88147 - Fundamentals of Mechanics P

Learning outcomes

The student acquires the bases for the interpretation and execution of technical drawings (according to the UNI ISO standard) using CAD. The student acquires the theoretical bases for the analytical treatment of static and dynamic problems of material systems. The student learns the fundamentals of mechanics, forces and constraints, statics and dynamics of rigid bodies and mechanisms, equivalent force systems and the equilibrium.

Course contents

1. Elements of Mechanics (25 hours)
   • 1.1.Applied vectors and vector calculus
   • 1.2.Kinematics, Statics and Dynamics of points and rigid bodies
   • 1.3.Mass geometry
   • 1.4.Forces, work, energy
   • 1.5.Dissipative actions in contacts between bodies
   • 1.6.Machines and mechanisms
   • 1.7.Kinematics, Statics and Dynamics of constrained systems
   • 1.8.Examples and applications on mechanisms: slider and crank linkage, four-bar linkage
2. Elements of engineering drawing (10 hours)
   • 2.1.Introduction to engineering drawing
   • 2.2.Layouts of drawing sheets and types of lines
   • 2.3.Projection methods and orthogonal projections
   • 2.4.Sections and special conventional representations
   • 2.5.Dimensioning, dimensioning systems, special conventions for dimensioning
   • 2.6.Tolerance
   • 2.7.Surface roughness
   • 2.8.Special representations: threads, keys, spline couplings, gears
   • 2.9.Reading an assembly drawing
3. Foundamentals of CAD [PTC CREO] (25 hours)
   • 3.1.Parts: extrusion, revolution, holes; relations; material properties; feature repetitions
   • 3.2.Assemblies: rigid and kinematic constraints
   • 3.3.Kinematic, static, kinetostatic and dynamic simulation of mechanisms. Application to the four-bar linkage.
   • 3.4.Commercial components
   • 3.5.Drawing: views, projections, sections, dimensioning, detail. Bill of materials.

Readings/Bibliography

Professor's notes, provided through the "insegnamenti online" website.

Teaching methods

The course consists of two modules.

The first (35 hours) provides the main theoretical and practical bases and consists of lectures and exercises. The final purpose of the module is to provide the theoretical and computational bases for the kinematic, static and dynamic analysis of mechanisms. The main rules of industrial technical drawing are also provided.

The second module (25 hours) provides the basis for a CAD, through interactive lessons at the computer labs of the School of Engineering. The ultimate goal is to allow students to independently model and draw mechanical components and assemblies in a CAD, as well as simulate simple mechanical groups. To combine the theoretical and practical aspects, the simulations will be presented with references to the theoretical aspects of the first module.

To put the acquired knowledge into practice, a project will be assigned to groups of 5-8 students. The project will consist of the CAD modeling and assembly of the components of a small mechanical group, of which a cinematic, static or dynamic simulation must be also performed.

Assessment methods

EXAM

Oral and practical exam.

ORAL EXAM

It consists of three theoretical questions. The first one is the graphical kinetostatic analysis of a mechanism. The other questions are on any other theoretical content of Module 1. The mark is the arithmetic mean of the marks of the three questions and must be no lower than 15/30.

PRACTICAL EXAM

The student will be asked to present the group project correctly realized. Moreover, it will be asked to realize the drawing of a component, an assembly, a mechanical simulation or a drawing, similarly to what presented during the Module 2 lessons. The mark of the practical exam must be no lower than 15/30.

EXAM PROCEDURE

The oral and practical exams can be taken at different dates or sessions. The final mark will be the arithmetic mean of the two marks of the oral and practical exams. The exam is positive if this mark is no lower than 18/30.

Teaching tools

During the course some presentations will be used to support theoretical topics. The material is made available on the "Insegnamenti online" website.

Office hours

See the website of Nicola Sancisi