composites 10043 final test

yes, they can be damaged

1. buffing 2. polishing

used so the part comes off the mould easily after curing. can be sprayed, brushed, wiped on

1. WAX “most common”, room temp only, use rag and buff 2. Poly vinyl alcohol “leaves slight texture, must be polished 3. Parting film “solvent resistant” dissolves in water, won’t shrink

1. perforated “allows air and volatiles out of the lay up, prevents bleeder from sticking to the part of repair 2. Parting film “solvent resistant, parting agent for polyester or expoxy resin, will not shrink” 3. peel ply “will stick to laminate, but will pull away without difficulty”. protective layer that peels away 4.solid release film

1. structural “not common for structural use” 2. cosmetic “void filling” 3. protection from water/uv “protects from water egress”

drawing

to achieve proper amount of strength of the part in correct directions

compacting / squeezing out air between the plies under moderate heat and or vacuum prevents wrinkles, promotes adhesion

de-bulking required when laying up complex or heavy section components: post cure wrinkles, squeegee, vacuum bag “is the compacting or squeezing out of air and volatiles between plies or prepreg laminates under moderate heat and vacuum. PREVENTS WRINKLES, promotes ADHESION

film adhesives

two relatively thin face sheets bonded to a relatively thick light core

room temp cure

false, they can’t be cured at room temp

help with repeatability, takes less time

1. brush 2. squeege 3. roller 4. vacuum assisted

to find the correct amount of resin mix needed to impregnate material

true, uniform cure is essential

so the correct amount of heat can be applied to the part curing

thermocouple

yes, can affect room temp cure

1. ramp up, soak, ramp down

1. supports part during curing 2. leaves smooth finish 3. more uniform heated area (hot monitor)

thermal arrest

detects delamination or disbond in composite structure

1. scorch 2. dent 3. abrade 4. stain 5. penetrate 6. chip

true, regulated by transport Canada

1. Laser 2. water jet

no, would contaminate honeycomb core.

laser

capable of being taken in by breathing, reaches deepest part of the lungs

wax

1. balsa 2. foam 3. honeycomb 4. aluminum 5. fibreglass 6. nomex

anisotropic

balsa

nomex/korex

light source, magnifying glass