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Dissertations / Theses on the topic 'Computational mechanics. Numerical analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

陳彤{272b21} and Tong Chen. "Numerical computations on free-surface flow." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31238245.

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2

Chen, Tong. "Numerical computations on free-surface flow /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21020292.

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3

北, 英輔, Eisuke KITA, 洋一池田, Yoichi IKEDA, 紀生神谷 та Norio KAMIYA. "エレメントフリーTrefftz法による非線形Poisson方程式の感度解析". 日本機械学会, 2004. http://hdl.handle.net/2237/9235.

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4

Qirezi, Fatmir. "Discrete schemes for thermoviscoelasticity with thermorheologically-simple nonlinear coupling." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/13456.

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5

畔上, 秀幸, Hideyuki Azegami, 英次片峯 та ін. "成長ひずみ法による円筒コイルばねの素線断面形状最適化解析". 日本機械学会, 1990. http://hdl.handle.net/2237/7263.

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6

Basaran, Mustafa Bulent. "Computational Analysis Of Advanced Composite Armor Systems." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608858/index.pdf.

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Achieving light weight armor design has become an important engineering challenge in the last three decades. As weapons becoming highly sophisticated, so does the ammunition, potential targets have to be well protected against such threats. In order to provide mobility, light and effective armor protection materials should be used. In this thesis, numerical simulation of the silicon carbide armor backed by KevlarTM composite and orthogonally impacted by 7.62mm armor piercing (AP) projectile at an initial velocity of 850 m/s is analyzed by using AUTODYN hydrocode. As a first step, ceramic mate

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7

畔上, 秀幸, Hideyuki Azegami, 康弘須貝, Yasuhiro Sugai, 昌利下田 та Masatoshi Shimoda. "座屈に対する形状最適化". 日本機械学会, 2000. http://hdl.handle.net/2237/7234.

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8

Adhikari, Param C. "Computational Analysis of Mixing in Microchannels." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1370799440.

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9

Ellis, Truman Everett. "High Order Finite Elements for Lagrangian Computational Fluid Dynamics." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/282.

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A general finite element method is presented to solve the Euler equations in a Lagrangian reference frame. This FEM framework allows for separate arbitrarily high order representation of kinematic and thermodynamic variables. An accompanying hydrodynamics code written in Matlab is presented as a test-bed to experiment with various basis function choices. A wide range of basis function pairs are postulated and a few choices are developed further, including the bi-quadratic Q2-Q1d and Q2-Q2d elements. These are compared with a corresponding pair of low order bi-linear elements, traditional Q1-Q0

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10

Azegami, Hideyuki. "A Proposal of a Shape-Optimization Method Using a Constitutive Equation of Growth (In the Case of a Static Elastic Body)." 日本機械学会, 1990. http://hdl.handle.net/2237/7275.

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11

Augustyn, Ockert Philippus Hermanus. "Experimental and numerical analysis of axial flow fans." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85720.

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Thesis (MScEng)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The majority of power stations in South Africa are located in coal rich, but arid regions where wet-cooled condenser systems are not feasible from an environmental and economic perspective. Consequently the focus on power generation cooling has shifted towards dry-cooling systems using air-cooled steam condensers (ACSC). The steam passing through the ACSC units is cooled by an air-draught, mechanically induced by large diameter axial flow fans. Consequently the effectiveness of the cooling is impacted by the performance

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12

Pervaiz, Salman. "Numerical and Experimental Investigations of the Machinability of Ti6AI4V : Energy Efficiency and Sustainable Cooling/ Lubrication Strategies." Doctoral thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173594.

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Titanium alloys are widely utilized in the aerospace, biomedical,marine, petro-chemical and other demanding industries due to theirdurability, high fatigue resistance and ability to sustain elevateoperating temperature. As titanium alloys are difficult to machine, dueto which machining of these alloys ends up with higher environmentalburden. The industry is now embracing the sustainable philosophy inorder to reduce their carbon footprint. This means that the bestsustainable practices have to be used in machining of titanium alloys aswell as in an effort to reduce the carbon footprint and green

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13

Blanch, Ojea Roland. "Numerical and experimental analyses of single and two-phase microfluidic flows with implications in microreactors." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/63824.

