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22 Cards in this Set
- Front
- Back
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What are composites? |
Composites are a combination of two or more materials. |
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What are the two kinds of composite materials (give at least 3 examples for each)? |
1. Natural Composite Materials - Wood, bone, ivory and teeth. 2. Synthetic Composite Materials - Concrete, reinforced concrete, glass-fibre-reinforced plastics/fibreglass and plywood. |
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Complete the equation: _______ + _______ = COMPOSITE |
MATRIX + FIBER (FILLER) = COMPOSITE |
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How are composites designed? |
They are designed to display a combination of the best characteristics of each material (e.g. fiberglass = strength from glass and flexibility of the polymer). |
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Describe how the matrix and filler work. |
They are either bonded together (with an adhesive) or mechanically locked together. |
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Give 5 examples on how composites are used in industries. |
- Bullet proof shields
- Medical tables - Pressure vessel and pipes - Turret shields - Automobiles - Industrial Spring |
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Describe what bones are made out of. |
Bones are made of tough, flexible fibres of protein and are embedded in hard cement. |
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What do you call the protein in bones? Is it the matrix or filler? |
Collagen is the filler of the bone. |
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What do you call the hard cement in bones? Is it the matrix or filler. |
Calcium phosphate is the matrix. |
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Concrete is consisting of ______ bound together by _________. |
Concrete consists of aggregate (filler) bound together by cement (matrix). |
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Cement is a mixture of two compounds. What are they? |
Calcium aluminate and calcium silicate. |
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When concrete sets, the particles bond and form a hard mass of crystals with trapped water molecules. What is this called? |
Water of crystallization |
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To improve the strength of concrete, steel rods/steel mesh is embedded in it. What is the result of this called? |
REINFORCED CONCRETE |
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What are the three names given for a composite material made of a polymer matrix and reinforced with fibres? |
1. Reinforced Plastic 2. Fibre-reinforced plastic (FRP) 3. Fibre-reinforced polymer |
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What can glass-fibre-reinforced plastics be used for? |
The hard, strong, light and resistant material is used for boats, surfboards and cars. |
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What can carbon-fibre-reinforced plastic be used for? |
Tennis rackets or golf clubs. |
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Composite fabrics are a combination of hard-wearing and easy care properties of ____________ with the texture and warmth of ___________. |
Composite fabrics are a combination of hard-wearing and easy care properties of SYNTHETIC FABRICS with the texture and warmth of NATURAL FABRICS. |
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True or False: Most clothes these days are made of composite fabrics. |
TRUE |
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Denim is a tough cotton fabric. What is the fibre combined with to give the tougher fabric the ability to stretch: a. Lycra b. Polyurethane c. Polyester |
A. LYCRA |
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What are materials combined in sheets? |
LAMINATES |
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Give three examples of laminates. |
1. safety glass 2. plywood 3. plasterboards |
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True or false: Each ply (for plywood) has its grain running at 80 degrees, to the next layer. |
FALSE. It is 90 degrees. |
