# MECHANICAL MODELS FOR DESIGN

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Versione italiana
2020/2021
Teacher
CLAUDIO ALESSANDRI
Credits
6
Didactic period
Secondo Semestre
SSD
ICAR/08

#### Training objectives

The Course, as the first introduction to the Mechanics of Materials and Structures, has the following goal :

- to provide the mathematical – physical tools and the basic mechanical models for a correct design of artefacts and prototypes for Industry, such as to meet the requirements of strength, stability and functionality at the same time.

#### Prerequisites

Students must have familiarity with the Mathematics and Physics of the High School.

#### Course programme

SI measure units, global and local reference systems

Basic elements of Vector Analysis

Concepts of Force, Moment of Forces, displacements and rotations, work and their representation in terms of Vectors

The fundamental laws of Mechanics

Rigid bodies and the fundamental laws of Statics

2-D and 3-D external and internal constraints; relationships between mechanical representation and technological features

Elements of Geometry of Masses; center of masses, static moment, moments of inertia and related properties

Structure as bearing body

Equilibrium of rigid bodies and rigid body systems

Deformability

Tension and Strain

Material elastic, linear elastic, plastic and fragile behaviors by means of diagrams of axial experimental tests

Homogeneity, isotropy, orthotropy, anisotropy, ductility, fragility, hardness, tenacity, resilience, creep, fluage

Determinate and indeterminate structures

One-dimensional models for the analysis of statically determinate structures

Constraint reactions

Elementary and combined internal forces: tension, compression, bending, compression and bending, shear, torsion

Influence of temperature on material behavior: thermal conductivity and thermal expansion

Basic concepts of structural instability

Simple checks on material strength by means of the admissible tension Method

Relationship shape-structure, shape - strength

Structural typologies and their strength based either on mass or shape

Presentation of works carried out by students in previous academic years

#### Didactic methods

Direct lectures. The topics of the Course are presented in their main features and with their relationships with the present trend of the Industrial Design. The theoretical parts of the Course are always followed by applications to specific case studies.

#### Learning assessment procedures

The level of achievement of the main objectives of the Course is evaluated by a final test consisting of:

Compilation of a questionnaire containing multiple choice questions on the theoretical and practical topics of the course

The exam is considered as passed if an adequate number of correct answers have been provided

#### Reference texts

Basic bibliography:

- Lecture notes and educational material in the course web page

- Works carried out by students of the previous years

- Materiali per il Design – Introduzione ai materiali e alle loro proprietà. A cura di B. Del Curto e C. Marano. Casa Editrice Ambrosiana. ISBN 978-88-08-18400-9

- STATICA applicata alle costruzioni, L. Boscotrecase & A. Di Tommaso, Patròn Ed.

- Introduzione alla Meccanica delle Strutture per il Design, Antonietta Campanella , ARACNE Ed., 2014, ISBN-13: 978-8854879331