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Aquesta tesi centra els seus esforços en l'àmbit de la microfluídica, un camp relativament recent dins de la Mecànica de Fluids, amb un futur prometedor i amb un ritme d'investigació intens en les seves diferents especialitzacions. En aquest sentit, la tesi presenta dos aportacions científiques principals. Primer, aporta una eina numèrica d'elaboració pròpia per realitzar simulacions de fluxos reactius en microcanals. Eina que s'aplica satisfactòriament a la identificació dels principals processos de transport involucrats en la oxidació parcial del metà per a produir gas de síntesi, i a l'est

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14

Choi, Jiwoong. "Multiscale numerical analysis of airflow in CT-based subject specific breathing human lungs." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/2685.

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An imaging-based computational framework for simulation of airflow in subject specific breathing human lungs is established. The three-dimensional (3D) airways of up to 9 generations and lobes are segmented and reconstructed from computed tomography (CT) images. Beyond the CT-resolved 3D airways, a volume filling method is applied to generate the one-dimensional (1D) conducting airway tree that bridges the central airway with the lung parenchyma. Through 3D-1D airway coupling, a novel image-registration-based boundary condition (BC) is proposed to derive physiologically-consistent regional ven

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15

Ingraham, Daniel. "External Verification Analysis: A Code-Independent Approach to Verifying Unsteady Partial Differential Equation Solvers." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1430491745.

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16

AZEGAMI, Hideyuki, and Zhi Chang WU. "Domain Optimization Analysis in Linear Elastic Problems (Approach Using Traction Method)." 日本機械学会, 1996. http://hdl.handle.net/2237/12156.

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17

片峯, 英次, Eiji Katamine, 秀幸畔上 та Hideyuki Azegami. "ポテンシャル流れ場の領域最適化解析". 日本機械学会, 1995. http://hdl.handle.net/2237/7253.

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18

Naugle, Cameron R. "Rotordynamic Analysis of Theoretical Models and Experimental Systems." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1867.

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This thesis is intended to provide fundamental information for the construction and analysis of rotordynamic theoretical models, and their comparison the experimental systems. Finite Element Method (FEM) is used to construct models using Timoshenko beam elements with viscous and hysteretic internal damping. Eigenvalues and eigenvectors of state space equations are used to perform stability analysis, produce critical speed maps, and visualize mode shapes. Frequency domain analysis of theoretical models is used to provide Bode diagrams and in experimental data full spectrum cascade plots. Experi

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19

Kupiainen, Marco. "Compressible Turbulent Flows : LES and Embedded Boundary Methods." Doctoral thesis, KTH, Numerisk analys, NA, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10090.

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20

Celestin, Carey Jr. "Computational Fluid Dynamics Applied to the Analysis of Blood Flow Through Central Aortic to Pulmonary Artery Shunts." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1972.

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This research utilizes CFD to analyze blood flow through pathways representative of central shunts, commonly used as part of the Fontan procedure to treat cyanotic heart disease. In the first part of this research, a parametric study of steady, Newtonian blood flow through parabolic pathways was performed to demonstrate the effect that flow pathway curvature has on wall shear stress distribution and flow energy losses. In the second part, blood flow through two shunts obtained via biplane angiograms is simulated. Pressure boundary conditions were obtained via catheterization. Results showe

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21

Dahl, Anna Caroline E. "Membrane protein mechanotransduction : computational studies and analytics development." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:67798647-8ed5-46e0-bde9-c71235fe70ba.

