labarai

Fiberglass Reinforced Polymer (GFRP)wani abu ne mai mahimmanci wanda aka haɗa daga gilashin gilashi a matsayin wakili mai ƙarfafawa da kuma resin polymer a matsayin matrix, ta amfani da takamaiman matakai. Babban tsarinsa ya ƙunshi filayen gilashi (kamarE-gilasi, S-gilashi, ko babban-gilashin AR-gilashi) tare da diamita na 5∼25μm da matrices thermosetting kamar epoxy resin, polyester resin, ko vinyl ester, tare da juzu'in ƙarar fiber yawanci kai 30% ~ 70% [1-3]. GFRP yana nuna kyawawan kaddarorin kamar ƙayyadaddun ƙarfi wanda ya wuce 500 MPa / (g/cm3) da ƙayyadaddun modulus wanda ya wuce 25 GPa/(g/cm3), yayin da kuma yana da halaye kamar juriya na lalata, juriya na gajiya, ƙarancin haɓakar haɓakar thermal [(7∼12) × 10-6 ° C-1], da kuma nuna gaskiya na lantarki.

A cikin filin sararin samaniya, aikace-aikacen GFRP ya fara ne a cikin 1950s kuma yanzu ya zama babban abu don rage yawan tsari da inganta ingantaccen man fetur. Ɗaukar Boeing 787 a matsayin misali, GFRP yana da kashi 15% na tsarin da ba na farko ba, wanda aka yi amfani da shi a cikin abubuwan da aka gyara kamar ginshiƙai da winglets, yana samun raguwar nauyin 20% ~ 30% idan aka kwatanta da al'ada na aluminum. Bayan da aka maye gurbin katakon bene na Airbus A320 tare da GFRP, yawan kashi ɗaya ya ragu da kashi 40%, kuma aikin sa a cikin mahalli mai ɗanɗano ya inganta sosai. A cikin sashin helikofta, bangarorin ciki na gidan Sikorsky S-92 suna amfani da tsarin sanwicin saƙar zuma na GFRP, suna samun daidaito tsakanin juriya da jinkirin harshen wuta (wanda ya dace da daidaitattun FAR 25.853). Idan aka kwatanta da Carbon Fiber Reinforced Polymer (CFRP), farashin albarkatun ƙasa na GFRP an rage shi da 50% ~ 70%, yana ba da fa'idar tattalin arziki mai mahimmanci a cikin abubuwan da ba na farko ba. A halin yanzu, GFRP yana ƙirƙirar tsarin aikace-aikacen gradient na kayan aiki tare da fiber carbon, yana haɓaka haɓaka haɓaka kayan aikin sararin samaniya zuwa nauyi, tsawon rai, da ƙarancin farashi.

Ta fuskar kaddarorin jiki,Farashin GFRPHakanan yana da fa'idodi masu ban sha'awa game da nauyi mai sauƙi, kaddarorin thermal, juriyar lalata, da aiki. Game da nauyi mai nauyi, yawancin fiber gilashin ya fito daga 1.8 ~ 2.1 g / cm3, wanda shine kawai 1/4 na karfe da 2/3 na aluminum gami. A cikin gwaje-gwajen tsufa masu zafi, ƙarfin riƙewar ƙarfin ya wuce 85% bayan sa'o'i 1,000 a 180 ° C. Bugu da ƙari kuma, GFRP da aka nutsar a cikin 3.5% NaCl bayani na shekara guda ya nuna rashin ƙarfi na ƙasa da 5%, yayin da Q235 karfe yana da asarar nauyi na 12%. Juriyar acid ɗin sa ya shahara, tare da yawan canjin taro ƙasa da 0.3% da ƙarar faɗaɗawa ƙasa da 0.15% bayan kwanaki 30 a cikin maganin 10% HCl. Samfuran GFRP da aka yi wa Silane sun kiyaye ƙimar riƙe ƙarfin lanƙwasawa sama da 90% bayan awanni 3,000.

A taƙaice, saboda haɗin kai na musamman na kaddarorin, GFRP ana amfani da shi sosai azaman babban kayan aiki mai ƙarfi a cikin ƙira da kera jiragen sama, yana riƙe da mahimmancin mahimmanci a cikin masana'antar sararin samaniya ta zamani da haɓaka fasaha.