As the ceaseless development of industry of automobile of new energy resources, quantify a requirement gently to the car increasingly heighten. In numerous material, carbon fiber composite material compares intensity exceedingly goodly with its, than stiffness, anti-corrosive reach fatigue resistance to be able to be people place to take seriously increasingly. And the different characteristic between carbon fiber material and metallic stuff, also designed personnel to offer different design train of thought for the project, the characteristic of composite material of the following will simple comparative carbon fiber and traditional metal and otherness. 01 mix than stiffness than intensity
Comparative metal stuff, weight of carbon fiber material is light, reach than intensity taller than stiffness. Next watches give out orthogonal lay up (Cross-Ply) fiber composite material follows groovy stuff the comparison of mechanical function. Can see in modular quantity and intensity respect tradition carbolic steel is behaved first-rate, but density is affected badly greatly light quantify application. The modular quantity with 6 aluminous departments and intensity are less than carbolic steel, but its density is lesser. And the model measures colophony radical carbon fiber prep above aluminium alloy, intensity can reach level of excel in steel through the design, far outclass aluminium alloy, mix in function light quantify two sides dominant position very apparent.
02 can design a gender
Metallic stuff shows each same sex normally, have succumb or the condition succumbs phenomenon. And monolayer carbon fiber is had apparent directional. Direction of lamina edge fiber is mechanical function of perpendicular fiber direction and freely cut function prep above function 1~2 volume level, and curve of stress meet an emergency shows line flexibility before rupture concern. Accordingly, carbon fiber material can adopt layer plywood theory, the laid actor that chooses monolayer, lay up comparing, lay up is ordinal. Can distributing according to load characteristic, specific aim design will acquire need stiffness and intensity property, and traditional metal stuff can be passed only add thick will come true. In the meantime, layer plywood function cuts out the design can acquire the stiffness inside needs range and intensity property not only, still can win distinct range inside with the between coupling stiffness outside the face.
03 corrosion resistance
Compare at metallic stuff, carbon fiber material is had very strong be able to bear or endure the ability that soda acid corrodes. Carbon fiber is the microcrystalline structure of the crystal of similar black lead that processing of graphitization of high temperature of course 2000—3000 ℃ forms, itself of this kind of structure is had very tall be able to bear or endure medium is caustic, in the hydrochloric acid that is as high as 50 ％ , vitriolic perhaps can be in in phosphoric acid the respect such as stretch model quantity, intensity and diameter keeps basically invariant. Accordingly, as enhance material for, carbon fiber is in corrosion resistance can the respect has enough assurance, different matrix colophony is distinguished somewhat on corrosion resistance. Enhance epoxy resin like common carbon fiber base, of epoxy resin be able to bear or endure it is better to await a gender, still can better land retains strength. 04 fatigue resistance
The fatigue and characteristic main influencing factor of carbon fiber composite material is to reduce meet an emergency and level of tall meet an emergency. Fatigue function undertakes — is pressed pressing normally (R=10) and pull — to press (R=-1) fatigue experiment, and metallic stuff undertakes R=0.1 commonly pull — to help fatigue test. Compare at metallic spare parts, especially aluminium alloy, carbon fiber spare parts has superior fatigue performance. The domain with fatigue resistance higher demand waits in car batholith, carbon fiber composite material has better applied advantage. At the same time carbon fiber material is put in cut effect scarcely. Layer plywood is in most carbon fiber whole life period inside, the S-N curve that has cut test and the S-N curve that experiment without cut are identical. 05 can reclaim quality
At present mature carbon fiber matrix uses resin of hot solid sex, extract very hard again after solidify cross-linking use, cause bigger effect to the environment. It is difficult that accordingly carbon fiber reclaims one of bottleneck that are industrial development, also be the technical a hard nut to crack that large-scale application earnestly wants to solve. At present domestic and international much winds debit way general cost is higher, hard industrialization. China special carbolic fine is being explored actively can reclaim makings solution, already finished the trial-produce of many sample, reclaim the result is favorable, have a quantity to produce a condition.
Compare traditional metal data, carbon fiber material is in quantify mechanical function, gently, advantaged advantage can be had on design sex, fatigue resistance, but, it is its production efficiency, difficult to reclaim remain the bottleneck place that restricts its to apply further. Believe as technology, craft the respect breaks through innovation, carbon fiber can obtain more and more application in car admiral.