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Membrane protein mechanotransduction is the altered function of an integral membrane protein in response to mechanical force. Such mechanosensors are found in all kingdoms of life, and increasing numbers of membrane proteins have been found to exhibit mechanosensitivity. How they mechanotransduce is an active research area and the topic of this thesis. The methodology employed is classical molecular dynamics (MD) simulations. MD systems are complex, and two programs were developed to reduce this apparent complexity in terms of both visual abstraction and statistical analysis. Bendix detects an

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22

畔上, 秀幸, Hideyuki Azegami, 志強呉 та Zhi Chang Wu. "線形弾性問題における領域最適化解析（力法によるアプローチ）". 日本機械学会, 1994. http://hdl.handle.net/2237/7239.

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23

畔上, 秀幸, та Hideyuki Azegami. "領域最適化問題の一解法". 日本機械学会, 1994. http://hdl.handle.net/2237/7238.

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24

Davuluri, Raghava Sai Chaitanya. "Modeling of spallation phenomenon in an arc-jet environment." UKnowledge, 2015. https://uknowledge.uky.edu/me_etds/63.

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Space vehicles, while entering the planetary atmosphere, experience high loads of heat. Ablative materials are commonly used for a thermal protection system, which undergo mass removal mechanisms to counter the heat rates. Spallation is one of the ablative processes, which is characterized by the ejection of solid particles from the material into the flow. Numerical codes that are used in designing the heat shields ignore this phenomenon. Hence, to evaluate the effectiveness of spallation phenomenon, a numerical model is developed to compute the dynamics and chemistry of the particles. The cod

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25

Giardina, Ronald J. Jr. "Stress Analysis of Ramberg-Osgood and Hollomon 1-D Axial Rods." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1629.

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In this paper we present novel analytic and finite element solutions to 1-D straight rods made of Ramberg-Osgood and Hollomon type materials. These material models are studied because they are a more accurate representation of the material properties of certain metals used often in manufacturing than the simpler composite linear types of stress/strain models. Here, various types of loads are considered and solutions are compared against some linear models. It is shown that the nonlinear models do have manageable solutions, which produce important differences in the results - attributes which s

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26

Ramanathan, Arun Kumar Kumar. "Dynamic response of a shipping container rack and suspended automotive parts under random excitation: Experimental, Computational and Analytical Studies." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492093294208549.

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27

Rosescu, Justin J. "A Study of the Design of Adaptive Camber Winglets." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2177.

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A numerical study was conducted to determine the effect of changing the camber of a winglet on the efficiency of a wing in two distinct flight conditions. Camber was altered via a simple plain flap deflection in the winglet, which produced a constant camber change over the winglet span. Hinge points were located at 20%, 50% and 80% of the chord and the trailing edge was deflected between -5° and +5°. Analysis was performed using a combination of three-dimensional vortex lattice method and two-dimensional panel method to obtain aerodynamic forces for the entire wing, based on different winglet

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28

Schmidt, Martin-Pierre. "Computational generation and optimization of mechanical structures On structural topology optimization using graded porosity control Structural topology optimization with smoothly varying fiber orientations." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMIR01.

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Cette thèse étudie et développe des méthodes de modélisation mathématique, analyse et optimisation numérique appliquées à la génération d’objets 3D. Les approches proposées sont utilisées pour la génération de structures lattices et de structure continue par optimisation topologique<br>This thesis studies and develops methods for mathematical modeling, numerical analysis and optimization applied to the generation of 3D objects. The proposed approaches are used to generate lattice structures and continuum structures with topology optimization

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29

Abbasi, Baharanchi Ahmadreza. "Development of a Two-Fluid Drag Law for Clustered Particles Using Direct Numerical Simulation and Validation through Experiments." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2489.

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This dissertation focused on development and utilization of numerical and experimental approaches to improve the CFD modeling of fluidization flow of cohesive micron size particles. The specific objectives of this research were: (1) Developing a cluster prediction mechanism applicable to Two-Fluid Modeling (TFM) of gas-solid systems (2) Developing more accurate drag models for Two-Fluid Modeling (TFM) of gas-solid fluidization flow with the presence of cohesive interparticle forces (3) using the developed model to explore the improvement of accuracy of TFM in simulation of fluidization flow of

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30

Davies, Jason W. "Analysis of Viscous Drag Reduction and Thermal Transport Effects for Microengineered Ultrahydrophobic Surfaces." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1205.pdf.

