Salviato, MarcoYao, Jichen2025-08-012025-08-012025-08-012025Yao_washington_0250O_28063.pdfhttps://hdl.handle.net/1773/53361Thesis (Master's)--University of Washington, 2025Future applications of polyetherimide (PEI) extend beyond structural panels and insulation to include vibration-damping layers, impact-resistant aerospace skins, thermal-acoustic insulation, and multifunctional components in satellites and aircraft cabins. By using dynamic mechanical analysis (DMA), a constitutive model for bubble growth under CO_2 saturation is developed, capturing glass transition effects and growth of nanofoam cells. Key properties such as cell growth rate, CO_2 concentration, porosity, and stress are extracted, supporting simulation-driven design of next-generation aerospace structures with enhanced durability, thermal stability, and energy absorptionapplication/pdfen-USCC BY-NC-NDAdvanced Polymer FoamsAerospace MaterialsConstitutive ModelingDynamic Mechanical AnalysisPolyetherimideSimulation-Driven DesignAerospace engineeringMaterials ScienceMechanical engineeringAeronautics and astronauticsThesis