MATERIALS SELECTION

Practical workshops: Session 1

Henri-Michel Montrieux (hmmontrieux@ulg.ac.be)

CONTENT

Introduction Materials Selection for Bicycles Materials Selection for Springs Materials Selection for Car Radiator Materials Selection for Springs Starting with CES

INTRODUCTION

(Fracture) Toughness

IS Unit? Physical aspect?Lower value of Kc?

INTRODUCTION

INTRODUCTION

ConsequenceWhat are materials with the best Kc/Re and Kc²/Re ratio?

When do we use respectively Kc/E and Kc²/E ?

MATERIALS SELECTION FOR BICYCLES

Beams Wheel spokes

MATERIALS SELECTION FOR BICYCLES (BEAMS)

Generally: Bending, shearing, compression, tension and torsion elements.

Here, simplified hypothesis : bending tubes only

MATERIALS SELECTION FOR SPRINGS

Store elastic energy

MATERIALS SELECTION FOR RADIATORS

Car radiator

House radiator

Material Copper Aluminium

Magnesium

Low alloy steel

Thermal conductivity (W/mK)

400 240 125 55

MATERIALS SELECTION FOR RADIATORS

Objectif : Conduire la chaleur efficacement à travers les ailettes (longueur L, section S)

Loi constitutive :

MATERIALS SELECTION FOR CAR RADIATORS

Objective: Minimise mass

Material Copper Aluminium

Magnesium

Low alloy steel

Thermal conductivity (W/mK)

400 240 125 55

Density (kg/m³)

8900 2600 1800 7600

M 22.25 10.83 14.4 138.18

MATERIALS SELECTION FOR CAR RADIATORS (HOUSE)

Incl. cost

STARTING WITH CES

Simple exercise (group of 2 students)