33923 - Machine Construction M

Academic Year 2023/2024

  • Docente: Dario Croccolo
  • Credits: 6
  • SSD: ING-IND/14
  • Language: Italian
  • Moduli: Dario Croccolo (Modulo 1) Stefano Fini (Modulo 2)
  • Teaching Mode: Traditional lectures (Modulo 1) Traditional lectures (Modulo 2)
  • Campus: Bologna
  • Corso: Second cycle degree programme (LM) in Mechanical Engineering (cod. 5724)

Learning outcomes

The outcomes of the course are to provide the advanced knowledge, the methods and the tools useful for the correct organization of the mechanical design activities of new or revised products. At the end of the course the students will be able to evaluate the technical and economical impact of the decisions assumed during the designing phase and will be able to reproduce the representation of a complex mechanical system, to define the relationship between the elements, to calculate the constraints, to draw the load diagrams and to compute the maximum tensile state of the components. Furthermore, they will be able to select the most appropriate type of shaft‑hub mechanical connection.

Course contents

Introduction to product design: design set up, design develop and design manage.

The shaft‑hub couplings: drive fit, taper fit

Shape couplings

Tongue fit and spline hole/shaft

The pressure vessels

The gear design. The tooth stress: the bending and the pitting strength. The cylindrical gears straight-toothed and helical-toothed. The conical gears.

Pins and pegs

Springs and elastic elements


Texts references

Dario Croccolo, Nicolò Vincenzi - Lezioni di fondamenti e tecnica della progettazione meccanica  - Società Editrice Esulapio - Bologna - 2011

Dario Croccolo, Massimiliano De Agostinis, Giorgio Olmi - Esercizi di Coportamento meccanico dei materiali ed Elementi delle macchine  - Società Editrice Esulapio - Bologna - 2013

Dario Croccolo, Massimiliano De Agostinis, Giorgio Olmi - Esercizi di Costruzione di macchine e Tecnica delle costruzioni meccaniche  - Società Editrice Esulapio - Bologna - 2013

Distributions and slides of the course


Recommended readings 

Pahl G., Beitz W., Feldhusen J., Grote K.-H., [http://www.springer.com/it/book/9781846283185] - A Systematic Approach, 2007, Springer, ISBN 978-1-4471-6025-0


Ullman G.D.

“The Mechanical Design Process”

Mc Graw-Hill, 1992.


Ulrich Karl T., Eppinger D.

“Progettazione e sviluppo di prodotto”

Mc Graw-Hill, 2000.


R. Giovannozzi

“Costruzione di macchine” vol I e II

Patron, Bologna



“Elementi di macchine” vol I, II, III

EST Springer–Verlag Berlin, Heidelberg, New York


RC. Juvinall, K.M. Mrshek

“Fondamenti della progettazione dei Componenti delle Macchine”

Ed. ETS, Pisa, 2002


Gevirtz C.,

“Developing new products with TQM”

McGraw-Hill, 1994

Teaching methods

The course includes theoretical lectures given with the aid of multimedia systems. The didactic material will be uploaded at the end of the course on the platform “AMSCampus”(http://campus.unibo.it/)

Assessment methods

The assessment of learning is performed through a written test and an oral test, both in presence.

The written test lasts three hours and consists of the solution of three numerical exercises, on the following topics.

  1. Resolution of a shaft-hub coupling.
  2. Selection and verification of a joint made by means ok elastic springs, pins of gears.
  3. Verification of a thin wall pressure vessel.

During the written test, any kind of books and tables can be consulted. You can use spreadsheets present on personal computers as long as you start from blank sheets. All the formulas, the steps for obtaining the results and the individual numerical results must, however, be reported in the examination files.

Each exercise is assigned the maximum score of 10 points out of 30.

The test is passed if the overall grade (given by the sum of the partial scores) is of at least 18/30.

The oral exam aims to verify the learning of the theoretical topics covered in class and must be carried out within the three sessions scheduled for the exam session in which the written exam was taken (summer or autumn period). Taking the first available oral exam is recommended in order to be able, if necessary, to repeat the written exam.

In accordance with Art. 16, paragraph 5 of the Didactic Regulations, the grade obtained in the written test can be refused only once.

Teaching tools

PC projector. PC. Overheadprojector. Blackboard.

Office hours

See the website of Dario Croccolo

See the website of Stefano Fini


Quality education Industry, innovation and infrastructure

This teaching activity contributes to the achievement of the Sustainable Development Goals of the UN 2030 Agenda.