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Scheda Riassuntiva
Anno Accademico 2017/2018
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 096246 - MECHANICAL BEHAVIOUR AND FAILURE OF METALS
Docente Vedani Maurizio , Vergani Laura Maria
Cfu 10.00 Tipo insegnamento Corso Integrato

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - BV (478) NUCLEAR ENGINEERING - INGEGNERIA NUCLEARE*AZZZZ096246 - MECHANICAL BEHAVIOUR AND FAILURE OF METALS
091729 - FAILURE AND CONTROL OF METALS
Ing Ind - Inf (Mag.)(ord. 270) - BV (483) MECHANICAL ENGINEERING - INGEGNERIA MECCANICA*AZZZZ089474 - MECHANICAL BEHAVIOUR OF MATERIALS
Ing Ind - Inf (Mag.)(ord. 270) - MI (491) MATERIALS ENGINEERING AND NANOTECHNOLOGY - INGEGNERIA DEI MATERIALI E DELLE NANOTECNOLOGIE*AZZZZ096246 - MECHANICAL BEHAVIOUR AND FAILURE OF METALS

Programma dettagliato e risultati di apprendimento attesi

LECTURES

-Stress-strain equations and models: review of elastic deformation (elastic constants, Hooke's law, volumetric strain and hydrostatic stress) and plastic deformation (stress-starin models, unloading and response of models)

-Mechanical testing: tension test (engineering stress-strain properties, strength, ductility, necking, hardening, true-stress curves); compression test; bending and torsion test

-State of stress and strain: review of principal plane and three-dimensional states of stresses (Normal, shear stresses) Yielding and fracture under combined state of stresses: maximum normal stress fracture criterion; maximum shear stress yield criterion; octhaedral shear stress yield criterion.

-Notches: definition of theoretical stress concentration factor and experimental stress concentration factor; elastic behaviour and initial yielding; fully plastic yielding; Neuber rule to estimate notch stress and strain.

-Linear-elastic fracture mechanics: effect of cracks on strength; strain energy release rate; stress intensity factor, fracture toughness of materials; effect of thickness; plastic zone near the crack tip (plane stress and strain); fully plastic loads

-Fatigue of materials: introduction and definitions; stress based approach (Wöhler curves, fatigue limits, factors affecting long life fatigue strength); notch effect and sensitivity; mean stress effect. Strain based approach to fatigue: cyclic behaviour of materials; strain-life tests (Coffin-Manson equations); trends for engineering materials, factors affecting strain-life curves; mean stress effect.

-Fatigue crack growth: fatigue crack growth testing; Paris law; trends with materials; life estimates for constant amplitude loading.

-Composite materials: introduction; anisotropic Hooke’s law; orthotropic materials; elastic modulus parallel to fibers; elastic modulus transverse to fibers; fracture criterion for orthotropic materials.

EXPERIMENTAL LABORATORIES:  Fracture mechanics. 

 


Note Sulla Modalità di valutazione

The exam consists in a written test


Bibliografia

Mix Forme Didattiche
Tipo Forma Didattica Ore didattiche
lezione
72.0
esercitazione
32.0
laboratorio informatico
0.0
laboratorio sperimentale
0.0
progetto
0.0
laboratorio di progetto
0.0

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.5 / 1.6.5
Area Servizi ICT
15/05/2021