Materials

rb.russell1
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Unit1: materials for OCR B incomplete

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rb.russell1
Created by rb.russell1 over 4 years ago
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Materials
1 Hooke's Law
1.1 tensile force
1.1.1 proportional
1.1.1.1 extension
1.1.1.1.1 if proportional limit not exceeded
1.1.1.2 F∝x
1.2 spring constant
1.2.1 gradient
1.2.1.1 units: N/m
1.2.1.2 steep
1.2.1.2.1 stiffer
1.2.1.3 shallow
1.2.1.3.1 stretchier
2 Young'd Modulus
2.1 Stress
2.1.1 F/A
2.1.1.1 tensile force
2.1.1.2 cross sectional area
2.1.1.3 units:N/m^2
2.2 Strain
2.2.1 x/L
2.2.1.1 extension
2.2.1.2 original length
2.2.1.3 no units
2.3 measure of elasticity
2.3.1 high
2.3.1.1 stiff
2.3.2 low
2.3.2.1 stretchy
2.4 Graph
2.4.1 up gradient
2.4.1.1 more stiff
2.4.1.1.1 brittle materials
2.4.1.1.1.1 no plastic deformation
2.4.1.1.1.1.1 breaks suddenly
2.4.2 for ductile materials
2.4.2.1 elastic region
2.4.2.1.1 obeys hooke's law up until
2.4.2.1.1.1 proportional limit
2.4.2.1.1.1.1 elastic limit
2.4.2.1.1.1.1.1 no return to original shape
2.4.2.2 yield point
2.4.2.2.1 tensile strength
2.4.2.2.2 large amount of plastic deformation
2.4.2.2.2.1 with constant/ reduced load
2.4.3 platic region
2.4.3.1 necking
2.4.3.2 break point
2.4.3.3 permanent deformation
3 Properties
3.1 strength
3.1.1 stress @ which material fails
3.1.1.1 ductile
3.1.1.1.1 premanent stretch
3.1.1.2 brittle
3.1.1.2.1 fracturing
3.2 ductile
3.2.1 easily
3.2.1.1 drawn into wire
3.3 tough
3.3.1 opposite
3.3.1.1 brittle
3.3.2 alot of energy
3.3.2.1 create new surface area
3.4 hard
3.4.1 resistant
3.4.1.1 scratching/cutting/abrasions
3.5 stiff
3.5.1 resistant
3.5.1.1 bending/stretching
3.6 malleable
3.6.1 easily shaped
4 Inside Materials
4.1 bonding
4.1.1 polymer
4.1.1.1 covalent bonds
4.1.1.1.1 strong
4.1.1.1.2 rotate
4.1.1.1.2.1 flexible
4.1.1.2 cross-links
4.1.1.2.1 if stong
4.1.1.2.1.1 rigid plastic
4.1.2 covalent
4.1.2.1 shared electrons
4.1.2.1.1 strong
4.1.2.1.1.1 directional
4.1.2.1.1.1.1 brittle
4.1.2.1.1.1.2 rigid
4.1.3 ionic
4.1.3.1 strong
4.1.3.1.1 directional
4.1.3.1.1.1 no slipping
4.1.3.1.1.1.1 brittle
4.1.3.1.1.1.1.1 rigid
4.1.4 metallic
4.1.4.1 free electrons
4.1.4.1.1 non-directional
4.1.4.1.1.1 allows rows to slip
4.1.4.1.1.1.1 ductile
4.1.4.1.1.1.2 tough
4.2 structures
4.2.1 polycrystalline
4.2.1.1 many grains
4.2.1.1.1 random orientations
4.2.1.1.2 crystals
4.2.1.1.2.1 uniform rows of atoms