1 daim ntawv thov lub ntsiab
Lub untwisted roving uas tib neeg nkag rau hauv kev sib cuag hauv lub neej muaj cov qauv yooj yim thiab yog ua los ntawm parallel monofilaments sib sau ua ke rau hauv bundles. Tsis suav nrog rov qab tuaj yeem faib ua ob hom: alkali-dawb thiab nruab nrab-alkali, uas yog feem ntau muaj kev sib txawv raws li qhov sib txawv ntawm cov iav muaj pes tsawg leeg. Txhawm rau tsim cov iav ua haujlwm zoo, txoj kab uas hla ntawm cov iav cov khoom siv yuav tsum siv nyob nruab nrab ntawm 12 thiab 23 μd. Vim nws cov yam ntxwv, nws tuaj yeem siv ncaj qha rau hauv cov ntaub ntawv sib xyaw ntawm qee cov ntaub ntawv sib xyaw, xws li cov txheej txheem winding thiab pultrusion. Thiab nws kuj tseem tuaj yeem siv Woven rau hauv rov qab cov ntaub, feem ntau yog vim nws cov khoom siv tsis sib haum loj heev. Ib qho ntxiv, daim teb ntawm daim ntawv thov ntawm tws roving kuj dav heev.
1.1.1Ntsws Roving rau Jetting
Hauv FRP txhaj tshuaj molding cov txheej txheem, lub ntswj roving yuav tsum muaj cov hauv qab no:
(1) Txij li txij li kev txiav tas li yog xav tau nyob rau hauv ntau lawm, nws yog ib qho tsim nyog los xyuas kom meej tias tsis muaj hluav taws xob tsawg yog tsim tawm thaum lub sijhawm txiav, uas yuav tsum txiav kev ua tau zoo.
(2) Tom qab txiav, kom ntau li ntau tau ua tau yog lav tau tias yog tsim tawm, yog li kev ua haujlwm ntawm cov kab lo lo lus yog lav tau siab. Kev ua tau zoo ntawm dispersing lub roving rau hauv cov strands tom qab txiav yog siab dua.
(3) Tom qab tws, kom ntseeg tau tias cov xov paj nyoos tuaj yeem them tag nrho ntawm cov pwm, cov xov paj nyoos yuav tsum muaj cov khoom ua si zoo.
(4) Vim tias nws yuav tsum tau yooj yim rau yob tiaj tus kom yob tawm huab cua npuas, nws yuav tsum muaj infiltrate lub resin sai sai.
(5) Vim yog cov qauv sib txawv ntawm ntau cov kab tsuag sib txawv, txhawm rau haum rau cov phom tsuag sib txawv, ua kom cov tuab tuab ntawm cov xaim nyoos yog ib nrab.
1.1.2Ntsws Roving rau SMC
SMC, tseem hu ua cov ntawv moulding compound, tuaj yeem pom txhua qhov chaw hauv lub neej, xws li cov chaw da dej zoo, muaj ntau yam rooj thiab ntau yam rooj smc roving. Hauv kev tsim khoom, muaj ntau yam yuav tsum tau ua rau rov qab rau SMC. Nws yog ib qho tsim nyog yuav tsum kom ntseeg tau zoo wrowiness, cov tshuaj tuas zoo, thiab tsis muaj ntaub plaub kom ntseeg tau tias SMC daim ntawv tsim tawm. Rau cov xim SMC, cov tseev kom rov qab sib txawv, thiab nws yuav tsum yooj yim nkag mus rau hauv lub resin nrog cov ntsiab lus xim. Feem ntau, cov fiberglass smc roving yog 2400Tex, thiab tseem muaj ob kis qhov twg nws yog 4800Tex.
1.1.3Untwisted roving rau winding
Txhawm rau ua kom frp kav dej nrog cov tuab tuab, lub tank lub tank winding txoj kev tau los ua. Rau kev rov qab winding, nws yuav tsum muaj cov yam ntxwv hauv qab no.
(1) Nws yuav tsum yooj yim rau kab xev, feem ntau yog nyob rau hauv cov duab ntawm daim kab xev tiaj.
(2) Vim tias qhov dav dav tsis tau roving yog nquag poob tawm ntawm lub voj thaum nws tawm ntawm nws qhov tsis zoo, thiab lub txiaj ntsig zoo li tsis yog tus noog lub zes.
(3) Cov kev ntxhov siab tsis tuaj yeem tsis dheev lossis me me, thiab qhov tshwm sim ntawm overhang tsis tuaj yeem tshwm sim.
(4) Kev ua haujlwm ntom ntom rau kab kev uas yuav tsum tau ua kom rov qab rov qab yog yuav tsum tsis zoo thiab tsawg dua tus nqi teev tseg.
(5) Txhawm rau kom ntseeg tau tias nws yooj yim yuav tsum tau wetted thaum dhau los ntawm lub tais tais tais, lub permeability ntawm kev rov qab yuav tsum tau ua tau zoo.
