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Dissertations / Theses on the topic 'Functionally Graded'

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Published: 4 June 2021

Last updated: 10 March 2023

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1

Apetre, Nicoleta Alina. "Sandwich panels with functionally graded core." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012061.

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2

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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3

Heidari, Maryam. "3D modelling of functionally graded coatings." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=215382.

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The purpose of this study is to investigate the behaviour of functionally graded materials in the coating design through analytical and numerical work. Functionally graded materials are advanced composite materials formed from two or more constituents with a continuously varying composition, which results in a continuous variation of material properties from one surface of the material to the other. The concept of functionally graded material is actively explored in coating design where structural and/or functional failures of the coating can happen due to a mismatch between the material prope

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4

Tilbrook, Matthew Thomas Materials Science &amp Engineering Faculty of Science UNSW. "Fatigue crack propagation in functionally graded materials." Awarded by:University of New South Wales. Materials Science & Engineering, 2005. http://handle.unsw.edu.au/1959.4/21885.

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Propagation of cracks in functionally graded materials (FGMs) under cyclic loading was investigated via experiments and finite element (FE) analysis. Alumina-epoxy composites with an interpenetrating-network structure and tailored spatial variation in composition were produced via a multi-step infiltration technique. Compressed polyurethane foam was infiltrated with alumina slip. After foam burn-out and sintering, epoxy was infiltrated into the porous alumina body. Non-graded specimens with a range of compositions were produced, and elastic properties and fatigue behaviour were characterised.

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5

Jivkov, Andrey P. "On crack growth in functionally graded materials." Licentiate thesis, Luleå tekniska universitet, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25814.

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Stress intensity factors' behaviour is studied for long plane cracks interacting with a region of functionally graded elastic material. The region is assumed embedded into a large body treated as a homogeneous elastic continuum. The analysis is limited to small deviations of the graded region's elastic modulus from that of the surrounding body (Poisson's ratio is kept constant) and analytical solutions are sought using a perturbation technique. Emphasis is laid on the case of an infinite strip, which admits a closed form solution. A cosine change of the modulus of elasticity is treated, furnis

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6

Hauber, Brett Kenneth. "Fatigue Crack Propagation in Functionally Graded Materials." University of Dayton / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1259881312.

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7

Garbin, F., F. Garbin, A. Levano, and R. Arciniega. "Bending Analysis of Nonlocal Functionally Graded Beams." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/651836.

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In this paper, we study the nonlocal linear bending behavior of functionally graded beams subjected to distributed loads. A finite element formulation for an improved first-order shear deformation theory for beams with five independent variables is proposed. The formulation takes into consideration 3D constitutive equations. Eringen's nonlocal differential model is used to rewrite the nonlocal stress resultants in terms of displacements. The finite element formulation is derived by means of the principle of virtual work. High-order nodal-spectral interpolation functions were utilized to approx

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8

Richard, Flesner Reuben. "Modeling of Solid Oxide Fuel Cell functionally graded electrodes and a feasibility study of fabrication techniques for functionally graded electrodes." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1473204.

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9

Dietrich, Jan [Verfasser]. "Functional adhesives and functionally graded adhesives in fiber metal laminates / Jan Dietrich." Paderborn : Universitätsbibliothek, 2020. http://d-nb.info/1217325867/34.

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10

Yilmaz, Suphi. "Buckling Driven Delamination Of Orthotropic Functionally Graded Materials." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607836/index.pdf.

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In today&#039<br>s technology severe working conditions increase demands on structural materials. A class of materials which are developed to meet these increased demands is Functionally Graded Materials (FGMs). These are inhomogeneous structural materials which are able to withstand large temperature gradients and corrosive environment. Application areas of FGMs are in aerospace industry, nuclear reactors, chemical plants and turbine systems. FGMs have gradual compositional variation from metal to ceramic which give them mechanical strength, toughness and heat resistance. However under high t

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11

Hart, Nigel T. "Functionally graded interfaces for solid oxide fuel cells :." Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445940.

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12

Luo, Wenjin. "Thermal Shock Fracture Behaviors of Functionally Graded Ceramics." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/LuoW2006.pdf.

