m aterials selection practical workshops: session 1 henri-michel montrieux...
TRANSCRIPT
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CONTENT
Introduction Materials Selection for Bicycles Materials Selection for Springs Materials Selection for Car Radiator Materials Selection for Springs Starting with CES
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INTRODUCTION
(Fracture) Toughness
IS Unit? Physical aspect?Lower value of Kc?
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INTRODUCTION
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INTRODUCTION
ConsequenceWhat are materials with the best Kc/Re and Kc²/Re ratio?
When do we use respectively Kc/E and Kc²/E ?
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MATERIALS SELECTION FOR BICYCLES
Beams Wheel spokes
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MATERIALS SELECTION FOR BICYCLES (BEAMS)
Generally: Bending, shearing, compression, tension and torsion elements.
Here, simplified hypothesis : bending tubes only
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MATERIALS SELECTION FOR SPRINGS
Store elastic energy
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MATERIALS SELECTION FOR RADIATORS
Car radiator
House radiator
Material Copper Aluminium
Magnesium
Low alloy steel
Thermal conductivity (W/mK)
400 240 125 55
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MATERIALS SELECTION FOR RADIATORS
Objectif : Conduire la chaleur efficacement à travers les ailettes (longueur L, section S)
Loi constitutive :
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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
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MATERIALS SELECTION FOR CAR RADIATORS (HOUSE)
Incl. cost
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STARTING WITH CES
Simple exercise (group of 2 students)