Design Materials
What you see - What you get
Design materials
• Function is supreme – Perform to requirements
– Durability – life span
– Product life cycle
Material Properties
• Physical
• Mechanical
• Chemical
• Acoustical
• Optical
• Thermal
Physical Properties
• Characteristics free from external influence– Melting point
– Density
– Moisture content
– Porosity
– Texture
– Phase
– Hardness
– Odor
Mechanical Properties
• Tensile• Compression• Torsion• Shear• Plasticity• Yield• Hardness• Ductility
Chemical Properties
Corrosion Resistance
Acid/Alkali resistance
UV tolerance
Human poison
Acoustical
• Sound attenuation• Reflection
Acoustical
Architectural considerations
Thermal
• Effects of Temperature• Insulation• Conductivity
Optical
Reactions to light
Color
Transparency
Tones
Shades
Metals
• Ferrous • Nonferrous
Steel
Iron and Carbon
Wrought
Stainless
Copper Alloys
• Copper• Bronze• Brass
The Rest
• Zinc• Magnesium• Titanium• Monel• Refractory
– Molybdenum
– Tantalum
– Tungsten
Plastics
Coal, Tar, Petroleum, Milk, Wood, Soy
Plastics
• Thermosetting• Thermoplastic
Basic Types
• Hardwood– Stronger– Bold grain patterns– Toughness
• Softwood– Easy to machine– Less expensive– Provide contrast– Manmade products
Ceramics
• Non metallic• Inorganic
• High temperatures to manufacture
• Plastic before firing
Good tensile strength
High compressive strength
Chemically resistant
High dielectric properties