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31

Shu, Yupeng. "Numerical Solutions of Generalized Burgers' Equations for Some Incompressible Non-Newtonian Fluids." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2051.

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The author presents some generalized Burgers' equations for incompressible and isothermal flow of viscous non-Newtonian fluids based on the Cross model, the Carreau model, and the Power-Law model and some simple assumptions on the flows. The author numerically solves the traveling wave equations for the Cross model, the Carreau model, the Power-Law model by using industrial data. The author proves existence and uniqueness of solutions to the traveling wave equations of each of the three models. The author also provides numerical estimates of the shock thickness as well as maximum strain $\vare

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32

LIRA, WILLIAM WAGNER MATOS. "AN INTEGRATED SYSTEM FOR NUMERICAL SIMULATIONS IN COMPUTATIONAL MECHANICS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1471@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho dá continuidade ao desenvolvimento de uma metodologia para extensão e configuração de aplicações gráficas interativas utilizadas em simulações baseadas no método dos elementos finitos (MEF). Novos atributos requisitados pelos módulos de análise podem ser facilmente incluídos nos pré- e pós-processadores. Os atributos são definidos, através de uma linguagem de extensão interpretada relativamente simples, em um arquivo de configuração. A configuração e extensão é feita a partir da criação de classes e métod

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33

Giardina, Ronald J. Jr. "On The Ramberg-Osgood Stress-Strain Model And Large Deformations of Cantilever Beams." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2377.

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In this thesis the Ramberg-Osgood nonlinear model for describing the behavior of many diﬀerent materials is investigated. A brief overview of the model as it is currently used in the literature is undertaken and several misunderstandings and possible pitfalls in its application is pointed out, especially as it pertains to more recent approaches to ﬁnding solutions involving the model. There is an investigation of the displacement of a cantilever beam under a combined loading consisting of a distributed load across the entire length of the beam and a point load at its end and new solutions to t

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34

Bharthipudi, Saraswati. "Comparison of numerical result checking mechanisms for FFT computations under faults." Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-12172003-171912/unrestricted/Saraswati%5FBharthipudi%5F2002%5F05.pdf.

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Thesis (M.S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>Dr. Feodor Vainstein, Committee Member; Dr. Doug Blough, Committee Chair; Dr. David Schimmel, Committee Member. Includes bibliographical references (leaves 71-75).

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35

Bharthipudi, Saraswati. "Comparison of numerical result checking mechanisms for FFT computations under faults." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5126.

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This thesis studies and compares existing Numerical Result checking algorithms for FFT computations under faults. In order to simulate faulty conditions, a fault injection tool is implemented. The fault injection tool is designed so as to be as non-intrusive to the application as possible. Faults are injected into memory in the form of bit flips in the data elements of the application. The performance of the three result checking algorithms under these conditions is studied and compared. Faults are injected at all the stages of the FFT computation by flipping each of the 64-bits in the double

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36

Ratnanather, John Tilak. "Numerical analysis of turbulent flow." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236094.

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37

TIAN, BINYU. "COMPUTATIONAL AEROELASTIC ANALYSIS OF AIRCRAFT WINGS INCLUDING GEOMETRY NONLINEARITY." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070398084.

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38

Dawes, A. S. "Natural co-ordinates and high speed flows : a numerical method for reactive gases." Thesis, Cranfield University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333184.

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39

Barber, Robert William. "Numerical modelling of jet-forced circulation in reservoirs using boundary-fitted coordinate systems." Thesis, University of Salford, 1990. http://usir.salford.ac.uk/26561/.

