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Cov ntaub ntawv sib xyaw yog dab tsi? Yuav ua li cas txog kev ua haujlwm?

Views:5 Author: Linda Tshaj Tawm Sijhawm: 2023-08-01 keeb kwm:

Feem ntau siv cov ntaub ntawv sib xyaw ua ke yog tsim los ntawm kev ua haujlwm qis xws li iav fibers thiab cov polymers zoo tib yam (resins). Vim nws qhov zoo ntawm cov duab yooj yim, zoo thiab tus nqi qis, nws tau tsim muaj zog heev. FRP cov ntaub ntawv sib xyaw tau siv dav hauv kev kho kom zoo nkauj, khoom siv tes ua, nkoj, tsheb, cov kav dej tshuaj thiab cov tso tsheb hlau luam, cov khoom siv hauv tsev, thiab lwm yam.

Cov ntaub ntawv sib xyaw ua ntej xa mus rau cov ntaub ntawv sib xyaw ua los ntawm cov khoom siv ua haujlwm siab xws li carbon fibers, aramid fibers, thiab lwm yam, uas yog cov khoom siv hluav taws xob ua haujlwm siab, thiab tom qab ntawd suav nrog hlau-raws li, ceramic-based, carbon (graphite)- Raws li thiab cov khoom siv sib xyaw ua haujlwm. Txawm hais tias lawv cov kev ua tau zoo heev, lawv cov nqi kuj yog siab heev, thiab lawv tsuas yog siv rau hauv kev lag luam tiv thaiv, aerospace, precision machinery, sib sib zog nqus submersibles, neeg hlau yam ntxwv, thiab lwm yam.

kev sib xyaw 1

                    Ntawm cov ntaub ntawv sib xyaw, cov khoom siv fiber ntau yog cov khoom siv dav thiab siv ntau tshaj plaws. Nws yog tus cwj pwm los ntawm qhov tshwj xeeb me me, lub zog tshwj xeeb loj thiab qhov tshwj xeeb modulus. Piv txwv li, cov khoom sib xyaw ntawm cov roj carbon fiber ntau thiab epoxy resin muaj ob peb zaug loj dua lub zog thiab cov qauv tshwj xeeb tshaj li cov hlau thiab txhuas alloy, thiab tseem muaj tshuaj lom neeg ruaj khov, hnav tsis kam, nws tus kheej lubrication, kub tsis kam, qaug zog tiv thaiv, thiab creep kuj. . , txo suab nrov, hluav taws xob rwb thaiv tsev thiab lwm yam khoom. Kev sib xyaw graphite fibers nrog cov resins tuaj yeem ua rau cov ntaub ntawv nrog cov coefficient ntawm thermal expansion yuav luag sib npaug rau xoom. Lwm qhov tshwj xeeb ntawm cov khoom siv fiber ntau yog anisotropy, yog li kev npaj ntawm fibers tuaj yeem tsim raws li lub zog xav tau ntawm ntau qhov sib txawv ntawm ib feem. Aluminium matrix composites ntxiv dag zog nrog carbon fibers thiab silicon carbide fibers tseem tuaj yeem tuav lub zog txaus thiab cov qauv ntawm 500 ° C. Silicon carbide fiber ntau yog ua ke nrog titanium, uas tsis tsuas yog txhim kho cov cua sov ntawm titanium, tab sis kuj yog hnav-resistant, thiab tuaj yeem siv los ua lub tshuab kiv cua. Silicon carbide fibers tau ua ke nrog ceramics, thiab qhov kev pabcuam kub tuaj yeem ncav cuag 1500 ° C, uas yog siab dua li ntawm superalloy turbine hniav (1100 ° C). Cov pa roj carbon fiber reinforced carbon, graphite fiber-reinforced carbon los yog graphite fiber-reinforced graphite yog cov ntaub ntawv ablation-resistant thiab tau siv nyob rau hauv spacecraft, foob pob ua ntxaij missile thiab atomic zog reactors. Vim tias lawv cov ntom ntom tsawg, tsis yog xim hlau sib xyaw tau siv hauv cov tsheb thiab cov dav hlau los txo qhov hnyav, nce nrawm, thiab txuag lub zog. Composite nplooj springs ua los ntawm kev sib xyaw ntawm cov pa roj carbon thiab iav fibers muaj tib lub zog thiab lub peev xwm thauj khoom xws li steel nplooj springs uas muaj ntau tshaj tsib zaug hnyav dua.


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