The objective of this course is to provide the concepts, procedures, decision analysis techniques necessary to design machine elemnts commonly found in mechanical and naval devices.
The aim of this course is to supply overall methods for machine design in reference to static, fatigue strength, and brittle failure
classroom lessons
What’s Machine design
Materials
Static strenth, Plastic deformation, Strength and hardness, Viscoelasticity, Creep and temperature properties
Design for static strength
Failure of ductile and brittle materials, Stress concentration, Determination of stress concentration factors, Stress concentration charts, Design for static strength with notched elements
Design for fatigue strength
S-N diagram, High-cycle fatigue, Endurance –limit modifying factors, Stress-concentration effects, Torsion, stress due to combined loading, Cumulative fatigue damage
Fracture mechanics
Stress state in a crack, SIF, Critical stress-intensity factor, Fracture toughness factors, Fatigue cracks propagation
Pressure vessel design
Cylindrical and spherical pressure vessels: thick and thin-walled vessel, shrink fits
Shafts
Flexural vibration, Torsional vibration
Weldings design for static and fatigue loads
Flexible mechanical elements
J.E. Shigley, “Mechanical Engineering Design”, MCGraw-Hill
R.E. Peterson, “Stress Concentration factors”, Wiley-Interscience Publication
R.W. Hertzberg, “Deformation and fracture mechanics of engineering materials”, John Wiley & Sons
R.C. Juvinall, “ Fundamentals of machine component design”, John Wiley & Sons
Ricevimento: The teacher is available for the students at the end of lessons and by appointment
MARGHERITA MONTI (President)
GIOVANNI BERSELLI
ROBERTO RAZZOLI
PAOLO SILVESTRI
oral examination
prerequisites: continuum mechanics