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Throughout the past decade, interest has grown in the use of boundary-fitted coordinate systems in many areas of computational fluid dynamics. The boundary-fitted technique provides an exact method of implementing finite-difference numerical schemes in curved flow geometries and offers an alternative solution procedure to the finite-element method. The unavoidable large bandwidth of the global stiffness matrix, employed in finite-element algorithms, means that they are computationally less efficient than corresponding finite-difference schemes. As a consequence, the boundary-fitted method offe

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40

Erhan, Inci. "Quantum Mechanical Computation Of Billiard Systems With Arbitrary Shapes." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1104082/index.pdf.

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An expansion method for the stationary Schrodinger equation of a particle moving freely in an arbitrary axisymmeric three dimensional region defined by an analytic function is introduced. The region is transformed into the unit ball by means of coordinate substitution. As a result the Schrodinger equation is considerably changed. The wavefunction is expanded into a series of spherical harmonics, thus, reducing the transformed partial differential equation to an infinite system of coupled ordinary differential equations. A Fourier-Bessel expansion of the solution vector in terms of Bessel funct

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41

Walls, Kenneth Cline. "Multi-material contact for computational structural mechanics." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/walls.pdf.

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42

Öhrman, Jakob. "Evaluation of a CFD method for estimating aerodynamic loads on external stores on JAS 39 Gripen." Thesis, Umeå universitet, Institutionen för fysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-44380.

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Loads determination for external stores on fighter aircraft is an important task for manufacturers in ensuring the safe operation of their aircraft. Due to the large number of possible store combinations, wind tunnel tests – the primary approach to obtaining loads data – cannot be performed for all configurations. Instead, supplementary techniques to estimating loads are necessary. One approach is to use information from another store and adapt it, using so-called scaling methods, to the non-tested store. In this thesis, a scaling method combining the results of computational fluid dynamics (C

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43

胡思來 and See-loi Wu. "Numerical analysis of dynamic crack propagation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208459.

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Wu, See-loi. "Numerical analysis of dynamic crack propagation /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12354569.

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45

Jang, Jae Won. "Characterization of live modeling performance boundaries for computational structural mechanics /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/10178.

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46

Kakarla, Kishan. "Numerical analysis of seepage in earth slopes." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4078.

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Thesis (M.S.)--West Virginia University, 2005.<br>Title from document title page. Document formatted into pages; contains x, 150 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 72-73).

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47

Johansson-Näslund, Markus. "Numerical analysis of paperboard delamination using cohesive elements." Thesis, KTH, Hållfasthetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277779.

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A new test method for measuring the shear strength associated with mode III delamination of paperboard is studied with the purpose of reducing the size of the test configuration. The method, which uses a split cantilever beam (SCB) specimen, measures the shear strength indirectly through the fracture resistance. The methodology is based on the double cantilever beam (DCB) specimen, used for measuring the normal delamination strength of paperboard. The study is based on finite element analyses, where cohesive elements are implemented for predicting the fracture response. An experimental evaluat

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48

Deligiannis, Christos. "Two-dimensional vortex methods : analysis, development and applications." Thesis, University of Brighton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273864.

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Alam, Syed Yasir. "EXPERIMENTAL STUDY AND NUMERICAL ANALYSIS OF CRACK OPENING IN CONCRETE." Phd thesis, Ecole centrale de nantes - ECN, 2011. http://tel.archives-ouvertes.fr/tel-00669877.

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Il est communément admis l'existence d'un effet d'échelle sur les résistances nominales des matériaux quasi-fragiles tels que les matériaux cimentaires. Cet effet doit être pris en compte dans le dimensionnement vis-à-vis du comportement ultime des structures en béton afin de limiter les dommages et les ouvertures de fissures. Celles-ci sont de plus en plus utilisées pour étudier le comportement du béton et caractériser la durabilité des structures. Différentes théories existent dans la littérature pour décrire l'effet d'échelle. Parmi celles-ci on trouve la théorie déterministe de Bazant où l

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Kano, Patrick Oliver. "Development and Analysis of High Accuracy Numerical Methods for Computational Optics." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1297%5F1%5Fm.pdf&type=application/pdf.

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