Cov khoom siv kub tshaj plaws nyob rau lub sijhawm no -Hlau Ua Npuas Ncauj
Hlau ua npuas ncauj muaj ib tug tej yam kev mob ntawm lub zog, ductility thiab additivity, thiab yuav siv tau raws li ib tug sib sib zog nqus structural khoom. Cov khoom siv tau ntev tau siv los ua cov khoom tseem ceeb rau aircraft clamping Cheebtsam. Hauv kev lag luam aerospace thiab cuaj luaj, cov hlau ua npuas dej yog siv los ua lub teeb yuag, cov khoom siv hluav taws xob hloov hluav taws xob. Vim tias nws tuaj yeem welded, glued los yog plated rau cov qauv, nws tuaj yeem ua rau hauv cov khoom hnyav hnyav. Xws li rau lub tis hlau plhaub ntawm lub cev txhawb nqa, lub foob pob hluav taws lub qhov ntswg ntawm lub plhaub ntawm lub cev tiv thaiv qhov kub thiab txias ntawm kev txhawb nqa lub cev (vim nws cov thermal conductivity zoo) thiab tsaws iav ntawm lub dav hlau thiab lwm yam. Hauv kev tsim kho,hlau ua npuas ncaujyog xav tau los ua lub teeb, tawv, hluav taws-resistant ntsiab, railings los yog lub cev txhawb nqa ntawm cov khoom no. Lub high-frequency, high-ceev acceleration thiab deceleration ntawm niaj hnub elevators kuj yuav tsum tau lub teeb yuag nrog ob lub zog-absorbing thiab load-bearing zog kom txo tau lub zog noj. Cylindrical shells yog dav siv nyob rau hauv engineering lug xws li lub dav hlau fuselages thiab off-shore roj platforms. Nyias-walled cylindrical shells yog yooj yim puas thaum raug loads, tab sis yog hais tias lub plhaub tau txais kev txhawb los ntawm ib tug nruam ua npuas ncauj: kauj, cov qauv muaj zog ntau dua li ib tug unreinforced center plhaub ntawm tib lub cheeb thiab loj. Copper ua npuas ncauj yog yooj yim los tsim thiab yooj yim rau deform, ua rau nws haum rau siv raws li ib tug fastener. Ua npuas ncauj hlau kuj tseem siv tau los ua kev txhawb nqakhoomrau ntau cov ntaub ntawv organic, inorganic thiab metallic. Xws li npib tsib xee ua npuas ncauj ntim nrog molten aluminium solidification ua los ntawm nickel foam reinforced aluminium alloy (NFRA) cov ntaub ntawv.
Ua npuas ncauj hlau yog qhov tsim nyog rau kev siv ntau yam ntawm cov kabmob, lub plhaub thiab cov raj ntawm lub teeb yuag j coil, ua los ntawm ntau yam khoom siv laminated. Ib qho piv txwv ntawm kev siv cov khoom ntxeem tau rau cov khoom siv yog kev tsim cov sandwich panels. Sandwich panels siv nyob rau hauv niaj hnub aircraft siv iav los yog carbon fiber composite daim tawv nqaij. Cov tawv nqaij yog sib cais los ntawm cov hlau aluminium lossis ntawv-resincov ntaub ntawv honeycomb, los yog los ntawm nruj polymer foams, nyob rau hauv thiaj li yuav muab lub sandwich vaj huam sib luag ib tug siab tshwj xeeb dabtsi yog khoov nruj thiab tshwj xeeb bending zog. Tib lub thev naus laus zis tau txuas ntxiv mus rau ntau qhov kev siv uas qhov hnyav yog qhov ntsuas qhov tseem ceeb: qhov chaw shuttles, bobsleds, kev sib tw nkoj, thiab lub tsev txav tau, thiab lwm yam.

Kev tiv thaiv cushioning kuj yog ib qho tseem ceeb ntawm kev siv cov hlau ua npuas ncauj, uas yuav tsum muaj peev xwm nqus tau lub zog thaum ua kom lub zog siab tshaj plaws ua rau cov khoom tiv thaiv hauv qab qhov txwv ntawm kev puas tsuaj. Cov ntaub ntawv ua npuas ncauj tuaj yeem ua tau zoo rau cov ntawv thov no. Los ntawm kev tswj nws cov txheeb ze ntom ntom, lub zog ntawm cov hlau ua npuas ncauj tuaj yeem hloov kho ntau yam. Tsis tas li ntawd, cov khoom siv tuaj yeem tiv taus cov kab mob loj compressive nyob rau hauv yuav luag tas li kev ntxhov siab, kom lub zog loj ntawm lub zog yog absorbed yam tsis muaj kev ntxhov siab. Hauv kev npaj cov pob txha pob txha, raws li qhov yuav tsum tau muaj ntawm qhov pore loj ntawm 150¨m ~ 250¨m thiab porosity loj, cov ntaub ntawv inorganic vim lub zog ntawm lub sijhawm no tsis tuaj yeem ua tau raws li qhov yuav tsum tau siv, thiab maj mam tsim rau hauvhlau ua npuas ncaujpob txha pob txha. Cov hlau ua npuas dej no yog tsim los ntawm cov txheej txheem xws li electroplating, thiab lawv tau raug thauj thaum lub sij hawm molding thiab lwm yam txheej txheem nrog rau hauv tib neeg lub cev. Nws yog ib qho tseem ceeb heev rau feem ntau tib neeg cov pob txha cov ntaub ntawv uas tsis muaj kev rov qab los ntawm tus kheej kom paub txog qhov loj porosity xav tau rau tib neeg cov pob txha thaum tswj cov khoom siv tshuab siab, piv txwv li, kom tau raws li qhov loj porosity xav tau rau tib neeg cov pob txha thaum tswj cov khoom siv tshuab siab.