends on realistic and reliable constitutive models and the FEM procedure itself. The effectiveness and accuracy of a constitutive model to simulate and predict the behavior of materials strongly depends on consistent, reliable and precise experimental data. In this research, a thermomechanical digital image correlation test device has been developed to investigate solder joint material behavior under thermal mechanical and cyclic loading. The test device is composed of two high precision actu

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25

Beal, Roger Zack. "A study comparing changes in loading conditions of an extended service life system using aluminum 2024-T351." Thesis, The University of Utah, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1569706.

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<p> The current fiscally austere environment prevalent in the military and industry is driving extreme measures to save money. In the United States Air Force, this has driven enormous efforts to trim sustainment spending on extended life aircraft. The challenge to the aerospace engineer is to ensure flight safety in the midst of this economic pressure. </p><p> One method of cutting costs is to increase the time an aircraft is in service by delaying the point when the aircraft is taken out of service for depot maintenance. To ensure flight safety, in depth fatigue and fracture analysis n

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26

Ruparel, Tejas. "Multiple Grid Multiple Time-Scale (MGMT) Simulations in Linear Structural Dynamics." Thesis, The George Washington University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3669113.

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<p> The work presented in this dissertation describes a general algorithm and its Finite Element (FE) implementation for performing concurrent multiple sub-domain simulations in linear structural dynamics. Using this approach one can solve problems in which the domain under analysis can be selectively discretized spatially and temporally, hence allowing the user to obtain a desired level of accuracy in critical regions whilst improving computational efficiency globally. The mathematical background for this approach is largely derived from the fundamental principles of Domain Decomposition Meth

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27

Wu, Fei. "Parallel computational methods for constrained mechanical systems." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282561.

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Two methods suitable for parallel computation in the study of mechanical systems with holonomic and nonholonomic constraints are presented: one is an explicit solution based on generalized inverse algebra; the second solves problems of this class through the direct application of Gauss' principle of least constraint and genetic algorithms. Algorithms for both methods are presented for sequential and parallel implementations. The method using generalized inverses is able to solve problems that involve redundant, degenerate and intermittent constraints, and can identify inconsistent constraint s

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28

Crk, Vladimir 1958. "Component and system reliability assessment from degradation data." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282820.

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Reliability estimation of highly reliable components, subsystems and systems has become very difficult using the traditional accelerated life tests. Therefore, there is a need to develop new models that will determine the reliability of such components, systems or subsystems, one of which is modeling a long term performance degradation. The proposed method is more general than any of the existing ones. It can be applied to any system, subsystem or component whose degradation over time can be identified and measured. It is assumed that the performance degradation is caused by a number, d, of in

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29

Garapati, Sri Harsha. "Analytical and Numerical Modeling of Assembly Procedures of Steel Fulcra of Bascule Bridges." Thesis, University of South Florida, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557075.

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<p> To model shrink-fitting in metal components, an analytical model for two long compound cylinders with temperature dependent material properties and interference between them is developed for calculating transient temperatures and stresses. A finite element model is developed for the same geometry which incorporated the temperature dependent material properties. A convergence study is performed on the finite element and analytical model. The finite element model is validated by comparing the approximations of finite element model with the analytical solution. </p><p> In an assembly proce

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30

Buyuk, Murat. "Development of A Tabulated Thermo-Viscoplastic Material Model with Regularized Failure for Dynamic Ductile Failure Prediction of Structures under Impact Loading." Thesis, The George Washington University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3597748.

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<p> It is important to understand the dynamic failure behavior of structures subjected to impact loading in order to improve the survivability. Materials under impact are utterly affected by large deformations, high strain-rates, temperature softening and varying stress-states, which finally may lead to failure. It is shown that the impact characteristics are prone to change with several independent factors such as; impact speed, material thickness, and shape and orientation of the impacting object. Validated numerical simulations of impact tests reveal that the failure on ductile metals occu

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31

Stone, Robert Michael 1957. "Strength and stiffness of cellular foamed materials." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/289577.

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The use of cellular foams as a core material in light-weight optical and structural systems is of considerable interest. Research and development of these systems, however, have been hampered by the lack of material property data and uncertainty in the use of various suggested material characterizations and the associated constants of proportionality. ASTM standards were researched and, for the most part, found inadequate for testing cellular foam materials. The compression, tension and shear test methods developed are presented, as well as the results from physical tests on closed-cell SXATM

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32

Brousseau, Patrick. "Numerical study of extrudate swell in circular and annular dies." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60439.

