Properties Flashcards
What is the difference between physical and mechanical properties?
Physical - the properties that a material already has (density, melting points)
Mechanical - something that is found from a mechanical method ( hardness and strength)
What are thermal and electrical conductivity?
Ability to pass on heat/electricity as either a conductor or insulator
What is the definition of hardness?
Ability to resist permanent indentation
The harder the material is, the greater resistance to wear and deformation
What is the definition of density?
The measure of heaviness for a given size
What is the definition of toughness?
The ability to absorb energy & deform without rupturing, fracturing or failing
What is the definition of ductility?
The ability to sustain large permanent deformation under tension to the point of fracture
OR
The ability to be stretched plastically at room temperature without failing
What is the definition of elasticity?
The ability to return to its original shape once the deforming forces have been removed
What is the definition of Durability?
The ability to withstand wear or damage
What is the definition of tensile strength?
The ability to withstand a pulling force without stretching
What is the definition of compressive strength
The capacity that a material can withstand compressive stress without fracturing
What is the definition of malleability?
The ability to be formed or shaped without breaking
Other than mechanical and physical, what other properties are there?
- Chemical
- Thermal
- Magnetic
- Acoustic
- Optical
What properties are usually associated with natural timbers?
Durability, strength, hardness, toughness and elasticity
What type of products would a designer avoid using timbers for?
Products that require heat and electrical conductivity as timbers are good insulators
What properties are associated with manufactured boards?
Block board is durable, good insulators
