Material Selection and Process - · PDF fileProduct Design 3/24/2011 [email protected]....
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Transcript of Material Selection and Process - · PDF fileProduct Design 3/24/2011 [email protected]....
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 [email protected]
3/24/2011 [email protected]
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 [email protected]
• 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 [email protected]
• 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 [email protected]
3/24/2011 [email protected]
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
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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 [email protected]
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
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Crystal Structures of Metals
Structures unit cell :
• BCC
• FCC
• HCP
• Crystal system :• Cubic
• Hexagonal
• Tetragonal
• Rhombo
• Ortho
• Monoclinic
• Triclinic
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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 [email protected]
3/24/2011 [email protected]
3/24/2011 [email protected]
Tugas ?•Mahasiswa Mencari
–1. Klasifikasi Baja?
–2. Kodefikasi Baja?
–3. Unsur-unsur paduan baja?
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References
• Materials and Processes in Manufacturing, E. Paul Degarmo
• Materials Selection in Mechanical Design, Ashby
3/24/2011 [email protected]
