Improving Functionality Flashcards
What do you do to enhance or strengthen a material?
consider the forces and stresses
consider the dynamic and static forces this give you an idea how much strengthening is required
How do designers not waste materiasl,energy and time?
work out the directions and the magnitude of forces that will potentially be applied of all parts of the product
What is reinforcing?
way of strengthening a material or an object by adding material to it to improve its ability to withstand force and stress
How is a car tyre reinforced?
tread-last for long time and expel water to it grips the roads and resists skidding
steel belts-added to resist punctures from sharp obkevts
What does the side wall do on a tyre?
reinforcement
side wall-layer to resist being bumped into kerbs and collapsing under weights of the car
What is a composite material and give an example?
when you combine two or more materials permanently
EG-reinforced concrete this is steel and concrete together
What are the properties of steel and concrete separately and when combined?
CONCRETE-brittle,can crack
STEEL-bends and flexes
STEEL + CONCRETE-more flex then concrete alone much safer and less prone to failure
What are metal rivets?
they are used in jeans and placed were a lot of fabric needs to be stitched together so more strength is needed to increase the overall tear resistance
What is the use of metal rivets?
allows the material to cope with added forces of the wearer constantly talking items in and out the pockets
What else can be used to strengthen jeans except metal rivets?
additional stitching is added to vulnerable areas such as belt loops and seams
What is webbing?
strong fabric woven into strips from yarn which are often made from synthetic fibres such as nylon or very high strength materials \9kevlar)
What are the uses of webbing/what are the properties?
USES-seatbelts, straps for securing loads on vehicle and climbing equipment
PROPERTIES-light,strong and flexible
How can you improve the strength of materials,fabric and the mechanical and physical properties?
MATERIAL-laminating
FABRIC-interfacing
MECHANICAL $ PHYSICAL-folding and bending
What is almination?
bonding two or more materials to improve product strength,stability and flexibility
How can wood be laminated?
use a former or mould to shape the material and then applying pressure hold it in its place
When is fabric interfacing used?
used in textile garments for an additional layer were extra structure is needed it ensure teh garment sists correctly in position
areas that are commonly interfaced are collars,cuffs and waistbands
What is the difference between fusible and sew-in?
FUSIBLE-(iron on) uses heat to bond it to the fabric
SEW-IN-sandwiched between layers of fabric and held into places with stitching
Give an example of interfacing?
baseball cap uses a heavy weight interfacing to keep its peak rigid
collar need greater flexibility so light weight interfacing
What can be added to material to add strength?
curves,tubes and arches this adds strength while using minimum amount of material
Give an example of folding and bending material to add strength?
Harry Thalers pressed chair
a single flat sheet of aluminium has been pressed using a relief before being folded
when folded its strength increases
What is a net?
flat 2 dimensional shape that can be folded and glued to form a 3 dimensional shape
What is the difference between score lines and cut lines?
CUT LINES:drawn solids and shows were material is cut from
SCORE LINES:dooted lines indicate where product should be folded
