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Flashcards by T Andrews, updated more than 1 year ago
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Created by fampulli
over 10 years ago
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Copied by T Andrews
almost 8 years ago
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| Question | Answer |
| What are physical properties? | Properties of materials including fusibility, conductivity and environmental friendliness |
| What 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 |
| What 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. |
| What are the 5 types of strength? | Bending, torsion, shear, tensile, compressive, |
| Bending? (What sort of strength is this?) P.S This one's pretty obvious, but even so, learn the exact definition | The ability to withstand (or cope with) forces that are attempting to bend |
| Define this type of strength: Torsion | The ability to withstand twisting forces |
| Define this type of strength: Shear | The resistance to forces sliding in opposite directions |
| Define this type of strength: Tensile (tension) | The resistance to forces pulling in opposite directions |
| Define this type of strength: Compression (compressive) | The resistance to forces that are trying to crush or shorten |
| What 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) |
| What 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 |
| What 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')/ |
| What 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) |
| What 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) |
| What 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) |
| What is durability? Mechanical or physical? | The ability to resist wear and tear e.g. over time, when some materials can start to weather suffer |
| What 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 |
| What 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. |
| What 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 |
| What 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 |
| What 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 |
| What 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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