Chapter 12: Composite Materials Flashcards
How much force in tension can composite materials hold compare d to steel materials?
15,000 lbs tension for steel
25,000 lbs tension for carbon fiber
What are the advantages to carbon fiber?
light weight
stronger
can arrange the fibers in one direction for extra strength
What are the disadvantages?
high cost to produce
complex
What is the schedule of carbon fiber?
a tool in determining what angle to lay the fiber to prevent warping.
creates a BALANCED and SYMMETRICAL material
What is the strongest method of the schedule?
more distance between lines in the same directions
What is the least ratio for resin to fiber?
50% fiber, 50% resin
How do you pull out the resin?
a vacuum bag
Relate the pressure in a vacuum bag to pulling our the resin.
the higher the pressure, the more resin is pulled out, so the less remains, and makes the material stronger and lighter (up to a point)
What are the general layers to carbon fiber?
mold laminate peal ply/perforated film bleeder separator breather vacuum
What are composites?
compound of materials (two or more materials combined)
fibers
matrix
What are the purposes of fibers and the matrix?
fibers - carries out majority of the load
matrix - gives the part is shape, protects the fibers
What is the purpose of the time clock?
to ensure that the laminate is balanced and symmetric
What is the vacuum bag schedule layout?
vacuum on top, breather, separator, bleeder, peel ply or perforated film, laminate, sealant tape around the outside and the mold
What is the worst bleeder schedule and the best bleeder schedule to use?
worst - vacuum bag with no breather
best - polyester peel ply,
