xov xwm

Fiberglass Reinforced Polymer (GFRP)yog ib yam khoom siv ua tau zoo uas ua los ntawm cov iav fibers ua tus neeg sawv cev txhawb zog thiab cov polymer resin ua lub matrix, siv cov txheej txheem tshwj xeeb. Nws cov qauv tseem ceeb muaj cov iav fibers (xws liE-iav, S-iav, lossis lub zog siab AR-iav) nrog txoj kab uas hla ntawm 5 ~ 25μm thiab thermosetting matrices zoo li epoxy resin, polyester resin, lossis vinyl ester, nrog rau cov fiber ntim feem ntau ncav cuag 30% ~ 70% [1-3]. GFRP qhia txog cov khoom zoo heev xws li lub zog tshwj xeeb tshaj 500 MPa / (g / cm3) thiab cov modulus tshwj xeeb tshaj 25 GPa / (g / cm3), thaum tseem muaj cov yam ntxwv xws li kev tiv thaiv corrosion, kev tiv thaiv qaug zog, cov coefficient qis ntawm thermal expansion [(7 ~ 12) × 10 - 6 ° C - 1], thiab electromagnetic transparency.

Hauv kev lag luam aerospace, kev siv GFRP pib xyoo 1950 thiab tam sim no tau dhau los ua cov khoom siv tseem ceeb rau kev txo qhov hnyav ntawm cov qauv thiab txhim kho kev siv roj. Piv txwv li, Boeing 787, GFRP suav txog 15% ntawm nws cov qauv tsis yog thawj qhov hnyav, siv rau hauv cov khoom xws li fairings thiab winglets, ua tiav qhov hnyav txo ntawm 20% ~ 30% piv rau cov hlau txhuas ib txwm muaj. Tom qab cov kab hauv pem teb ntawm Airbus A320 tau hloov nrog GFRP, qhov hnyav ntawm ib qho khoom txo qis los ntawm 40%, thiab nws cov kev ua tau zoo hauv cov chaw noo noo tau zoo dua. Hauv qhov chaw dav hlau, cov vaj huam sib luag sab hauv ntawm Sikorsky S-92 lub tsev siv cov qauv GFRP honeycomb sandwich, ua tiav qhov sib npaug ntawm kev tiv thaiv kev cuam tshuam thiab nplaim taws retardancy (ua raws li tus qauv FAR 25.853). Piv rau Carbon Fiber Reinforced Polymer (CFRP), tus nqi khoom siv raw ntawm GFRP raug txo los ntawm 50% ~ 70%, muab qhov zoo dua rau kev lag luam hauv cov khoom tsis yog thawj qhov hnyav. Tam sim no, GFRP tab tom tsim cov txheej txheem thov gradient nrog carbon fiber, txhawb kev txhim kho cov khoom siv aerospace mus rau qhov sib dua, lub neej ntev, thiab tus nqi qis.

Los ntawm qhov pom ntawm cov khoom siv lub cev,GFRPkuj muaj cov txiaj ntsig zoo tshaj plaws hauv kev sib dua, cov khoom thermal, kev tiv thaiv corrosion, thiab kev ua haujlwm. Hais txog kev sib dua, qhov ceev ntawm cov iav fiber ntau ntawm 1.8 ~ 2.1 g / cm3, uas tsuas yog 1/4 ntawm cov hlau thiab 2/3 ntawm cov hlau txhuas. Hauv kev sim laus kub siab, qhov kev khaws cia lub zog ntau dua 85% tom qab 1,000 teev ntawm 180 ° C. Ntxiv mus, GFRP immersed hauv 3.5% NaCl kua rau ib xyoos qhia txog kev poob zog tsawg dua 5%, thaum Q235 hlau muaj kev poob hnyav corrosion ntawm 12%. Nws cov kua qaub tsis kam yog qhov tseem ceeb, nrog rau qhov hloov pauv loj dua 0.3% thiab qhov ntim nthuav dav qis dua 0.15% tom qab 30 hnub hauv 10% HCl kua. Silane-kho GFRP cov qauv khaws cia lub zog khoov ntau dua 90% tom qab 3,000 teev.

Hauv kev xaus, vim nws qhov kev sib xyaw ua ke ntawm cov khoom, GFRP tau siv dav dav ua cov khoom siv aerospace ua tau zoo hauv kev tsim thiab tsim cov dav hlau, tuav qhov tseem ceeb tseem ceeb hauv kev lag luam aerospace niaj hnub no thiab kev txhim kho thev naus laus zis.