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.
Results
Showing 1 to 10 of 10 for “"Thermomechanical Behavior"”.
-
Interfacial Thermomechanical Behavior of Hybrid Carbon Fibers
… push-in tests to analyze the interfacial behavior. The load-displacement curves of these push-in tests denote a clear nonlinearity where debonding occurs, and the debonding loads are used to calculate interfacial shear stress. A 15-20% improvement in interfacial strength was observed with …
-
Thermomechanical behavior of advanced manufactured heat-resistant alloys and their weldments
… of Gen3 CSP applications. The isothermal LCF behavior of Haynes 282 (H282) was evaluated under four material conditions: wrought, AM, and gas tungsten arc weldments (GTAW) of both. LCF testing at 750°C across four strain ranges (0.6-1.2%) revealed shorter fatigue lives in AM samples compared …
-
Thermomechanical behavior of single crystal silicon microbeams under bending at elevated temperatures
… at room temperature, others reported brittle behavior. This thesis challenges the notion of a precise BDT temperature in single crystal silicon, unlike Curie temperature in ferromagnetic materials when phase change occurs. We hypothesize that brittleness or ductility in silicon is the outcome …
-
Preferential nanoreinforcement of thermoplastic polyurethane elastomers with dispersed nano-clay
… for providing enhanced and possibly-tunable thermomechanical behavior. However, the biggest challenge facing advances in polymer/clay nanocomposites is the complete dispersion of nano- clay within the polymer matrix due to thermodynamic and kinetic limitations. A novel solvent exchange method …
-
Constitutive modeling of the thermo-mechanics associated with crystallizable shape memory polymers
… equations has been developed to model the thermomechanical behavior of crystallizable shape memory polymers using elements of thermodynamics, continuum mechanics and polymer science. Models are developed for the original amorphous phase, the temporary semi-crystalline phase and transition …
-
Fuel performance modeling of high burnup mixed oxide fuel for hard spectrum LWRs
… design constraints and regulatory limits, the thermomechanical behavior of this reactor has been analyzed through fuel performance modeling. Due to its unique design characteristics, several physical phenomena at high temperature and high burnup typically ignored in most LWR fuel performance …
-
Influence of Sidechain Structure and Interactions on the Physical Properties of Perfluorinated Ionomers
… the primary objectives was to characterize the thermomechanical relaxations for short sidechain PFSAs developed by 3M and Solvay, as well as a new multi-acid sidechain perfluoroimide acid ionomer (PFIA) from 3M. Partial neutralization experiments played a key role in systematically manipulating …
-
Influence of Electrostatic Interactions and Hydrogen Bonding on the Thermal and Mechanical Properties of Step-Growth Polymers
… dynamic mechanical analysis (DMA) and tensile behavior are described. In addition, the use of preformed urethane segments provides a safer method for incorporating hydrogen bonding functional groups into macromolecules. In order to compare the thermomechanical and morphological properties of …
-
Experimental and Numerical Explorations of Fire Performance of Intumescent Thermoplastic Composites for Electric Vehicle Battery Enclosures
… approach was implemented to replicate pool-fire thermomechanical loading on horizontally oriented plate-scale composite specimens in a safer and more controlled manner. One-sided fire exposure generated using a sand burner reproduced pool-fire-like conditions, while steel cylinders were …