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Extrudate swell is an important phenomenon in polymer extrusion, affecting many polymer processes. The ability of predicting swell, using rheological properties of the resin, would help the design and operation of plastics processing equipment. Different techniques for predicting swell are reviewed.<br>A computer program has been written to predict steady-state, isothermal extrudate swell in annular and circular dies. The equations of motion and continuity have been solved along with selected constitutive relations. Newtonian, power-law and the viscoelastic Maxwell and Giesekus rheological mod

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33

Kaufmann, Matthew Vernon 1969. "Finite element and analytical methods for analyzing interfacial thermal resistance." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278334.

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In this thesis, the phenomena of thermal contact resistance is examined from both an analytical and numerical standpoint. Strong emphasis is made on the differentiation between the macroscopic and microscopic mechanisms and their separate effects on the thermal resistance at the interface of two unbonded materials. Of particular interest is the interface between two dissimilar materials. A full analysis of the macroscopic influence of thermal strains on the deformations at the interface is presented. The dependence of interfacial thermal resistance on the direction of heat flow is explained. T

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34

Dube, Manu. "Constitutive modeling of joining materials in electronic packaging." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280470.

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Modeling simplifications for complex material behavior may lead to unanticipated errors under generalized loading conditions, which are difficult to detect in finite element analyses. This work analyzes existing models under simple loading conditions where the nature of the results is known a priori, and proposes new models to overcome the limitations detected. Elastic and elastoplastic formulations for loading-dependent material parameters are generalized, and limitations of the rate-dependent elastoplastic simulation and the Perzyna viscoplastic formulation are discussed. A yield function th

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35

Fang, Zhibin Sun Wei. "Image-guided modeling, fabrication and micromechanical analysis of bone and heterogeneous structure /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/549.

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36

Vionnet, Carlos Alberto. "Analysis of lubricant flows within the microgap of rotary lip seals." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186465.

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The study of a thin, incompressible Newtonian fluid layer trapped between two almost parallel, sliding surfaces has been actively pursued in the last decades. This subject includes lubrication applications such as slider bearings or the sealing of non-pressurized fluids with rotary lip seals. When a viscous lubricant flows between an elastic body and a rigid surface, the contact geometry may undergo substantial deformation affecting the flow field of the lubricant. Therefore, a coupled model between an elastic ring and the fluid film underneath it is proposed. Initially, a linear stability ana

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37

Hu, Kai Xiong. "Stress and fracture analysis for systems with inhomogeneities." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186588.

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The inhomogeneities situated in materials render the diversification of composite families, and can provide synergistic effects for tailoring materials to a specified and often hostile environment. The work presented here focuses on the fracture and stress analysis of systems with various inhomogeneities. In Chapter 1, interactions among cracks and rigid-line inclusions are investigated. Rigid-line inclusions are represented by a distribution of forces while cracks are modeled by the standard dislocation approach. Chapter 2 presents an analysis of composite systems with interacting cracks and

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38

Tonoyan, Arsen V. "Finite element mesh optimization using genetic algorithms." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280756.

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In finite element analysis, structures are modeled as meshes of elements and nodes appropriate for the geometry, boundaries and loading of each structure. Typically, it is desirable to have a mesh which is finer in parts of the structure where stress gradients are high and coarser where such gradients are low. This is usually done by experienced engineers using intuition and previous experience. Otherwise, a fine mesh throughout the structure can be used which results in high computational costs. In this work, the possibility of using genetic algorithms for optimizing finite-element meshes is

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39

Reba, Ramona Andris. "A theoretical study of leading-edge devices for active and passive control of wake-airfoil interaction noise." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284280.

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A theoretical analysis is developed for control of wake-airfoil interaction noise by the use of actuators on the airfoil surfaces near the leading edge. The objective is to eliminate the sound radiation by canceling the wake-airfoil noise near its source (the leading edge). Actuators are mounted on the upper and lower surfaces of the airfoil and driven out of phase to match the antisymmetric nature of the wake-airfoil noise field. The analysis is based on linearization about a two-dimensional compressible subsonic mean flow past a semi-infinite flat-plate airfoil. Asymptotic solutions are deve

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Wang, Pai. "Discoveries in Phononic Crystals and Acoustic Metamaterials." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:26718707.

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Phononic crystals and acoustic metamaterials are heterogeneous materials that enable manipulation of elastic waves. An important characteristic of these heterogeneous systems is their ability to tailor the propagation of elastic waves due to the existence of band gaps -- frequency ranges of strong wave attenuation. In this Thesis, I report discoveries of three new types of band gaps: i) Band gaps induced by geometric frustration in periodic acoustic channel networks; ii) Band gap induced by high connectivity in periodic beam lattices; and iii) Topological band gaps in gyroscopic phononic cryst

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Miller, Thomas Edward S. M. Massachusetts Institute of Technology. "Real time bottom reverberation simulation in deep and shallow ocean environments." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/103576.

