Machine design

Teacher(s)

Raucent Benoît; Servais Thomas (compensates Raucent Benoît);

Language

English

Main themes

Functional analysis of machines and their components
Properties of component
Elements of calculus of machine components.

Aims

At the end of this learning unit, the student is able to :
1	Specific learning outcomes of the course ·         Write  functional specifications for a machine ·         Identify the functionalities of a machine (actuation, bearing systems, transmission, sealing, ') ·         Estimate the installed and maximum power, the energetic consumption and the efficiency of a machine ·         Design a simple machine following an adapted methodology ·         Identify the basic hypotheses of elements dimensioning ·         Dimensioning  following  various  criteria  (yield  strength,  elastic  compliance,  fatigue)  of  usual elements (e.g. shafts) ·         Dimensioning while taking into account the effect of dynamic loading, stress concentration and residual stresses ·         Choose machine components (bearing, gasket, transmission) Read and interpret the drawing of an existing machine ·         Hand drawing of machine components and overall drawings ·         Placing tolerances for a mechanical system ·         Machine component design : threaded fastener and power screws, rivet and welding rolling bearing, sliding bearings,  clutches and brakes, power transmssion components (gears, belt, chains,  etc..), shaft and assocated part (key, pin, coupling, ') In consideration of the reference table AA of the program " Master's degree civil engineer mechanics ", this course contributes to the development, to the acquisition and to the evaluation of the following experiences of learning: AA1.1, AA1.2 AA2.1, AA2.2, AA2.3, AA2.4, AA2.5, AA2.6, AA2.7, AA2.8 AA4.3, AA4.4 AA5.1

Content

First part :functional analysis of machines and their components
·         Functional requirements (Specification conditions)
·         Principal functions of components (actuation, bearing systems , transmission) Origin of loads
Second part : properties of component use
·         Geometric characteristics
·         Tolerances and adjustments, shape tolerances, surface conditions, roughness and scale effects
·         Residual stresses
Third part : elements of calculus of machine components
·         Dimensioning  in relation to various failure criteria : elastic  buckling, plastic yielding, fatigue, while accounting for dynamic loads, stress  concentration, residual stresses, safety factors
·         Investigated components : threaded fastener and power screws, rivet and welding rolling bearing, sliding bearings, spur gears, helical, bevel and worn gears,  clutches and brakes, Power transmssion components (belt, chains,,  etc..), shaft and assocated part (key, pin, coupling, ')

Teaching methods

Due to the COVID-19 crisis, the information in this section is particularly likely to change.

The course are taught by PBL by groups of 6 students. A project on identification of tolerances is also part of the course.

Evaluation methods

Due to the COVID-19 crisis, the information in this section is particularly likely to change.

The students will be evaluated based on PBL and project reports and a written exam. The written exam will be led only on-site (presence mode). It contains exercises, theoretical questions and at least one drawing, the book "Fundamentals of Machine Component Design, R.C. Juvinall & K.M. Marshek, éd. J. Wiley and Sons "and the bearing catalogue are authorized, the book on technical drawing is not authorized.

Other information

All the information are given on Moodle

Bibliography

Suggested books (available at the BST library) :

Engineering Design Methods

N. Cross, ed. J. Wiley and Sons, 1991.
Materials Selection in Mechanical Design, M.F. Ashby, Butterworth-Heinemann.
This book is available on the web site of the BST library when connected to the UCL network, see:
http://www.sciencedirect.com/science/book/9781856176637
Aide Mémoire de l’ELEVE Dessinateur et du Dessinateur Industriel
M. Norbert et R. Philippe, La Capitelle, Casteilla, 1987.
Roulements FAG, roulements à billes, roulements à rouleaux, paliers, accessoires, catalogues WL 41 520 FA.
Mémotech, productique, conception et dessin, C. Barbier et R. Bourgeois, collection A. Capliez, Educative, ed. Casteilla, 1988.
Méthode Active de Dessin Technique, A Ricordeau, C. Corbet, C. Hazard, ed Casteilla (Ce livre est également obligatoire pour le cours LMECA_1210 et le cours de LFSA_1501).
Materials - Engineering, Science, Processing and Design, M. Ashby, H. Shercliff, D. Cebon, Butterworth-Heinemann.

Faculty or entity

MECA