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13

SOARES, ALEXANDRE ANDRADE BRANDAO. "NONLINEAR FREE VIBRATIONS OF FUNCTIONALLY GRADED CYLINDRICAL SHELLS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35622@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Cascas cilíndricas são usadas em muitas aplicações de engenharia e, devido a sua forma e capacidade de transporte de carga, são bastante usadas na indústria aeroespacial e em estruturas civis. Elas minimizam a quantidade de material do qual são fabricadas, tornando-se assim estruturas muito leves e esbeltas. Em décadas recentes tem se procurado criar novos materiais que conjuguem múltiplas propriedades como maior resistência, melhor proteção térmica, proteção contra corrosão e

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14

Jackson, Todd Robert. "Analysis of functionally graded material object representation methods." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9032.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2000.<br>Includes bibliographical references (leaves 218-224).<br>Solid Freeform Fabrication (SFF) processes have demonstrated the ability to produce parts with locally controlled composition. To exploit this potential, methods to represent and exchange parts with varying local composition need to be proposed and evaluated. In modeling such parts efficiently, any such method should provide a concise and accurate description of all of the relevant information about the part with minimal cost in terms of storage.

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15

Sarikaya, Duygu. "Mixed-mode Fracture Analysis Of Orthotropic Functionally Graded Materials." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606451/index.pdf.

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Functionally graded materials processed by the thermal spray techniques such as electron beam physical vapor deposition and plasma spray forming are known to have an orthotropic structure with reduced mechanical properties. Debonding related failures in these types of material systems occur due to embedded cracks that are perpendicular to the direction of the material property gradation. These cracks are inherently under mixed-mode loading and fracture analysis requires the extraction of the modes I and II stress intensity factors. The present study aims at developing semi-analytical technique

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16

Sabuncuoglu, Baris. "Fatigue Crack Growth Analysis Models For Functionally Graded Materials." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607024/index.pdf.

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The objective of this study is to develop crack growth analysis methods for functionally graded materials under mode I cyclic loading by using finite element technique. The study starts with the analysis of test specimens which are given in ASTM standard E399. The material properties of specimens are assumed to be changing along the thickness direction according to a presumed variation function used for the modeling of functionally graded materials. The results of the study reveal the influence of different material variation functions on the crack growth behavior. In the second part, the gro

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17

Imery, Buiza Jesus Alberto. "Fracture behaviour of 2124 A1-SiC functionally graded materials." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321715.

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18

Trinh, Luan Cong. "Behaviours of functionally graded sandwich micro-beams and plates." Thesis, Northumbria University, 2017. http://nrl.northumbria.ac.uk/36216/.

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Functionally graded materials (FGMs) are a novel class of materials having unique characteristics formed of two or more constituent phases with a continuously variable composition. The introduction of these materials to the sandwich structures creates more potentials to the structural applications with the ability of tailoring the material properties as well as the possibility of avoiding the delamination and stress concentration in conventional sandwich structures. With the rapid development of technology, it is now common to use FGMs in micro/nanoelectromechanical systems, e.g. thin films, s

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19

Woodward, Ben. "3D modelling of sandwich panels with functionally graded core." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=211061.

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Sandwich panels are a type of structural panel, typically comprising two thin layers of high strength and stiffness known as face sheets which separate a thicker lightweight core of lower strength, stiffness and density. When combined, these layers offer excellent flexural strength to weight ratio without compromising on stiffness. Sandwich panels are utilised in a wide range of industries and applications from aerospace to construction. Due to mismatch of properties between face sheets and core, stress concentrations can occur at the interfaces, often causing delamination. One solution is inc

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20

Awrejcewicz, Jan, Lidiya Kurpa, and T. Shmatko. "Vibration of functionally graded shallow shells with complex shape." Thesis, Department of Automation, Biomechanics and Mechatronics, 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37081.

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The method for studying the geometrically nonlinear vibrations of functionally graded shallow shells with a complex planform is proposed. Сomposite shallow shells made from a mixture of ceramic and metal are considered. In order to take into account varying of the volume fraction of ceramic the power law is accepted. Formulation of the problem is carried out using the refined geometrically nonlinear theory of shallow shells of the first order (Timoshenko’s type). The R-functions theory, variational Ritz’s method, procedure by Bubnov Galerkin and Runge-Kytta method are used in the developed app

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21

Pelletier, Jacob Leo. "Thermoelastic Analysis and Optimization of Functionally Graded Plates and Shells." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/PelletierJL2005.pdf.

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22

Wang, Xuan. "Synthesis of functionally graded materials via electrophoretic deposition and sintering /." Diss., Connect to a 24 p. preview or request complete full text in PDF formate. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3208812.

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23

Kosker, Sadik. "Three Dimensional Mixed Mode Fracture Analysis Of Functionally Graded Materials." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608795/index.pdf.

