Piv nrog cov hlau, iav fiber ntau cov ntaub ntawv sib xyaw muaj cov khoom sib zog thiab qhov ntom ntom tsawg dua li ib feem peb ntawm cov hlau.Txawm li cas los xij, hais txog lub zog, thaum qhov kev ntxhov siab nce mus txog 400MPa, cov hlau tuav yuav muaj kev ntxhov siab, thaum lub zog tensile ntawm iav fiber ntau cov ntaub ntawv tuaj yeem ncav cuag 1000-2500MPa.Piv nrog cov khoom siv hlau tsoos, iav fiber ntau cov ntaub ntawv muaj cov qauv heterogeneous thiab pom tseeb anisotropy, nrog ntau txoj haujlwm tsis ua haujlwm.Kev sim thiab kev tshawb fawb theoretical nyob rau hauv ntau hom kev thauj khoom tuaj yeem muab kev nkag siab zoo ntawm lawv cov khoom siv kho tshuab, tshwj xeeb tshaj yog thaum siv hauv thaj chaw xws li cov cuab yeej tiv thaiv hauv tebchaws thiab aerospace, uas yuav tsum muaj kev tshawb fawb tob txog lawv cov yam ntxwv thiab cov khoom siv kho tshuab kom tau raws li lawv cov kev xav tau hauv kev siv ib puag ncig.
Cov nram qab no qhia txog cov khoom siv kho tshuab thiab kev soj ntsuam kev puas tsuaj ntawm iav fiber ntau cov ntaub ntawv, muab kev taw qhia rau kev siv cov khoom siv no.
(1) Tensile zog thiab tsom xam:
Kev tshawb fawb tau pom tias cov khoom siv ntawm iav fiber reinforced epoxy resin composite cov ntaub ntawv qhia tau hais tias lub zog tensile nyob rau hauv parallel kev taw qhia ntawm cov khoom yog ntau npaum li cas nyob rau hauv txoj kab ntsug ntawm lub fiber.Yog li ntawd, hauv kev siv tswv yim, cov kev taw qhia ntawm cov iav fiber ntau yuav tsum tau ua kom zoo ib yam li qhov ua tau nrog cov kev taw qhia tensile, tag nrho siv nws cov khoom tensile zoo heev.Piv nrog cov hlau, lub zog tensile yog qhov siab dua, tab sis qhov ceev yog qis dua li cov hlau.Nws tuaj yeem pom tau tias, Cov khoom siv dav dav ntawm cov iav fiber ntau cov ntaub ntawv yog qhov siab.
Kev tshawb fawb tau pom tias nce cov iav fiber ntau ntxiv rau cov ntaub ntawv thermoplastic composite maj mam nce lub zog tensile ntawm cov khoom sib xyaw.Qhov laj thawj tseem ceeb yog vim tias cov iav fiber ntau ntxiv, cov iav fiber ntau hauv cov khoom sib xyaw yog raug rau sab nraud quab yuam.Nyob rau tib lub sijhawm, vim qhov nce ntawm cov iav fiber ntau, cov resin matrix ntawm cov iav fibers ua thinner, uas yog qhov tsim nyog rau kev tsim kho ntawm iav fiber reinforced thav ntawv.Yog li ntawd, qhov nce hauv cov ntsiab lus iav fiber ntau ua rau muaj kev ntxhov siab ntau dua los ntawm cov resin mus rau iav fiber ntau hauv cov khoom sib xyaw hauv qab cov khoom siv sab nraud, txhim kho lawv cov khoom tensile.
