Principles of mechanical design: Engineering design of mechanical components. Components and systems used in the power generation industry: design requirements. Structural mechanical design, general requirements.
Methods for the selection of materials in mechanical design: Structural materials for the design of components and systems operating at high temperatures, Ashby’s method for the selection of materials, with particular emphasis on temperature dependent properties.
Durability and structural integrity assessment: complements on life and durability assessment of mechanical components and products; complements on high-cycle fatigue (HCF) and low-cycle fatigue (LCF) with special emphasis on high temperature effects, complements on fracture mechanics, creep of engineering materials, creep-fatigue interaction and creep-fatigue life assessment methods, elements of thermo-mechanical fatigue, environmental effects (oxidation, etc.), with special emphasis on high temperature effects. Life and durability assessment and transferability of experimental results to the design of mechanical components.
Mechanical properties of materials for high temperature applications
High temperature metallic alloys: monotonic and cyclic properties; typical applications; short description of production technologies, with special emphasis on their effect on mechanical properties (e.g., superalloys for gas turbine blades);
Engineering polymers and composite materials for high temperature applications: temperature dependence on the mechanical properties; typical applications; characteristic temperatures; specific design methods (brief mention);
Ceramic coatings: typical mechanical properties; use; main failure modes; specific design methods.
Components for high temperature applications: calculation of stress and strains under monotonic and cyclic loading (in particular, thermal stresses), effect of notches under elasto-plastic conditions, creep-fatigue interaction, durability assessment of typical components employed in the power generation industry (turbine blades, rotor discs, etc.).
Case studies: Simplified case studies of components employed in turbomachinery and internal combustion engines. Service strength, mechanical design.
Tutored design lab: Thermal stresses, creep and fatigue life calculation under service conditions of turbomachinery components.
Experimental lab: Experiments for the derivation of mechanical properties of materials for high temperature applications (to be activated depending on the attendance).
Small groups teamwork (2-3 students) is allowed. Students should be able to complete the short-projects within the allocated time for tutored computer lab (class time).