Selecting materials l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 34

Selecting Materials PowerPoint PPT Presentation


  • 206 Views
  • Updated On :
  • Presentation posted in: General

Selecting Materials. Product function interdependence Mechanical properties Physical properties Families of materials Materials first screening. Customer Needs. Formulation. Customer requirements Importance weights Eng. characteristics House of Quality Eng. Design Spec’s .

Download Presentation

Selecting Materials

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Selecting materials l.jpg

Selecting Materials

  • Product function interdependence

  • Mechanical properties

  • Physical properties

  • Families of materials

  • Materials first screening


When do we select specific materials l.jpg

Customer Needs

Formulation

Customer requirements

Importance weights

Eng. characteristics

House of Quality

Eng. Design Spec’s

Concept Design

Abstract embodiment Physical principles

Material

Geometry

?

Configuration Design

When do we select specific materials?

arrangement of parts/features

(i.e. shaping materials)


Therefore let s examine l.jpg

Formulation

Concept Design

manufacturing processes

materials

Configuration Design

Parametric Design

Detail Design

Therefore, let’s examine…


Interdependence compatibility l.jpg

Interdependence - compatibility

Material

Properties

Manufacturing

Processes

compatible

materials & processes


Interdependence capability l.jpg

Interdependence - capability

capable processes

for the geometry

Manufacturing

Processes

Product

Geometry


Product function is interdependent l.jpg

Product function is interdependent

Material

Properties

Product

Function

Manufacturing

Processes

Product

Geometry


Example l.jpg

Example

Design a support for the electric motor

Tekniker-ILL neutron monochromator


Example8 l.jpg

Example

Tekniker-ILL neutron monochromator


Example9 l.jpg

Example

Tekniker-ILL neutron monochromator


Example10 l.jpg

Example

Tekniker-ILL neutron monochromator


Material properties l.jpg

Material properties

  • Mechanical properties

quantities that characterize the

behavior of a material in response to

external, or applied forces

  • Physical properties

quantities that characterize the

behavior of a material in response to

physical phenomena other than mechanical forces …(e.g. such as heat, electricity, radiation)


Mechanical properties l.jpg

ductile ?

brittle

elastic plastic

Mechanical properties

stiffness ?

Strength = stress at failure = (failure)


Mechanical properties13 l.jpg

Mechanical properties


Fundamental properties l.jpg

Fundamental properties


Fundamental properties15 l.jpg

Fundamental properties


Material families sub families l.jpg

Materials

Metals

Plastics

Ceramics

Composites

Family

(Ashby)

Ferrous

Thermoplastics

Thermosets

Non-ferrous

Sub-family

Elastomers

Material families / sub-families


Material sub families classes l.jpg

Family

Sub-family

Classes

Material sub-families / classes

Materials

Metals

Ferrous

Cast iron

Carbon steel

Alloy steel

Stainless steel


Metals l.jpg

Metals

Metals

Ferrous

Non-ferrous

cast iron

carbon steel

alloy steel

stainless steel

aluminum

brass

bronze

copper

lead

magnesium

nickel

tin

titanium

tungsten

zinc


Polymers l.jpg

Polymers

Thermoplastics

Thermosets

Elastomers

ABS

acetal

acrylic

nylon

polycarbonate

polyethylene

polypropylene

polystyrene

vinyl

alkyd

epoxy

melamine

phenolic

polyester

urethane

butyl

fluorocarbon

neoprene

nitrile

polysulfide

rubber

silicone

Natural and synthetic rubbers

Polymers


Polymers20 l.jpg

Polymers

No chemical reaction

Cross-linking


Ceramics l.jpg

Ceramics

alumina

beryllia

diamond

magnesia

silicon carbide

silicon nitride

zirconia

Ceramics


Composites l.jpg

Composites

carbon fiber

ceramic matrix

glass fiber

Kevlar

metal matrix

Composites


Composites23 l.jpg

Composites

Manufacturing process

Carbon fiber Style 282 bidirectional.

Araldite epoxy resin with HY956 additive.


Composites24 l.jpg

Composites

College Park Foot

Otto Bock Advantage

Ossur Flexwalk

Pie protésico dinámico2004

Pie protésico dinámico2005


Composites25 l.jpg

Composites

Marlon

Shirley

Ossur

Cheeta

Flex-Foot

Cameron

Clapp

Otto Bock

C-Leg

Date of birth: April 21, 1978 Hometown: Thatcher, Utah Current Home:San Diego, CA

Date of birth: Sep 15, 1986


Property profiles by family l.jpg

Property profiles by family


Materials selection l.jpg

Materials selection

prospective

materials and processes

rejected

materials and processes

functional?

manufacturable?

screening

feasible

materials and

processes

relative

performance?

rating

best

material(s) and processes


Screening how do we choose a material l.jpg

Screening: How do we choose a material?

Product function depends upon…

material, manufacturing process, geometry

We have to consider all three

  • Do we select a few feasible materials first…

    then select the specific mfg process?

    or

  • Do we select a few feasible mfg processes…

    then select the specific material?


Screening materials first approach l.jpg

Screening: Materials first approach

Application Information

  • Applied loads

    magnitude

    cyclic nature (steady, fatigue)

    rate (slow, impact)

    duration (creep)

  • Ambient conditions

    temperature

    moisture

    sunlight

    chemical liquids/vapors

  • Safety

  • Cost


Screening manufact process first approach l.jpg

Screening: Manufact process first approach

  • Part Information

  • Production volume

  • Part size (overall)

  • Shape capability (features)

    • boss/depression 1D

    • boss/depression >1D

    • holes

    • undercuts (internal/external)

    • uniform walls

    • cross sections (uniform /regular)

    • rotational symmetry

    • captured cavities


Materials selection31 l.jpg

Materials selection

prospective

materials and processes

rejected

materials and processes

functional?

manufacturable?

screening

feasible

materials and

processes

relative

performance?

rating

best

material(s) and processes


Rating material indices l.jpg

Rating: Material indices

  • Given the same cost/volume… which is stronger?

    index = Strength/cost

  • Given the same cost/volume… which is stiffer?

    index = Young’s modulus/cost


Ashby chart l.jpg

AshbyChart

How can we use it?


Summary l.jpg

Summary

  • Product function interdependence

  • Mechanical properties

  • Physical properties

  • Families, sub, classes of materials

  • Ashby charts

  • Materials first approach

  • Process first approach


  • Login