Kev tshawb fawb ntawm tensile kev ntsuam xyuas ntawm iav fiber ntau unsaturated polyester composite cov ntaub ntawv tau pom tias hom tsis ua hauj lwm ntawm iav fiber reinforced composite cov ntaub ntawv yog ua ke tsis ua hauj lwm ntawm fibers thiab resin matrix los ntawm scanning electron microscopy ntawm tensile seem.Cov pob txha tawg qhia tau hais tias ntau tus iav fiber ntau tau rub tawm ntawm cov khoom siv hluav taws xob ntawm cov khoom siv tensile, thiab cov iav fibers rub tawm los ntawm cov iav fiber ntau yog du thiab huv si, nrog rau cov khoom siv tsawg heev ntawm cov khoom siv rau saum npoo. ntawm cov iav fibers, Qhov kev ua tau zoo yog brittle puas.Los ntawm kev txhim kho qhov kev sib txuas ntawm cov iav fibers thiab cov resin, lub peev xwm embedding ntawm ob yog txhim kho.Ntawm qhov tensile seem, feem ntau ntawm cov matrix resin fragments nrog kev sib txuas ntawm cov iav fiber ntau tuaj yeem pom.Kev soj ntsuam ntxiv nthuav dav qhia tau hais tias ntau tus matrix resin bonds ntawm qhov chaw ntawm cov iav fibers muab rho tawm thiab nthuav tawm cov zuag zoo li kev npaj.Cov pob txha tawg qhia pom cov pob txha tawg, uas tuaj yeem ua tiav cov khoom siv kho tshuab zoo dua.
(2) Khoov kev ua tau zoo thiab kev tsom xam:
Peb lub ntsiab lus khoov kev qaug zog tau ua rau ntawm daim phiaj unidirectional thiab resin casting lub cev ntawm iav fiber reinforced epoxy resin cov ntaub ntawv.Cov txiaj ntsig tau pom tias qhov khoov nruj ntawm ob txuas ntxiv txo qis nrog qhov nce ntawm lub sijhawm qaug zog.Txawm li cas los xij, qhov bending txhav ntawm iav fiber reinforced unidirectional daim hlau yog ntau dua li ntawm cov casting lub cev, thiab qhov txo qis ntawm bending txhav yog qeeb dua.Muaj ntau lub sij hawm qaug zog ntawm cov kab nrib pleb tshwm sim nyob rau lub sij hawm, qhia tias iav fiber ntau muaj kev cuam tshuam rau kev khoov ntawm cov matrix.
Nrog rau kev qhia ntawm cov iav fibers thiab maj mam nce hauv ntim feem, qhov khoov lub zog ntawm cov ntaub ntawv sib xyaw kuj nce raws li.Thaum cov fiber ntau feem yog 50%, nws lub zog khoov yog qhov siab tshaj plaws, uas yog 21.3% siab dua qhov qub zog.Txawm li cas los xij, thaum cov khoom siv fiber ntau yog 80%, qhov khoov lub zog ntawm cov ntaub ntawv sib xyaw pom tau tias qhov txo qis, uas yog qis dua lub zog ntawm cov qauv uas tsis muaj fiber ntau.Nws yog feem ntau ntseeg tias, Lub zog qis ntawm cov khoom yuav yog vim microcracks sab hauv thiab cov voids thaiv qhov kev hloov pauv ntawm kev thauj khoom los ntawm matrix mus rau fibers, thiab nyob rau hauv cov quab yuam sab nraud, microcracks nthuav dav mus rau qhov ua txhaum, thaum kawg ua rau kev puas tsuaj. interface kev sib txuas ntawm cov iav fiber ntau cov khoom siv feem ntau yog nyob ntawm qhov dej khov ntawm cov iav fiber ntau ntawm qhov kub siab los qhwv cov fibers, thiab cov iav fiber ntau dhau heev cuam tshuam cov viscous ntws ntawm matrix, ua rau qee qhov kev puas tsuaj rau qhov txuas ntxiv ntawm. cov interfaces.
(3) Kev ua tau zoo ntawm kev nkag mus:
Kev siv lub zog muaj zog iav fiber ntau ntxiv cov ntaub ntawv sib xyaw rau lub ntsej muag thiab sab nraub qaum ntawm cov tshuaj tiv thaiv armor muaj kev nkag mus tau zoo dua piv rau cov tsoos alloy steel.Piv nrog cov hlau alloy, iav fiber ntau cov ntaub ntawv rau lub ntsej muag thiab sab nraub qaum ntawm cov tshuaj tiv thaiv phom sij muaj cov seem me me tom qab detonation, tsis muaj peev xwm tua tau, thiab tuaj yeem tshem tawm ib nrab ntawm kev tua cov phom sij ntawm cov khoom tawg.
Post lub sij hawm: Nov-07-2023
