Teacher
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FANELLI Pierluigi
(syllabus)
The problem of De Saint Venant. Setting and solution. Simple stresses : normal stress, bending, biaxial bending, compression bending, torsion, shear. The criteria of resistance to brittle and ductile materials: the elastic limit. Design methods. Pre-design of structural components. Static checks, deformability checks, fatigue checks. Stress: Calculation in one-dimensional elements. Tensile, bending and torsion stresses in one-dimensional elements. Coefficient of stress concentration Kt. Materials: Mechanical characterization of materials. Fatigue: Fatigue resistance in absence of defects, trigger mechanisms and propagation. Transmissions: Classification of gear transmissions. Features of involute profiles. Modular proportioning. Calculation of thickness of the tooth. The interference and methods for its elimination. Function of a mechanical power transmission. Principle relations: transmission ratio, power, torque, efficiency, etc. General information on the design of the gears. Involute teeth correction. Loads on shaft from Cylindrical spur gears and helical gears. Strength calculation of gears: bending of the teeth. General information about the strength calculation of gears and load distribution on teeth pairs.
(reference books)
- Juvinall, Marshek - Fondamenti di costruzione di macchine - Editore: CittàStudi - Giovannozzi, Costruzione di macchine, Patron
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