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Rozprawy doktorskie na temat „Functionally Graded Design”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Soncco, K., X. Jorge, and R. A. Arciniega. "Postbuckling Analysis of Functionally Graded Beams." Institute of Physics Publishing, 2019. http://hdl.handle.net/10757/625602.

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This paper studies the geometrically non-linear bending behavior of functionally graded beams subjected to buckling loads using the finite element method. The computational model is based on an improved first-order shear deformation theory for beams with five independent variables. The abstract finite element formulation is derived by means of the principle of virtual work. High-order nodal-spectral interpolation functions were utilized to approximate the field variables which minimizes the locking problem. The incremental/iterative solution technique of Newton's type is implemented to solve t

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Liu, Hongye 1970. "Algorithms for design and interrogation of functionally graded material solids." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9044.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.<br>Includes bibliographical references (leaves 109-112).<br>A Functionally Gradient Material (FGM) part is a 3D solid object that has varied local material composition that is defined by a specifically designed function. Recently, research has been performed at MIT in order to exploit the potential of creating FGM parts using a modern fabrication process, 3D Printing, that has the capability of controlling composition to th

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Lyon, Mark Edward. "Incorporating Functionally Graded Materials and Precipitation Hardening into Microstructure Sensitive Design." Diss., CLICK HERE for online access, 2003. http://contentdm.lib.byu.edu/ETD/image/etd260.pdf.

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Grigoriadis, Kostas. "Computational and conceptual blends : the epistemology of designing with functionally graded materials." Thesis, Royal College of Art, 2018. http://researchonline.rca.ac.uk/3401/.

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Operating within the landscape of new materialism and considering recent advances in the field of additive manufacturing, the thesis is proposing a novel method of designing with a new type of material that is known as functionally graded. Two of the additive manufacturing advances that are considered of radical importance and at the same time are central to the research have to do with the progressively increasing scales of the output of 3D printing, as well as with the expanding palette of materials that can now be utilised in the process. Regarding the latter, there are already various indu

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Goel, Archak. "Design of Functionally Graded BCC Type Lattice Structures Using B-spline Surfaces for Additive Manufacturing." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552398559313737.

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Velo, Ani P. "Optimal Design of Gradient Fields with Applications to Electrostatics." Digital WPI, 2000. https://digitalcommons.wpi.edu/etd-dissertations/311.

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"In this work we consider an optimal design problem formulated on a two dimensional domain filled with two isotropic dielectric materials. The objective is to find a design that supports an electric field which is as close as possible to a target field, under a constraint on the amount of the better dielectric. In the case of a zero target field, the practical purpose of this problem is to avoid the so called dielectric breakdown of the material caused due to a relatively large electric field. In general, material layout problems of this type fail to have an optimal configuration of the two ma

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Short, Michael Philip. "The design of a functionally graded composite for service in high temperature lead and lead-bismuth cooled nuclear reactors." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/76567.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 275-291).<br>A material that resists lead-bismuth eutectic (LBE) attack and retains its strength at 700°C would be an enabling technology for LBE-cooled reactors. No single alloy currently exists that can economically meet the required performance criteria of high strength and corrosion resistance. A Functionally Graded Composite (FGC) was created with layers engineered to perform these functions. F91 was cho

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Fang, Jianguang. "Application of Surrogate Based Optimisation in the Design of Automotive Body Structures." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15376.

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The rapid development of automotive industry requires manufacturers to continuously reduce the development cost and time and to enhance the product quality. Thus, modern automotive design pays more attention to using CAE analysis based optimisation techniques to drive the entire design flow. This thesis focuses on the optimisation design to improve the automotive crashworthiness and fatigue performances, aiming to enhance the optimisation efficiency, accuracy, reliability, and robustness etc. The detailed contents are as follows: (1) To excavate the potential of crash energy absorbers, the con

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Tedia, Saish. "Design, Analysis and Fabrication of Complex Structures using Voxel-based modeling for Additive Manufacturing." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/89524.

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A key advantage of Additive Manufacturing (AM) is the opportunity to design and fabricate complex structures that cannot be made via traditional means. However, this potential is significantly constrained by the use of a facet-based geometry representation (e.g., the STL and the AMF file formats); which do not contain any volumetric information and often, designing/slicing/printing complex geometries exceeds the computational power available to the designer and the AM system itself. To enable efficient design and fabrication of complex/multi-material complex structures, several algorithms are

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Gilmore, Paul. "Regulation of Oxygen Transport in Potassium-Oxygen Batteries Using Conducting Polymers." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555588196317105.

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Dias, Cleber Marcos Ribeiro. "Fibrocimentos com gradação funcional." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-31052011-164232/.

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O presente estudo mostra que o conceito de materiais com gradação funcional (MGF) pode ser aplicado no desenvolvimento de componentes de fibrocimento mais econômicos e com desempenho mecânico melhorado. Primeiramente, este trabalho estabelece o conceito de fibrocimento com gradação funcional. Depois, modelam-se, em elementos finitos, as tensões em telhas onduladas sob flexão estática e cargas de vento e mostra-se que, para esses tipos de carregamento, regiões específicas das telhas são submetidas a tensões de baixa intensidade justificando a aplicação do conceito de MGF para a otimização da di

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Carter, Justin B. "Vibration and Aeroelastic Prediction of Multi-Material Structures based on 3D-Printed Viscoelastic Polymers." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1627048967306654.

