Global ETD Search
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 80 for “"Thermal loading"”.
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Analysis of three-dimensional fractures subject to thermal loading
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Illinois integral abutment bridges: behavior under extreme thermal loading and design recommendations
… as part of ICT Research Report ICT-R27-55, Thermal Behavior of IDOT Integral Abutment Bridges and Proposed Design Modifications. The 3-D parametric study focuses on identifying key interactions between the bridge superstructure, the abutment-foundation system, and the soil under thermally …
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Effect of Thermal Loading on the Performance of Horizontally Curved I-Girder Bridges
… in terms of their response to changing thermal conditions. In most cases, it is assumed that bearing design allows expansion and contraction of the superstructure that relieves thermal stresses, but in reality this is rarely true. Bridge curvature complicates the structures response to …
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Stress and Damage Analyses of Thermal Barrier Coatings Under Cyclic Thermal Loading Conditions
The premature failure of the thermal barrier coatings (TBCs) system is a preliminary phenomenon that can significantly limit their applications in gas turbine engines. The delamination of TBCs occurs typically at interfaces between the top coat and bond coat due to thermal mismatch stress via both …
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Experimental investigation of bridge deck with textured epoxy-coated rebars subjected to thermal loading
The deterioration of bridge decks is a problem typically associated with the corrosion of the reinforcing steel. This issue was partially controlled during the 1970s with the incorporation of the epoxy-coating protection system. However, research later demonstrated that the smooth surface resulting …
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Nonlinear finite element analysis of a laminated composite plate with nonuniform transient thermal loading
Metal plates are being replaced by lighter but equally strong laminated composite plates in order to improve efficiency and increase performance of aerospace vehicles. But because of the complex construction of laminated plates they are very difficult to analyze. Conventional thin plate theories …
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Field monitoring and numerical analysis of two Illinois integral abutment bridges
… particularly of the superstructure, under thermal loading and validate employed modeling assumptions through implementation of a field monitoring program. Two Illinois IABs were instrumented to monitor: i) global bridge movements, ii) pile, deck, girder, and approach slab strains, and iii) …
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Stresses and deformations in angle-ply composite tubes
… composite tubes subjected to axisymmetric thermal loading. For the theoretical portion, a generalized plane strain elasticity analysis was developed. The analysis included mechanical and thermal loading and temperature-dependent material properties. Using the elasticity analysis and a …
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Thermo-mechamical modelling of arch dams for performance assessment
… of arch dams is caused principally by thermal effects, with 19% cases attributed to freezing and thawing, and 9% to temperature variations (Daoudu et al., 1997). The temperature loading conditions cause a high expanse of stresses at the various interface locations due to change in …
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Coupled thermo-hydro-mechanical behavior of glacial tills in shallow geothermal systems
… applications whereby the ground is used as a thermal reservoir and soils are subjected to thermal gradients, such as shallow geothermal systems, motivated this study. The soil response under representative field conditions upon heating can affect the performance and overall operation of …
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Thermal and Mechanical Response of Curved Composite Panels
… composite panels subjected to combinations of thermal and mechanical loading conditions. Mechanical loading is due to compressive end-shortening and thermal loading is due to a uniform temperature increase. Thermal stresses, which are induced by mechanical restraints against thermal expansions …
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An analysis of interlaminar stresses in unsymmetrically laminated plates
… plates subjected to extensional, compressive, or thermal loading. Symmetric and unsymmetric 0/90, +45/-45, and 0/+45 laminate stacking sequences are examined to determine the effects of mismatch between adjacent layers in Poisson’s ratio, coefficient of mutual influence, and coefficients of …
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ΘΕΩΡΗΤΙΚΗ ΚΑΙ ΠΕΙΡΑΜΑΤΙΚΗ ΕΡΕΥΝΑ ΤΗΣ ΜΟΝΙΜΗΣ ΚΑΙ ΜΕΤΑΒΑΤΙΚΗΣ ΛΕΙΤΟΥΡΓΙΑΣ ΤΟΥ ΚΙΝΗΤΗΡΑ ΝΤΗΖΕΛ ΜΕ ΣΤΡΑΓΓΑΛΙΣΜΟ ΤΗΣ ΕΞΑΓΩΓΗΣ
… STUDY OF EXHAUST THROTTLED DIESEL ENGINE THERMAL LOADING IS MADE THROUGH THE COMPUTATION OF ENGINE COMPONENT TEMPERATURE FIELDS (CYLINDER, HEAD, PISTONS, EXHAUST VALUES).
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Lateral thermal buckling of pipelines on the sea bed
… on the seabed more susceptible to lateral thermal buckling. A novel small-scale compressible base model, with an expanded polystyrene base compressed beneath a silicone rubber strip, has been developed to represent the constrained thermal loading of a pipeline lying on the seabed. This …
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Simulation of Isothermal Combustion in Gas Turbines
… combustion temperature of the fuel. In addition, thermal limits of turbine blade materials also places an upper bound on turbine inlet temperatures. Thus, the current strategy for improving gas turbine efficiency is inherently limited. Introduction of a new gas turbine, based on an alternative …
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An Investigation of Geopolymers for Use In High Temperature Applications
… thereof are investigated. To simulate the thermal loading that exists in a core meltdown, GCCs in this study are exposed to impulses of thermal energy. To simulate the effects of a structural fire, additional specimens are subjected to at a ramped heating rate. Specimens are also subjected …
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Rail shear testing of composite materials: analysis and experiment
… element analysis includes both mechanical and thermal loading (differential expansion) of the specimens and their elastic rails. Parameters in this analysis of unidirectional and symmetric angle-ply laminates include ply layup angles, specimen length-to-width ratio, the effect of flexible rails …
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Grid integration of wave energy & generic modelling of ocean devices for power system studies
… of power quality and of cables and overhead line thermal loading. Finally, the generic modelling of ocean devices, referring here to both wave and tidal current devices, is investigated.
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Präparation von Ni-C-Multischichten und Mischsystemen mit dem PLD-Zweistrahlverfahren und Untersuchung der thermischen Stabilität der Schichtsysteme
… and allows layer growth under reduced energetic loading of the substrate. In the second part of this work cross beam PLD is used to produce Ni/C multilayers and artificial mixtures. The interest is focused on the mechanisms of layer disintegration and structure formation under thermal loading. …
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