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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Functionally Graded Materials"”.
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Fatigue crack propagation in functionally graded materials
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 …
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Design, fabrication, and characterization of functionally graded materials
… the feasibility of fabricating custom designed, graded materials using Laser Metal Deposition (LMD) that will cater for functionality and unconventional repair. The ultimate goal of the project is to establish the versatility of LMD for fabricating advanced materials and tackling problems that …
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Fabrication, Characterization and Modeling of Functionally Graded Materials
… (PV) cells onto a substrate through a functionally graded material (FGM) with water tubes cast inside, through which water flow serves as both a heat sink and a solar heat collector. Due to the unique and graded material properties of FGMs, this novel design not only supplies efficient …
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Mixed-Mode Crack Propagation in Functionally Graded Materials
… parameters describing the crack tip fields in functionally graded materials (FGMs) include stress intensity factors (SIFs) and T-stress (non-singular stress). These two fracture parameters are important for determining the behavior of a crack under mixed-mode loading conditions in brittle FGMs …
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Characterization of functionally graded materials through fractal geometry
Functionally Graded Materials are the material systems whose properties vary spatially through the solid. These material systems are fairly new and though expensive to fabricate; they serve as excellent engineering materials for various applications. The material system we consider in this work is …
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Incorporating Functionally Graded Materials and Precipitation Hardening into Microstructure Sensitive Design
… methods of MSD are applied to the design of functionally graded materials. Analysis models are presented to allow the design of compliant derailleur for a case study and constraints are placed on the design. Several methods are presented for relating elements of the microstructure to the …
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ADDITIVE MANUFACTURING OF SUPERHYDROPHOBIC STAINLESS STEEL COMPOSITES
… the Navy can benefit from the use of novel materials that prevent corrosion, decrease drag on ships, and decrease hydrodynamic noise as platforms move through the water. This research studied the development of materials that achieve these goals by demonstrating superhydrophobic surface …
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Design, Analysis and Fabrication of Complex Structures using Voxel-based modeling for Additive Manufacturing
… realize parts featuring complex geometries and functionally graded materials. This thesis specifically aims to explore applications in three distinct fields namely, (i) Design for AM, (ii) Design for Manufacturing (DFM) education, and (iii) Reverse engineering from imaging data wherein …
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Optimal design and freeform extrusion fabrication of functionally gradient smart parts
… of the CODE process and enable manufacturing of functionally graded materials with an optimum distribution of material composition. As an application of the CODE process, advanced ceramic components with embedded sapphire optical fiber sensors were fabricated and properties of parts and sensors …
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Multimode Nonlinear Vibration Analysis of Stiffened Functionally Graded Double Curved Shells in a Thermal Environment
… of stiffened double curved shells made of functionally graded materials under thermal loads. The formulation is based on the first order shear deformation shell theory in conjunction with the von Kármán geometrical nonlinear strain-displacement relationships. The nonlinear equations of …
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Design and development of a powder mixing device used in the deposition of high velocity oxy-fuel (HVOF) thermal spray functionally graded coatings; Kabir Al Mamun
The application of Functionally Graded Materials (FGMs) is quite difficult, but thermal spray processes like Plasma spray have demonstrated their unique potential in producing graded deposits, where researchers have used twin powder feed systems to mix different proportions of powders. However the …
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Distance based heterogeneous volume modelling.
… modelling, and more specifically in modelling functionally graded materials and structures using different types of distances and approximation thereof. We demonstrate the benefits of heterogeneous volume modelling using smooth approximate distance fields with various applications, such as …
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Design of functionally graded compliant mechanisms using topology optimization
… applies topology optimization to create feasible functionally graded complaint mechanism designs with the aim of improving structural performance compared to traditional homogeneous compliant mechanism designs. Structural performance is assessed with respect to mechanical/geometric advantage and …
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Characterization and Modeling of the Thermal Properties of Photopolymers for Material Jetting Processes
… has the ability to deposit multiple, functionally graded materials on a pixel by pixel basis. Although there is existing literature on other PolyJet material properties, there is limited research on their thermal characterization. The goal of this work is to determine the thermal …
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Freeform extrusion fabrication of advanced ceramics and ceramic-based composites
… material. Finally, ceramic composites with functionally graded materials (FGMs) were fabricated by the CODE process using a dynamic mixing device"--Abstract, page iv.
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Production of steel matrix composites by mechanical milling and spark plasma sintering
… metal matrix composite (MMC) coatings and functionally graded materials have been proposed as a good solution for improving wear resistance. In this PhD thesis powder metallurgy has been applied for the production of particle reinforced HWTSs. Mechanical milling (MM) and mechanical alloying …
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Free Vibration of Bi-directional Functionally Graded Material Circular Beams using Shear Deformation Theory employing Logarithmic Function of Radius
… without sacrificing strength is to make them of Functionally Graded Materials (FGMs) that are composites with continuously varying material properties in one or more directions. In this thesis, we study free vibrations of FGM circular beams by using a logarithmic shear deformation theory that …
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Structural and Vibration Analysis of Polymeric Functionally Graded Plates
Functionally graded materials (FGMs) are advanced engineered materials whereby material composition and properties vary spatially in the macroscopic length scale. Accurate analytical and numerical models for prediction of mechanical behaviour and damage of the FG plate are required as their …
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Cohesive zone modeling of fracture of sustainable and functionally graded concrete
… better, more situation dependent construction materials; materials which are able to satisfy strength requirements while also able to accommodate other design requirements such as ductility, fracture resistance, thermal resistance/insulation, etc. Functionally graded materials (FGMs) are one …
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Modeling and Simulation of Random Processes and Fields in Civil Engineering and Engineering Mechanics
… work in modeling and analyzing heterogeneous materials using the eXtended Finite Element Method (XFEM) with arbitrarily shaped inclusions. A novel enrichment function, which can model arbitrarily shaped inclusions within the framework of XFEM, is proposed. The internal boundary of an …
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