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Thesis: S.M., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 77).<br>Due to the costs involved and time required to perform experiments at sea, it is important to provide accurate simulations of the ocean environment. Using the ray tracing code, BELLHOP, the Mission Oriented Operating Suite (MOOS), methods outlined by the Naval Research Laboratory (NRL) for bottom reverber

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Stewart, Kevin Matthew. "MECHANICAL SIMULATION OF ARTICULAR CARTILAGE BASED ON EXPERIMENTAL RESULTS." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/93.

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Recently, a constituent based cartilage growth finite element model (CGFEM) was developed in order to predict articular cartilage (AC) biomechanical properties before and after growth. Previous research has noted limitations in the CGFEM such as model convergence with growth periods greater than 12 days. The main aims of this work were to address these limitations through (1) implementation of an exact material Jacobian matrix definition using the Jaumann-Kirchhoff (J-K) method and (2) quantification of elastic material parameters based upon research findings of the Cal Poly Cartilage Biomec

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Hong, Tayo Steve. "Analysis and fabrication of paraboloidal CFRP sandwich mirrors." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185587.

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The low areal weight requirements of telescopes in aerospace applications has driven the study on composite mirrors for several years. For example, the primary parabolic mirror in a balloon-borne, Cassegrain telescope required an optical quality better than 30 microns in figure RMS error. A parametric study on composite sandwich mirrors was conducted by using finite element analysis as well as optical analysis. The factors covered the cell sizes, core materials, core thicknesses, face layups, and support configurations. Based on theoretical calculations, many high quality spherical composite s

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Manatakos, Kyriakos 1960. "Behaviour and design of reinforced concrete core-slab-frame structures." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42088.

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This dissertation examines the response and design of reinforced concrete core-slab-frame structures subjected to monotonically increasing earthquake and gravity loads throughout the entire load range until failure, presenting findings from three separate studies by Manatakos and Mirza (1995) continuing the M. Eng. thesis research by Manatakos (1989). A typical building is selected consisting of a central core substructure composed of elevator, staircase and infilled slab cores, with coupling and lintel beams, and surrounding slabs joining to a frame substructure composed of slab-band girders,

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Marth, Stefan. "Material Characterization for Modelling of Sheet Metal Deformation and Failure." Licentiate thesis, Luleå tekniska universitet, Material- och solidmekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62477.

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Weight reduction is one possibility to reduce fuel consumption and emission of transportation vehicles. Sheet metals are often used in automotive and aerospace applications and therefore the weight reduction achieved by reducing the sheet metals thickness is an important contribution to weight reduction. Increasing the strength of sheet metal materials gives the opportunity to reduce the total weight while maintaining safety. To prove a maintained safety for parts with a decreased weight Finite Element (FE) simulations are commonly used. This leads to a high demand on the simulation precision

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Chevalier, Mattias. "Feedback and adjoint based control of boundary layer flows." Doctoral thesis, Stockholm : Department of Mechanics, Royal Institute of Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-65.

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Leonard, Kevin Raymond. "Ultrasonic guided wave tomography of pipes: A development of new techniques for the nondestructive evaluation of cylindrical geometries and guided wave multi-mode analysis." W&M ScholarWorks, 2004. https://scholarworks.wm.edu/etd/1539616737.

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This dissertation concentrates on the development of two new tomographic techniques that enable wide-area inspection of pipe-like structures. By envisioning a pipe as a plate wrapped around upon itself, the previous Lamb Wave Tomography (LWT) techniques are adapted to cylindrical structures. Helical Ultrasound Tomography (HUT) uses Lamb-like guided wave modes transmitted and received by two circumferential arrays in a single crosshole geometry. Meridional Ultrasound Tomography (MUT) creates the same crosshole geometry with a linear array of transducers along the axis of the cylinder. However,

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Jones, Katie Renae. "Measurements and dynamics of multiple scale bedforms in tidally energetic environments." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118708.

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Thesis: S.M., Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 97-103).<br>The presence of superimposed bedforms, where smaller bedforms exist on larger bedforms, is ubiquitous to energetic tidal environments. Due to their wide range in scale, it is difficult to simultaneously observe these features over tidal timescales. This thesis examines the morphological response of s

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Holmqvist, Claes. "Mechanical modelling of blade forming and drainage of flocculated suspensions." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141.

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Gieleghem, Ryan Thomas. "Robust acoustic signal detection and synchronization in a time varying ocean environment." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78186.

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Thesis (S.M.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 99-100).<br>Signal detection and synchronization in the time varying ocean environment is a difficult endeavor. The current common methods include using a linear frequency modulated chirped pulse or maximal length sequence as a detection pulse, then match filtering to that signal. In higher signal to noise ratio (SNR)

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