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Scheda Riassuntiva
Anno Accademico 2017/2018
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 095841 - MACHINE DESIGN 2
Docente Giglio Marco
Cfu 10.00 Tipo insegnamento Monodisciplinare

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*EP095841 - MACHINE DESIGN 2
Ing Ind - Inf (Mag.)(ord. 270) - BV (483) MECHANICAL ENGINEERING - INGEGNERIA MECCANICA*EP095841 - MACHINE DESIGN 2

Programma dettagliato e risultati di apprendimento attesi

The main objective of the course is to provide the students with the necessary design tools for the design and assessment of machine parts, both under static and fatigue loading. The basics of mechanical design are upgraded in order to include advanced theory of elasticity, finite element analysis, design methods for static and fatigue loads (multiaxial and variable amplitude loading) and tools for assessing the influence of defects on static and fatigue strength. Theory of elasticity is extended in order to make it possible to evaluate stresses in typical mechanical parts like pressure vessels, welded junctions, power transmission shafts, and validate finite element analyses.

 

Subjects description

Structural Analysis.

  • Statically undetermined systems: Force Method
  • Theory of Plates and Shells: Circular Plates
  • Axissimmetric problems: Thin and Thick Cylinders loaded by internal and external pressure and centrifugal loads.
  • Finite element modelling: basic formulation, definition of stiffness matrix, main shape functions. 

Strength of materials and assessment criteria

  • 3D state of stress, multiaxial failure theories
  • Cyclic response of materials: High Cycle Fatigue. Endurance limit, Fatigue strength, Modifying factors, Stress Concentration and Notch Sensitivity, Multiaxial Fatigue, Variable Amplitude loading, Cumulative Fatigue damage
  • Linear Elastic Fracture Mechanics: energy approach (Griffith), Stress Intensity Factor, KIC, Crack Propagation

Design of Machine Elements

  • Shaft and Shaft Components. Materials, layout, design for stress, deflections, critical speeds, components, fits.
  • Welding and the Design of Permanent Joints. Stresses in Welded Joints, Strength of Welded Joints.

Case Studies

Railway Axle Case Study. General Analysis, Design of Shafts, Shrink Fits, Fatigue Assessment

Pressure Vessel Case Study.  Validation of Analytical Methods by Means of FEM analysis and Lab Tests.

 

Information resources and literature

[1] J.E. Shigley et Al.: Mechanical Engineering Design, McGraw-Hill, 9th Edition, 2011

[2] N. E. Dowling Mechanical Behavior of Materials, 4/E, Prentice Hall, 2013

[3] Lecture notes by the teacher

 

Recommended prerequisites

Mechanics of Structures and Basic Machine Design

 


Note Sulla Modalità di valutazione

The exam includes a written test and an oral one, both or them are compulsory and cover the full program of the course.

Attendance to the lessons and laboratory is not compulsory.


Bibliografia

Mix Forme Didattiche
Tipo Forma Didattica Ore didattiche
lezione
54.0
esercitazione
36.0
laboratorio informatico
23.0
laboratorio sperimentale
4.0
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
11/08/2020