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SAU, CARLO. "Dataflow based design suite for the development and management of multi-functional reconfigurable systems." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266751.

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Embedded systems development constitutes an extremely challenging scenario for the designers since several constraints have to be meet at the same time. Flexibil- ity, performance and power efficiency are typically colliding requirements that are hardly addressed together. Reconfigurable systems provide a valuable alternative to common architectures to challenge contemporarily all those issues. Such a kind of systems, and in particular the coarse grained ones, exhibit a certain level of flexi- bility while guaranteeing strong performance. However they suffer of an increased design and manageme

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Diaz, Nava Mario. "Proposition d'une méthodologie de conception de circuits intégrés de communication : réalisation d'un communicateur pour le réseau local FIP." Phd thesis, Grenoble INPG, 1986. http://tel.archives-ouvertes.fr/tel-00320454.

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FIP=Factory Instrumentation Protocol. On réalise un circuit intégré de communication pour le réseau FIP, projet national de communication entre automates réflexes, capteurs et actionneurs. Le circuit intégré est spécifié pour permettre soit la connexion de capteurs simples, soit la connexion de capteurs intelligents ou des automates de réseau. La conception de ce circuit intégré «à la demande» résulte d'une méthodologie originale. Cette méthodologie est orientée vers la conception de circuits VLSI de communication à partir d'une bibliothèque d'opérateurs flexibles, d'une part pour réduire le t

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Sahoo, Deepak Kumar. "Fabrication of Functionally Graded Material (FGM) Set-Up." Thesis, 2015. http://ethesis.nitrkl.ac.in/7697/1/2015_FABRICATION_Sahoo.pdf.

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Functionally graded materials (FGMs) are advanced composites with graded properties that are novel concepts in the structural design of materials and have extensive applications in the aerospace engineering, aircrafts and automotive industry. FGMs with the continuous variation of microstructures and properties are expected to have the reduction of residual and thermal stresses. In case of metal-ceramic FGMs advancement over heat and corrosion resistance of ceramics and mechanical strength of metals in such applications as thermal or chemical barriers. FGMs can also be designed to take.an impro

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Chaudhari, Rohit. "Vibration Analysis of Tapered Pre-Twisted Functionally Graded Rotating Blade." Thesis, 2018. http://ethesis.nitrkl.ac.in/9602/1/2018_MT_216ME1355_RChaudhari_Vibration.pdf.

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Structural dynamic analysis of pre-twisted blades is one of the classical problems dealt earlier by several researchers. In present study a blade made up of functionally graded (FG)metal-ceramic composite material having a pre-twist is considered. Free vibration analysis of rotating pre-twisted blades is conducted and all the modal parameters are determined as a function of pre-twist at different operating speeds. Approach followed is based on Rayleigh-Ritz’s technique for decomposing the equation of motion of rotating blade into generalized coordinates. The three dimensi

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Patil, Dinesh. "Thermo-Mechanical Stress Analysis of Functionally Graded Tapered Shaft System." Thesis, 2015. http://ethesis.nitrkl.ac.in/7215/1/Thermo_Patil_2015.pdf.

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Present work deals with the study of stresses developed in tapered functionally graded (FG) shaft system under both thermal and mechanical environment for three nodded beam element by using Timoshenko beam theory. The temperature distribution in radial direction is assumed based on one dimensional steady state temperature field by Fourier heat conduction equation without considering heat generation. Temperature dependent material properties are varied along the radial direction using power law gradation. Tapered FG shaft consists of rigid disk attached at its centre and shaft is mounted on two

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Koteswararao, D. "Dynamic Analysis and Active Control of Functionally Graded Rotor Shaft System." Thesis, 2020. http://ethesis.nitrkl.ac.in/10107/1/2020_PhD_511ME113_KRaoD_Dynamic.pdf.

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Functionally graded (FG) shaft finds applications in gas turbines and aircraft jet engine rotors to withstand the thermal and mechanical loads. The present work deals with the finite element modelling, and dynamic analysis and active control of different kinds of FG rotating shaft systems considering temperature-independent (TID) and temperature-dependent (TD) material properties. Aluminum oxide (Al2O3), stainless steel (SUS304), and titanium alloy (Ti-6Al-4V) are considered as the FG shaft materials. One dimensional (1D) and two dimensional (2D) distributions of material properties of the FG

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Tiwari, Pawan Kumar. "Vibration Analysis of CNT Based Functionally Graded Shell Structures Under Impact Loading." Thesis, 2016. http://ethesis.nitrkl.ac.in/9291/1/2016_MT_PKTiwari.pdf.

