2nd appointment

Material Selection

and

Process

3/24/2011 hadisaputra@live.com

Materi 1

• Konsep Design

• Case study proses design

• Evolusi material Teknik

• Klasifikasi Material Teknik

• Sifat-sifat Material Teknik

• Komposisi Paduan

• Case study Pemilihan Material untuk kaki meja

3/24/2011 hadisaputra@live.com

Product Design

3/24/2011 hadisaputra@live.com

Material Selection and Process –Ashby-IstDesign flow Chart

3/24/2011 hadisaputra@live.com

3/24/2011 hadisaputra@live.com

Case Study Design Product: Vacuum Cleaner

• 1. Need devices to remove dust from carpets in Home

• 2.Concepts• A Vacuum

• Air Compressor

• Adhesive Belt

• Brush It Out

• Draw it Out Electrostatically

Choose a Vacuum Methods

Specification :- Power source is electrical- Vacuum Pump- A Filter to Catch the dust- A pipe to direct action of pump to the carpets

3/24/2011 hadisaputra@live.com

• 3. Embodiment

• More Detail Calculation of :

• Law Rates

• Pump Design

• Form of Filter

• Diameter Length of Tube

• The Casing

• The Control

• How to Integrating All

- A Layout diagram- Estimate Power- Weight & performance

3/24/2011 hadisaputra@live.com

• 4. Detail Design• Pemilihan Material tiap komponen

• Pemilihan standart part untuk tiap komponen.

• Komponen yang bukan standart part perlu analysis lebih lanjut , misal : Finite Element Analysis, Air Flow, dll

• Production Methods– Predefine prosess tiap komponen

– Predefine alternatif cost tiap komponen

• Shape, Texture, and Color of external surface by other Engineer

Complate a set of Engineering Drawing and Production specifications

3/24/2011 hadisaputra@live.com

3/24/2011 hadisaputra@live.com

Klasifikasi Material Teknik

• Metals– Steels, Cast irons, Al Alloys , Cu-Alloys,

Zn-Alloys, Ti-Alloys

• Polymer– PE, PEEK, PP, PET, PC, PS, PA (Nylons),

Polyesters, Phenolics , Epoxies

• Glasses– Soda Glass, borosilicate glass, silica

glass, glass-cermics

• Elastomers– Isoprene, Neoprene, butyl rubber,

natural rubber, Silicon

• Composites– Composite, Shandwich, Segmented

structures, Lattices, weaves

3/24/2011 hadisaputra@live.com

Klasifikasi Ferrous metal

3/24/2011 hadisaputra@live.com

Sifat-sifat Material Teknik

Properties of

Materilas

Physical Properties

Density, melting point, optical, thermal,

coefisient of conductivity, magnetic properties

Mechanical Properties

Statics properties

Dynamic properties properties

Temperature Effercts

Machinability, Formability, Weldability

Fracture Toughness and The fructure Mechanics

approch3/24/2011 hadisaputra@live.com

Sifat-sifat Bahan Teknik

• Static Properties– Tensile Test– Ductility and Britellness– Toughness berkaitan dengan

impact or shock loading– Damping Capacity kapasitas

absorbed vibration eg cranksahft– Compression testing– Hardness testing, eq. Brinell,

Rockwell, Vickers

• Dynamic properties– Impact Test– Fatigue and Endurance

Limit

• Temperature effect– Contohnya pada konstruksi pesawat,

space vehicles, gas turbin, and nuklearpower plant, are required operated under temp. as low as -130 C or as high as 1250 C

– Elevated Temp. usefull in modify the strength and ductility of materials. Fig. 2-29 • Machineability, Formability, and

weldability

• Fracture toughness and Fracture mechanics approach

Atomic Bonds

Secondary Bonds

van derWaals Forces

Primary Bonds

Ionic Bonds

Covalent Bonds

MetalicBonds

Ikatan Atom

3/24/2011 hadisaputra@live.com

Crystal Structures of Metals

Structures unit cell :

• BCC

• FCC

• HCP

• Crystal system :• Cubic

• Hexagonal

• Tetragonal

• Rhombo

• Ortho

• Monoclinic

• Triclinic

3/24/2011 hadisaputra@live.com

Unsur-Unsur Paduan Bahan teknik

Alloys

CompositeTwo Type of building

Blocks in intimate mechanical mixture

The two elements exhibet some

degree of solubility in the solid state

Substitusional

Interstistials

Elements combine to form

intermetalliccompounds

Ionic dancovalent

3/24/2011 hadisaputra@live.com

Center Problem in Material selection

3/24/2011 hadisaputra@live.com

3/24/2011 hadisaputra@live.com

3/24/2011 hadisaputra@live.com

Strategy To Choose Material

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Material Chart

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Case Study : Material Selection for Table Leg (ashby , page 71)

3/24/2011 hadisaputra@live.com

Tugas ?•Mahasiswa Mencari

–1. Klasifikasi Baja?

–2. Kodefikasi Baja?

–3. Unsur-unsur paduan baja?

3/24/2011 hadisaputra@live.com

References

• Materials and Processes in Manufacturing, E. Paul Degarmo

• Materials Selection in Mechanical Design, Ashby

3/24/2011 hadisaputra@live.com