# 87253 - Computer Aided Design of Mechanical Structures m

### Course Unit Page

• Teacher Francesco Cesari

• Credits 6

• SSD ING-IND/15

• Language Italian

• Teaching Material

• Course Timetable from Sep 18, 2018 to Dec 17, 2018

## Learning outcomes

Knowledge and skills to be achieved The course provides basic knowledge for the use of structural calculation programs based on the finite element method (MEF). We study frame structures, two - dimensional structures flat and axialsymmetric behavior, the three - dimensional structures schematized with solid and shell elements. Simple problems are faced and solved with the use of both MEF and traditional methods.of construction science and the theory of elasticity, with a critical discussion on the comparison of the results obtained. Particular attention is placed in the modeling of the organs of the machines for the choice of the the most appropriate model for assessing structural behaviour through certain programmes for the resolution and presentation of the results made available by the teacher. Other numerical methods such as the finite difference method and the Finite volume method as a tool to deal with thermal transients, dynamic problems and the motion of fluids.

## Course contents

Analytical solution of structures subject to mechanical and thermal loads -Straight and single - bent beams -thick tubes and balls -O - Ring Slabs -cylindrical plates -hints on the theory of elasticity
Numerical solution of structures Numerical methods for solving a mechanical structure Matrix calculation of structures and finite element method
Analysis of the most common elements One - dimensional elements -The finished element C0 : rod, tube -Finished element C1 : beam, circular and cylindrical slab Two - dimensional elements -The two - dimensional finished element C0 -The finished element C1e C0 slab Hints on the solid element and shell
Composite materials : classification The composite materials short fiber and long fiber. Analysis of a lamina. Elastic Constants of a Foil. Laminate analysis.

F. Cesari, V. Dal Re, P. Morelli, Esercizi di meccanica delle strutture, Esercizi di base, Vol. 1, Pitagora
F. Cesari, Esercizi di meccanica delle strutture, Esercizi avanzati, Vol. 5, Pitagora

F. Cesari, Introduzione al metodo degli elementi finiti, Vol. 1, Pitagora

F. Cesari, Calcolo matriciale delle strutture, Vol. 2, Pitagora
F. Cesari, Esercizi di meccanica delle strutture, Il MEF, Vol. 6, Pitagora

G. Caligiana, F. Cesari, Materiali compositi, Pitagora
F. Cesari, F. Tornabene, Esercizi di meccanica delle strutture - Materiali compositi, Pitagora

## Teaching methods

The frontal lessons in the classroom are held on the blackboard as far as the theoretical part is concerned. The exercises that are carried out and proposed are set and solved with the computer. Frequency is recommended for a better learning of concepts and notions, but not has an impact on the final evaluation process.

## Assessment methods

During the lessons there are exercises proposed to be done with the computer and to be presented on a examination book, which will be held orally with a discussion on the work carried out. The number of exercises varies between 20 and 30 depending on the difficulty.The workbook may be completed by even by a group of students, not more than three.

The minimum mark 18/30 to pass the exam is assigned verifying the knowledge of all the basic arguments and if there are no gaps in construction science, and machine building. The vote in the case of working groups can be individual in the case of large differences in preparation or mediation for a common preparation

## Teaching tools

The reception takes place weekly on Wednesday morning. On the same day you can also take the exam after warning the teacher by e - mail.

## Office hours

See the website of Francesco Cesari