The course aims at providing further knowledge to what was learned in the base courses of mechanical and automotive design. In particular, the course provides the fundamentals of machine component design and analysis, with selected reference to machine components used in vehicles and to their integration into complex systems. of One of the course objectives is the application of previously acquired knowledge on the strength of materials under static, dynamic, thermal and fatigue loads to the design of the machine components.

Students are expected to acquire the knowledge related to the methodologies for the design of some of the most relevant machine components and of mechanical systems, with particular reference to the automotive engineering, taking into account the different types of applied loads (mission) and their interaction with other parts of the same machine (system).

Engineering drawing, Fundamentals of strength of materials, Applied mechanics, Science and technology of materials or Technology of metallic materials.

Strength of materials: – Recall of the calculation of equivalent stress and possible failure modes – Recall of fatigue strength of materials; factors influencing the fatigue life, fatigue characteristic data and standard diagrams; stress concentration due to notches; load time histories, damage and damage accumulation. – Hertz theory for the calculation of the contact pressure, strength of materials to contact loads and wear problems Mechanical joints: – Threaded joints, axial load and tightening torque, static and fatigue design. – Welded joints: weld types made by arc welding, static and fatigue verification according to the normative, typical defects and evaluation of the weld class. Machine elements and their design: - Roller bearings: selection in the catalog, equivalent load, life estimation, lubrication, assembly and site preparation; – Mechanical springs: Torsion bars, cylindrical helical springs, lamina spring and leaf springs, conical disc springs; – Notes on friction clutches; – Transmission joints: articulated, universal and homokinetic joints; – Cylindrical spur gears, tooth involute profile, modular geometry, length of the contact path, transmission ratio, specific sliding coefficients, gear tooth bending and surface fatigue failure, criteria for the selection of the module.

The course is organized in theoretical lectures and classroom practices/tutorials. During the tutorials in the classroom, the students will develop exercises on the topics covered during lectures. Students will also be asked to develop small projects related to motor vehicle components and subsystems, applying in a comprehensive/integrated way some of the methods for design and verification explained during the course.

Slides and notes will be made available to students Even if there is not a textbook covering all the subjects developed during the course, the following books are recommended as useful readings: - A.R. Juvinall, K.M. Marshek - "Fundamentals of machine component design", Wiley - M. Rossetto - "Introduzione alla fatica", ed. Levrotto & Bella, Torino - J. Bannantine – “Fundamentals of metal fatigue analysis”, Prentice Hall 1990 Further reference books - R. Giovannozzi - "Costruzione di Macchine", ed. Patron, Bologna - J.A. Collins - "Failure of materials in mechanical design", ed. Wiley, New York - Wahl - "Mechanical springs"

Modalità di esame: Prova orale obbligatoria; Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo;

The final exam is devoted to evaluate the knowledge acquired in Machine design. The final exam consists in a written part and an oral part, both of them will take place, according to the general procedures defined by the Politecnico, through the PoliTo portal connection. The written part will take place probably with the Exam platform, with the use of the proctoring Respondus, while for the oral part either the same platform or a different connection mode (e.g TEAMS) could be used. Detailed explanation of the rules and specific advices will be given through documents shared on the course portal. The written part generally consists in the solution of a couple of design and verification problems. During the tutorials, students will develop the solution of problems similar to those they will be asked to solve during the written exam. During the written exam student can use, for consultation purpose, books, the lecture slides and the tutorial materials. The oral part of the exam is devoted to verify the level of knowledge of the Machine Design topics that have been taught during the lectures. The ability of the student to explain from the theoretical point of view the asked questions, making use of formulas, diagrams and sketches, is of particular importance. It is also of relevance the ability of the student to explain technical constructive solutions by means of pencil sketches. To pass the written test, students have to obtain an evaluation equal or larger than 18/30 for each of the problems that the written test is made of. In order to take the oral exam, the candidate must have passed the written test. The written and oral parts of Machine Design have to be taken in the same exam session. Booking through the portal is mandatory.

Modalità di esame: Prova scritta (in aula); Prova orale obbligatoria; Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo;

The final exam is devoted to evaluate the knowledge acquired in Machine design. The final exam consists in a written part and an oral part, both of them will take place according to the general procedures defined by the Politecnico. Depending on the general situation and according to the decision of the Politecnico, both written and oral part could take place in a mixed mode: students that will be allowed to enter the Politecnico rooms could take the exam in the traditional mode, all the other students will take the exam through the PoliTo portal connection. Naturally, students will be informed in advance in a detailed way of this mix mode type. The written part, in case of remote mode, will take place probably with the Exam platform, with the use of the proctoring Respondus, while for the oral part either the same platform or a different connection mode (e.g TEAMS) could be used. Detailed explanation of the rules and specific advices will be given through documents shared on the course portal. The written part generally consists in the solution of a couple of design and verification problems. During the tutorials, students will develop the solution of problems similar to those they will be asked to solve during the written exam. During the written exam student can use, for consultation purpose, books, the lecture slides and the tutorial materials. The oral part of the exam is devoted to verify the level of knowledge of the Machine Design topics that have been taught during the lectures. The ability of the student to explain from the theoretical point of view the asked questions, making use of formulas, diagrams and sketches, is of particular importance. It is also of relevance the ability of the student to explain technical constructive solutions by means of pencil sketches. To pass the written test, students have to obtain an evaluation equal or larger than 18/30 for each of the problems that the written test is made of. In order to take the oral exam, the candidate must have passed the written test. The written and oral parts of Machine Design have to be taken in the same exam session. Booking through the portal is mandatory.