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The present study deals with the vibration analysis of functionally graded (FG) shell structures reinforced with carbon nanotube (CNTS) under impact loading. A mathematical model is formulated based on the Mori-Tanaka Method for the material properties of CNTS based FG composites shell structure. The different volume fractions of CNTS and different type of FG gradation such as UD, FG-X, FG-O, and FG-V are considered. The gradation of CNTS is along the thickness direction of the FG composites shell structure using power law of gradation. In this study, the FG composite is forming by incorporati

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Shin-JinHo and 何欣瑾. "Design of Press-fit for Double-layered Functionally Graded Hollow Disks." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/27852272685665181344.

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碩士<br>國立成功大學<br>機械工程學系<br>103<br>The present study designs double-layered functionally graded hollow disks in press-fit problem. Young’s modulus, density and coefficient of expansion are assumed as power functions along the radial direction, while Poisson’s ratio remains constant. According to the infinitesimal theory of elasticity, the exact solutions of stress in single-layered functionally graded hollow disks under (1) internal and external pressures; (2) rotation; (3) uniform temperature are derived. Furthermore, the same conditions are also discussed in double-layered functionally graded

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Wu, Chi-hao, and 吳啟豪. "The Design and Fabrication of Stealth-oriented Broadband Functionally Graded Absorbers." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/33778759469162019615.

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碩士<br>逢甲大學<br>航太與系統工程學系<br>103<br>In this study, a functionally graded material (FGM) and a radar absorbing material (RAM) are integrated to fabricate a functionally graded absorber. A coaxial transmission/reflection method is used to obtain the complex permittivity and permeability of composite absorbers (flake-shaped FeNiMo permalloy, spherical-like carbonyl iron powder and flake-shaped carbonyl iron powders) in the range of 2~18 GHz to establish a microwave absorber database with different weight percentage of absorbent fillers. Using the established database, the functionally graded absorb

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obbineni, mallikarjanareddy. "Dynamic stability analysis of a sandwich beam with functionally graded material constraining layer." Thesis, 2013. http://ethesis.nitrkl.ac.in/4882/1/211ME1159.pdf.

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The present work aims to study the dynamic stability of a three layer sandwich beam with viscoelastic core and functionally graded material constraining layer. Sandwich beam is modelled as a line element having two nodes of each having four degrees of freedom. Finite element method is used to model the beam. Variation of properties of functionally graded material is taken according to a simple power law. The Hsu’s procedure proposed by Saito and Otomi has been used to determine boundaries of stable and unstable regions of the sandwich beam. The effect of various system parameters such as core

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Satapathy, Sourav Bikash. "Development of an Experimental Set-Up for Producing Metal and Ceramic Functionally Graded Materials." Thesis, 2015. http://ethesis.nitrkl.ac.in/7665/1/2015_BT_Development_Sourav_Vikash_Saptapathy.pdf.

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Functionally graded materials are a class of advanced composites with graded properties that bring a new concept in material design and are widely used in the aerospace and automotive industry. These materials have continuously varying microstructure and properties. They are known to have little residual and thermal stress. This concept imparts improved adhesive bonding strength between metals and ceramics. Multifunctional metal-ceramic structures are well suited for applications where toughness and hardness are two essential requirements. Metal-ceramic functionally graded materials can also b

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Inamdar, Prasad Kiran. "Free Vibration and Thermal Analysis of Randomly Oriented Carbon Nano Tube Based Functionally Graded Beam." Thesis, 2013. http://ethesis.nitrkl.ac.in/4986/1/211ME1157.pdf.

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Present work deals with the free vibration and thermal analysis of CNT based functionally graded beam using three dimensional Timoshenko beam theory. It has been assumed that the material properties of CNT based FG beam varies only along the thickness and evaluated by rule of mixture. Finite element method is used to solve governing equation with the exact shape functions. Natural frequencies are calculated and validated with available literature. The effect of variation of CNT volume fraction and boundary conditions on the natural frequency of the beam has also been studied. Further work deal

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Tsukamoto, Hideaki. "Theoretical study on toughening and design against fracture of functionally graded thermal barrier coatings." Thesis, 2008. http://hdl.handle.net/2440/101470.

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Functionally graded thermal barrier coatings (FG TBCs) are advanced multi-phase composites that are engineered to have a smooth spatial gradation of material constituents, which are normally ceramics and metal. The smooth gradation results in the reduction of thermal stresses, minimization or elimination of stress concentrations and singularities at interface corners, and increase in bonding strength. FG TBCs are able to survive very high temperatures and temperature gradients, which makes them very promising in many current and future applications including nuclear reactors, engines, turbines

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Gayen, Debabrata. "Finite element based vibration and stability analysis of functionally graded rotating shaft system under thermal environment." Thesis, 2013. http://ethesis.nitrkl.ac.in/4972/1/211ME1156.pdf.

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The present work deals with the study of vibration and stability analyses of functionally graded spinning shaft system under thermal environment using three nodded beam element based on TBT. Temperature field is assumed to be a uniform distribution over the shaft surface and varied in radial direction only. Material properties are assumed to be temperature dependent and graded in radial direction according to power law gradation. In the present analysis, the mixture of Aluminum Oxide and Stainless Steel is considered as FG material where metal contain is decreasing towards the outer diameter o

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