28555 - Automatic Machines

Learning outcomes

The course aims to provide the knowledge related to the mechanical behaviour of materials and the methodologies for the analysis, and the design of mechanical elements used in automatic machines. At the end of the course, the student: -can study and design elastic and slender bodies accounting their ability to deform under different types of static load; -can create mathematical models to describe the mechanical behaviour of elastic and slender bodies to be used in automatic machines; -it can analyse the behaviour of elastic and slender bodies when subject to vibrations.

Course contents

The course is organized into three modules. The three modules are developed in parallel during the lecture period.

The modules cover the topics of the Mechanical Behaviour of Materials for Mechatronics and Vibration of Solids.

Details are given below.

M1-1 Statics of rigid bodies and calculation of constraint relationships in the case of loads and moving constraints

M1-2 Internal actions in slender bodies (e.g. beams) and their diagrams

M1-3 The concept of deformation in slender bodies, simple and composite, including uniform and non-uniform thermal fields

M1-4 The concept of strain in slender, simple and composite bodies, also in the presence of uniform and non-uniform thermal fields

M1-5 Constitutive laws for materials (metallic, plastic and ceramic); with emphasis on quasi-static and viscoelastic behaviour

M1-6 Study of the four stress cases (normal stress, torsion, pure bending and bending with shear), also in the presence of uniform or variable thermal fields, with particular regard to the analysis of displacement fields of slender bodies and their application in mechatronics

M1-7 Beam deflection and its differential equations; exercises and applications of the Study of beam deflection under moving loads and constraints

The following topics are developed about vibrations:

M2-1 Study of the vibration of systems with one degree of freedom

M2-2 Matrix analysis of structures subjected to static and dynamic loads; Study of the vibration of elastic systems with many degrees of freedom

M2-3 Study of the vibration of continuous bodies subjected to normal, torsional and bending stresses

All modules are completed through exercises.

Some of the exercises are carried out by the lecturers during the lectures (there is no specific day for the exercises).

Other exercises are only set by the lecturers in the classroom, and students must complete them at home independently and collect them in an exercise book that will form part of the oral examination. Finally, additional exercises are also assigned to the students, and they must complete them independently at home and collect them in the exercise book that will be the subject of discussion during the oral examination.

Readings/Bibliography

1. Notes of the teacher

2. James M. Gere, Barry J. Goodno, Mechanics of Materials, Cengage Learning, 2012

3. Sanjay Govindjee, Engineering Mechanics of Deformable Solids, Oxford University Press, 2013

4. R. C. Hibbeler, Statics, Pearson Prentice Hall, 2016

5. R. C. Hibbeler, Mechanics of Materials, Pearson Prentice Hall, 2016

6. R. C. Hibbeler, Dynamics, Pearson Prentice Hall, 2016

7. Robert C. Juvinall, Kurt M. Marshek, Fundamentals of Machine Component Design, John Wiley & Sons, 2012

8. Marco Giglio, Massimiliano Gobbi, Stefano Miccoli, Michele Sangirardi, Costruzione di Macchine, McGraw Hill, 2010

Teaching methods

Frontal teaching in the classroom with use of slides and videos.

The course is developed both providing theoretical concepts and carrying out and assigning theoretical exercises and applications related to construction aspects of Automatic Machines.

To students are assigned exercises to be carried out autonomously and individually (only if specified by the teacher some exercises may be carried out in groups and, in this case, the names and surnames of the students who participated in the group must be specified in the homework book). These exercises must be collected, in an orderly manner, in a homework book that the students must bring to the exam for oral discussion.

Assessment methods

The examination will cover the topics covered during all modules and take the form of an oral interview with the lecturers. During the oral examination, the student must answer theory questions and discuss the exercises collected in the homework book. In addition, the lecturers will ask the students cross-curricular and reasoning questions relating to the topics and exercises covered in class and assigned at home. During the oral examination, 6 questions will be asked. To pass the examination, the student must answer at least 5 of the 6 questions correctly and comprehensively.

Teaching tools

PowerPoint presentations and audiovisual.

Office hours

See the website of Andrea Zucchelli

See the website of Carlo Gotti

See the website of Mattia Mele