Karteikarten
Resistant Materials- 1.1 Material properties
Karten in diesem Stapel (22)
- 1What are physical properties?Properties of materials including fusibility, conductivity and environmental friendliness
- 2What are mechanical properties?Properties of materials including strength, hardness, density, durability, toughness/brittleness, malleability, ductility and elasticity. These properties are linked to how they react to the application of a force- e.g. by deforming in a temporary or a permanent way
- 3What is strength?The strength of a material is its ability to withstand an applied force without breaking or permanently bending.
There are different types of strength depending on the type of force being applied. - 4What are the 5 types of strength?Bending, torsion, shear, tensile, compressive,
- 5Bending? (What sort of strength is this?) P.S This one's pretty obvious, but even so, learn the exact definitionThe ability to withstand (or cope with) forces that are attempting to bend
- 6Define this type of strength: TorsionThe ability to withstand twisting forces
- 7Define this type of strength: ShearThe resistance to forces sliding in opposite directions
- 8Define this type of strength: Tensile (tension)The resistance to forces pulling in opposite directions
- 9Define this type of strength: Compression (compressive)The resistance to forces that are trying to crush or shorten
- 10What is malleability? Is it a mechanical or physical property?The ability of materials to be permanently deformed in all directions by the action of hammering, rolling or pressing.
It's a mechanical property (as it's linked to how a material reacts with the application of a force) - 11What is ductility? Mechanical or physical?The ability of a material to be cold deformed by being pulled or 'drawn' into smaller sections or wires without breaking
(Ductility in action: a wire can be pulled through a graded hole in a 'draw plate')
Mechanical - 12What is elasticity? Mechanical or physical?The ability to flex or bend when subjected to a force but regain normal shape when forces are removed
Mechanical
P.S. here's a virtual hug, for getting this far; \('3')/ - 13What is toughness? Mechanical or physical?The ability of materials to withstand sudden shocks or blows without breaking
Mechanical
(Fun fact: obvs hammers need this property) - 14What is brittleness? Mechanical or physical?The opposite of toughness. Where materials have little or no resistance to the application of a sudden force and break very easily.
(Fun fact: acrylic is p brittle, unless heated) - 15What is hardness? Mechanical or physical?The ability of a material to resist abrasive wear or scratching
Mechanical
(Cutting tools require this: files, saws and drills) - 16What is durability? Mechanical or physical?The ability to resist wear and tear e.g. over time, when some materials can start to weather suffer
- 17What is corrosion resistance?The ability of a metal to withstand the deterioration and chemical breakdown that occurs during surface exposure to a particular environment
Examples of this 'breakdown' include:
Rusting
UV light from the sun- which can cause brittleness in some plastics and can cause wood to deteriorate - 18What is density? Mechanical or physical?Basically, it's an object's weight and is defined as the mass per unit volume.
It often has an effect on other properties, such as hardness. - 19What is fusibility? Mechanical or physical?The ability of materials to change into a liquid material at a certain material.
This feature is important where materials need to be melted to carry out:
Fabrication processes (joining together of pieces, whether or not they are the same material) e.g. welding and soldering
Forming processes- such as casting and moulding - 20What is electrical conductivity?The ability to allow electricity to pass through a material
Good electrical conductivity (conductors): most metals- esp gold, silver and copper
Poor electrical conductivity (insulators): plastics, ceramics and wood
Semi-conductors (certain conditions make this normally poor conductor allow a current to flow through it): silicon - 21What is thermal conductivity?The ability to allow heat to pass through a material
Conductors (materials which have good thermal conductivity): metals
Insulators: non-metallic materials
These are used to prevent both heat loss and gain e.g. a polystyrene cup - 22What factors are involved in the property of environmental friendliness? Mechanical or physical?How easy a material is to reuse, recycle and biodegrade
Materials with a high level of environmental friendliness score highly in the above areas and this have no negative impact on the environment
Physical (it's inherent to the material)
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- GCSE CDT (Materials) Karteikarten am Resistant Materials- 1.1 Material properties, erstellt von fampulli am 25/05/2014.
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