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The main objective of this study is to model and analyze a three dimensional inclined semi-elliptic surface crack in a Functionally Graded Material (FGM) coating bonded to a homogeneous substrate with a bond coat. The parametric analyses on FGMs are based upon zirconia-yttria (ZrO2-8wt%-Y2O3) FGM coating bonded to a substrate made of a nickel-based superalloy. It is assumed that there is a nickel-chromium&amp<br>#8211<br>aluminum&amp<br>#8211<br>zirconium (NiCrAlY) bond coat between the FGM coating and substrate. Metal-rich, linear variation, ceramic-rich and homogeneous ceramic FGM coating ty

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24

Oyekoya, Oyedele. "Structural integrity of engineering components made of functionally graded materials." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/3802.

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Functionally graded materials (FGM) are composite materials with microstructure gradation optimized for the functioning of engineering components. For the case of fibrous composites, the fibre density is varied spatially, leading to variable material properties tailored to specific optimization requirements. There is an increasing demand for the use of such intelligent materials in space and aircraft industries. The current preferred methods to study engineering components made of FGM are mainly modelling particularly those that are finite element (FE) based as experimental methods have not ye

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25

Pogson, Simon Richard. "Fabrication of functionally graded structures by direct metal laser remelting." Thesis, University of Liverpool, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494170.

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Investigations have been conducted into the production of Functionally Graded Structures (FGS) with varying composition and porosity using Direct Metal Laser Remelting (DMLR), a Rapid Prototyping (RP) technology. Following a series of experiments on a number of metal systems and analyses conducted using a series of metallographic and spectrographic techniques (SEM-EDS, XRD), it has been possible to assess the viability of a processing system to produce tailored structures.

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26

Gleim, Tobias [Verfasser]. "Simulation of Manufacturing Sequences of Functionally Graded Structures / Tobias Gleim." Kassel : Kassel University Press, 2016. http://d-nb.info/1127536443/34.

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27

ALBINO, JUAN CARLOS ROMERO. "FUNCTIONALLY GRADED MATERIALS ON THE DYNAMIC BEHAVIOR OF FLEXIBLE RISERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19447@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho um novo elemento de viga co-rotacionado é apresentado para a análise não-linear geométrica tridimensional, estática e dinâmica, de linhas marítimas de Materiais com Gradação Funcional (MGF). Assume-se que o módulo de elasticidade e a massa específica do material da viga variam ao longo da espessura da seção transversal tubular de acordo com uma lei de potência. Na discretização espacial das equações de equilíbrio, a linha marítima é representada por um elemento de viga de dois nós, com base nas hipóteses do modelo

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28

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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29

DESHMUKH, PUSHKARAJ M. "MODELING ERROR ESTIMATION AND ADAPTIVE MODELING OF FUNCTIONALLY GRADED MATERIALS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1096036755.

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30

SURANA, RAJESH R. "HIGH STRAIN FUNCTIONALLY GRADED BARIUM TITANATE AND ITS MATHEMATICAL CHARACTERIZATION." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1096650232.

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31

Bhatkar, Omkar S. "Facile Fabrication of Functionally Graded Graphene Films for Transient Electronics." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544623828859207.

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32

Shah, Kamran. "Laser direct metal deposition of dissimilar and functionally graded alloys." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/laser-direct-metal-deposition-of-dissimilar-and-functionally-graded-alloys(baa5f8fd-cead-4047-afbf-860844b501d8).html.

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The challenges in the deposition of dissimilar materials are mainly related to the large differences in the physical and chemical properties of the deposited and substrate materials. These differences readily cause residual stresses and intermetallic phases. This has led to the development of functionally graded materials which exhibit spatial variation in composition. Laser direct metal deposition due to its flexibility, it offers wide variety of dissimilar and functionally graded materials deposition. Despite considerable advances in process optimization, there is a rather limited understand

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33

Pines, Michael Louis. "Pressureless sintering of powder processed functionally graded metal-ceramic plates." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1999.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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34

Deshmukh, Pushkaraj M. "Modelling error estimation and adaptive modelling of functionally graded materials." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1096036755.

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35

Oyekoya, Oyedele O. "Structural integrity of engineering components made of functionally graded materials." Thesis, Cranfield University, 2008. http://hdl.handle.net/1826/3802.

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Functionally graded materials (FGM) are composite materials with microstructure gradation optimized for the functioning of engineering components. For the case of fibrous composites, the fibre density is varied spatially, leading to variable material properties tailored to specific optimization requirements. There is an increasing demand for the use of such intelligent materials in space and aircraft industries. The current preferred methods to study engineering components made of FGM are mainly modelling particularly those that are finite element (FE) based as experimental methods have not ye

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36

Okubo, Hitoshi, Hideki Shumiya, Masahiro Ito, and Katsumi Kato. "Insulation Performance of Permittivity Graded FGM (Functionally Graded Materials) in SF6 Gas under Lightning Impulse Conditions." IEEE, 2006. http://hdl.handle.net/2237/9496.

