Unit 4 (Ecological and Social Footprint, Forces and Stresses, Improving Funtionality, Scales of Production, The 6 R’s) Flashcards
Define global emissions
The process in which greenhouse gases are released into the atmosphere
Define carbon footprint
Amount of CO2 released as a result of individuals, organisations and communities
Define greenhouse effect
Where the heat from the sun cannot leave the atmosphere
Sources of CO2 emission
Drilling: extracting coal, sulphur and other minerals from the ground
Mining: extracting oil and natural gases from the ground
Deforestation: clearing wide are of trees
Farming: growing crops or livestock to meet consumer demand
Atmospheric pollution: emmission that cause air pollution
Oceanic pollution: poor waste management can lead to rubbish in sea
Product miles: total distance from source to consumer
Types of forces
Tension: a material is pulled apart
Compression: two materials presses together
Torsion: a material is twisted
Bending: a material is flexible
Shear: opposite forces that cut a material
What can be done to improve the functionality of a product
Folding and bending: can change structure or add flexibility
Strengthening and enhancing: combine or make something thicker. Use ribs, gussets or fillets
Reinforcing: metal frameworks used to increase tensile strength
Webbing: fabric that is used to reinforce products
Lamination and interfacing: materials that are bonded together
Are products only ever made stronger
No, some contain purposeful weaknesses
- plastic model making pieces
Types of production
One-off: a product for a specific use; can include prototypes
Batch: pattern, templates, jigs and CNC’s are used
Mass: a lot of automation, which can increase set up costs
Continuous: non-stop because there is constant demand
The 6 R’s include
REFUSE
RETHINK
REDUCE
REUSE
REPAIR
RECYCLE
What are the types of recycling
Primary: re-use without modification
Secondary: modify the product to respond to a different purpose
Tertiary: reprocessing materials
Upcycling: ‘revamp’ to celebrate past fashions
Define datum point
A common reference point in a component that can be used either as a (x, y, z) coordinate helping CAM, or even for manual use as a scale to obtain a greater accuracy