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 275 for “"thermo-mechanical"”.
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Modelling of thermo-mechanical fatigue behavior in superalloys
Thermo-mechanical fatigue (TMF) and isothermal fatigue (IF) behavior of coated and uncoated Mar-M247 and, uncoated Mar-M246 was studied. The Mar-M247 was coated with Alpak-S1. The coating consists of a manganese and Aluminium powder slurry that is applied by painting, dipping, or spraying with an …
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Modelling and development of thermo-mechanical energy storage
… storage (LAES) are two technologies that use mechanically-driven thermodynamic cycles to store electricity in the form of high-grade thermal energy, employing abundant materials that are kept in large insulated tanks. Both technologies are free from geographic constraints, providing a …
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Thermo-mechanical characterization of carbon-reinforced shape memory polymer
… effect of adding carbon fiber fabric layers on mechanical properties of the pure polyurethane based SMPs. The SMP is thermo-mechanically characterized for its transition temperature (Tg) using Differential Scanning Calorimetry (DSC) and Dynamic Mechanical Analysis (DMA). Fold-deploy shape memory …
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Thermo-mechanical characterisation of energetic materials for additive manufacture
This thesis presents an investigation of the additive manufacture of energetic materials such as polymer bonded explosives and composite propellant. The work focuses on the use of extrusion methods to print the materials as uncured pastes comprising a high volume fraction of solid energetic …
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Thermo-Mechanical Behavior of Polymer Composites Exposed to Fire
… and decomposition is developed to predict the thermo-mechanical behavior and compressive failure of polymer matrix composites (PMCs) subjected to heat and compressive load. An overlaid element technique is proposed for incorporating the model into commercial finite element software ABAQUS. The …
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Concrete at high temperatures: hygro-thermo-mechanical degradation of concrete
… and coherent solution approach to investigate thermo-hygro-mechanical behaviour of concrete, especially under severe heating conditions. The work focuses on the development and extension of an existing analytical, numerical and constitutive model developed at the University of Glasgow. This is …
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Thermo-Mechanical Behavior During Steel Continuous Casting in Funnel Molds
… been developed to investigate the thermal and mechanical behavior of the solidifying steel shell in continuous casting funnel molds, with the goal of understanding the effect of funnel shape on the solidifying steel shell. The numerical models have been calibrated with plant measurements from …
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Determination of thermo-mechanical variables during plain strain compression testing
… of strain and strain rate do not describe the mechanical deformation variables in a particular volume of the PSC spearmen. Therefore, for analytical microstructural models to have better predictive value, the determination of the thermo-mechanical variables during PSC testing is required. The …
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Fracture and failure of layered materials under thermo-mechanical loading
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Thermo-mechanical stress measurement and analysis in three dimensional interconnect structures
… caused serious concerns regarding the thermal-mechanical reliability. Firstly, a semi-analytic approach is introduced to understand stress distributions in TSV structures. This is followed by application of finite element analysis for more accurate prediction of stress behavior according to the …
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Thermo-mechanical behavior of silicon at nanoscale — an in situ investigation
… the micrometer and submicrometer scale exhibit mechanical properties that are substantially different from bulk materials. With the increasing miniaturization of devices, accurate characterization of micro/nanoscale materials and fundamental understanding of their deformation mechanism are …
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Thermo-mechanical model of steel shell behavior in continuous slab casting
… slabs. In order to understand the thermal and mechanical behavior of the shell, a two-dimensional transient stepwise-coupled finite-element model has been developed. The model simulates a transverse section of the slab as it moves down through the mold and below and incorporates the effects of …
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A comparative analysis and optimisation of thermo-mechanical energy storage technologies
… EES store electricity in the forms of thermal or mechanical energy, and are most suitable for large-scale energy storage. As a result, they have received intensive treatment from both the industry and academia, but a comparative study and optimization of these large-scale thermo-mechanical energy …
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Nonlinear heat transfer and thermo mechanical stress analysis using finite elements.
… numerical procedures for the heat transfer and thermo-mechanical analysis of sol id continua. Steady state conduction heat transfer is developed as a particular case of the general field equation. Internal heat generation and the boundary conditions of specified temperatures, flux, convection. …
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Thermo-mechanical modeling of a micro-fabricated solid oxide fuel cell
A micro-fabricated solid oxide fuel cell is currently being designed by the Micro-chemical Power Team(funded under the Multidisciplinary University Research Initiative(MURI) Research Program). In the current design a plate structure vital to power generation is exposed to harsh thermal operation …
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Thermo-mechanical stress relief analysis in PMMA and 6000 series aluminum
… The most common kinds are either thermal or mechanical and are commonly applied to commercial metal alloys. A third type, thermo-mechanical, utilizes thermal gradients to induce residual stresses of an equal and opposite nature to balance compressive and tensile stresses existing in the …
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MODELING OF THERMO-MECHANICAL BEHAVIOR OF NITINOL ACTUATOR FOR SMART NEEDLE APPLICATION
… needle, there is a need to understand Nitinol thermo-mechanical behaviors. Various existing SMA constitutive models were investigated and compared. Since SMA is used as an actuator in this project, only one dimensional constitutive models are considered. Two distinct models with different phase …
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Thermo-mechanical modelling of hot flat-rolling of components with curved profiles
… is adopted for the roll force calculation. Furthermore, the basic assumption, i.e., the rigid perfectly-plastic material assumption, is modified by introducing a concept of an isotropic rate-dependent material. Satisfactory results were obtained in spread, torque and force prediction. To obtain …
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Thermo-Mechanical Reliability and Electrical Performance of Indium Interconnects and Under Bump Metallization
This thesis presents reliability analysis of indium interconnects and Under Bump Metallization (UBM) in flip chip devices. Flip chip assemblies with the use of bump interconnections are frequently used, especially in high density, three-dimensional electronic devices. Currently there are many …
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