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37

Goupee, Andrew. "Methodology for the Thermomechanical Simulation and Optimization of Functionally Graded Materials." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/GoupeeA2005.pdf.

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38

Pratapa, Suminar. "Synthesis and character of a functionally-graded aluminium titanate/zirconia-alumina composite." Thesis, Curtin University, 1997. http://hdl.handle.net/20.500.11937/988.

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A functionally-graded Al(subscript)2TiO(subscript)5/ZrO(subscript)2-Al(subscript)2O(subscript)3 (AT/zirconia-alumina) composite has been successfully synthesized by an infiltration process involving an alpha-Al(subscript)2O(subscript)3-ZrO(subscript)2 (90:10 by weight) green body and a solution containing titanium chloride. The mass gain after infiltration has been used to estimate the amount of new phase introduced into the system. The phase composition character of the functionally-graded material (FGM) has been determined by x-ray diffraction. The Rietveld "whole pattern" refinement method

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39

Gao, Xiong. "Two-dimensional exact analysis of functionally graded piezoelectric cantilevers under electric and mechanical loadings." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950671.

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40

Janković, Ilić Dragana. "Self formed Cu-W functionally graded material created via powder segregation." Aachen Shaker, 2008. http://d-nb.info/999932683/34.

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41

Bell, Bryan Frederick Jr. "Functionally graded, multilayer diamondlike carbon-hydroxyapatite nanocomposite coatings for orthopedic implants." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7962.

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42

Coco, Suzanne Kemp. "A mechanical and histological study of functionally graded hydroxyapatite implant coatings." View the abstract Download the full-text PDF version, 2008. http://etd.utmem.edu/ABSTRACTS/2008-009-Coco-index.html.

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Thesis (M.S.)--University of Tennessee Health Science Center, 2008.<br>Title from title page screen (viewed on June 10, 2008). Research advisor: Joo Leng Ong, Ph.D. Document formatted into pages (vi, 34 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 31-34).

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Janković, Ilić Dragana. "Self formed Cu-W functionally graded material created via powder segregation." Aachen Shaker, 2007. http://d-nb.info/987900730/04.

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44

Wu, Kangjian [Verfasser]. "Process development for ZrO2-ZrSiO4/NiCr functionally graded materials / Kangjian Wu." Aachen : Shaker, 2013. http://d-nb.info/1050344340/34.

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45

Caraballo, Simon. "Thermo-Mechanical Beam Element for Analyzing Stresses in Functionally Graded Materials." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3024.

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Modeling at the structural scale most often requires the use of beam and shell elements. This simplification reduces modeling complexity and computation requirements but sacrifices the accuracy of through-the-thickness information. Several studies have reported various design approaches for analyzing functionally graded material structures. One of these studies proposed a two-node beam element for functionally graded materials (FGMs) based on first order shear deformable (FOSD) theory. The derivation of governing equations included spatial temperature variation. However, only the constant temp

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46

(UPC), Universidad Peruana de Ciencias Aplicadas, J. Yarasca, J. L. Mantari, and R. A. Arciniega. "Hermite–Lagrangian finite element formulation to study functionally graded sandwich beams." Elsevier B.V, 2016. http://hdl.handle.net/10757/607194.

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This paper presents a static analysis of functionally graded single and sandwich beams by using an efficient 7DOFs quasi-3D hybrid type theory. The governing equations are derived by employing the principle of virtual works in a weak form and solved by means of the Finite Element Method (FEM). A C1 cubic Hermite interpolation is used for the vertical deflection variables while C0 linear interpolation is employed for the other kinematics variables. Convergence rates are studied in order to validate the finite element technique. Numerical results of the present formulation are compared with anal

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47

Vallejos, Augusto, Shammely Ayala, and Roman Arciniega. "Improved First Order Formulation for Buckling Analysis of Functionally Graded Beams." Institute of Electrical and Electronics Engineers Inc, 2020. http://hdl.handle.net/10757/656419.

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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.<br>In this research, an improved first order formulation is presented to study the critical buckling load in functionally graded beams. The formulation has five independent variables in comparison with the Timoshenko theory that has three. The Trefftz criterion is utilized with incremental and fundamental states to define the stability analysis. Virtual work statements are derived for the finite element model where the field variables are interpol

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48

Lee, Seon-Jae. "Micromechanical model for predicting the fracture toughess of functionally graded foams." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013705.

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49

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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50

Bell, Bryan Frederick. "Functionally graded, multilayer diamondlike carbon-hydroxyapatite nanocomposite coatings for orthopedic implants." Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-06072004-131058/unrestricted/bell%5Fbryan%5Ff%5F200405%5Fms.pdf.

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