1.1.4Roving Rau Pulfusion
Cov txheej txheem pultrusion tau siv dav hauv kev tsim cov khoom siv ntau yam nrog cov kab ke tsis xwm yeem. Lub rov qab rau pultrusion yuav tsum xyuas kom meej tias nws cov iav fiber ntau cov ntsiab lus thiab lub zog tsis haum yog nyob rau theem siab. Qhov rov qab rau pultrusion siv nyob rau hauv kev tsim khoom yog kev sib xyaw ntawm ntau cov strands ntawm raw kev nyoos, thiab qee tus kuj yog cov ua tau. Nws lwm cov kev xav tau zoo ib yam li cov windings windings.
1.1.5 Sib Ntsuag Rov Los Rau Weaving
Hauv lub neej txhua hnub, peb pom cov ntaub tuab siras nrog cov tuab tuab lossis rov qab siv cov khoom tseem ceeb Lub rov qab siv kuj tseem hu ua roving rau weaving. Feem ntau ntawm cov ntaub no yog cov ntsiab lus hauv tes nteg fp molding. Txog rau hnub soaving rovings, cov cai hauv qab no yuav tsum tau ua kom tiav:
(1) Nws yog cov coj-resistant.
(2) yooj yim rau kab xev.
(3) Vim tias nws yog tsuas yog siv rau kev tab tom, yuav tsum muaj ib kauj ruam ziab ua ntej tab tom hlab.
(4) Hais txog nro, nws yog feem ntau yog kom ntseeg tias nws tsis tuaj yeem sai lossis me me, thiab nws yuav tsum tau ceev cia kom zoo li qub. Thiab ntsib qee yam kev mob ntawm Overhang.
(5) Tsis pom zoo yog qhov zoo dua.
(6) Nws yooj yim yuav tsum tau infiltrated los ntawm resin thaum dhau los ntawm lub chaw so hluav taws xob, yog li cov permeability yuav tsum yog qhov zoo.
1.1.6 Ntswj tsis sib haum xeeb rau preform
Qhov ua ntej hu ua precorm cov txheej txheem, feem ntau hais lus, yog ua ntej tsim, thiab cov khoom tau tau txais cov kauj ruam tsim nyog. Hauv kev tsim khoom, peb thawj zaug chop qhov rov qab, thiab tshuaj tsuag cov tws roving ntawm lub vas, qhov chaw twg yuav tsum yog ib qho net nrog cov duab uas tau txiav txim siab. Tom qab ntawd tsuag rapin rau cov duab. Thaum kawg, cov khoom puab tau muab tso rau hauv cov pwm, thiab cov cob yog txhaj thiab tom qab ntawd kub-nias kom tau txais cov khoom. Cov kev xav tau kev ua tau zoo tshaj plaws rau cov khoom lag luam zoo ib yam li cov khoom siv dav hlau rovings.
1.2 Iav Fiber Reoving Npuag
Muaj ntau ntau cov roving npuag, thiab gingham yog ib qho ntawm lawv. Hauv kev nteg tes nteg-up frp txheej txheem, gingham tau siv dav siv raws li qhov tseem ceeb tshaj plaws substrate. Yog tias koj xav ua kom lub zog ntawm lub gingham, tom qab ntawd koj yuav tsum tau hloov chaw ua suab nkauj thiab warft ntawm cov ntaub, uas tuaj yeem hloov mus rau hauv kev tsis sib haum gingham. Txhawm rau kom muaj qhov zoo ntawm daim ntaub kuaj xyuas, cov yam ntxwv hauv qab no yuav tsum tau lees tias.
(1) Rau cov ntaub, nws yuav tsum muaj tiaj tus, tsis muaj kev thab plaub, cov npoo thiab cov ceg yuav tsum ncaj, thiab yuav tsum tsis muaj ib qho cim qias neeg.
(2) Qhov ntev, qhov tsis zoo, qhov hnyav, qhov hnyav thiab ntom ntawm cov ntaub yuav tsum tau raws cov qauv.
(3) Cov iav fiber ntau filaments yuav tsum tau muab pov tseg.
(4) Yuav kom muaj peev xwm sai sai infiltrated los ntawm resin.
(5) Lub dryness thiab vaum ntawm cov ntaub ntawv woven rau ntau cov khoom yuav tsum ua raws li qee qhov kev cai.
1.3 iav fiber ntau lev
1.3.1Tws mat
Ua ntej chop cov iav strands thiab nphoo lawv ntawm npaj mesh siv. Tom qab ntawd sprinkle lub binder rau nws, ua kom sov nws kom yaj, thiab tom qab ntawd txias nws kom ua tiav, thiab cov tws strand lev yog tsim. Hlob strand fat fiber mats yog siv rau hauv cov txheej txheem ua kab thiab tom qab ntawm SMC WhabBranes. Txhawm rau kom ua tiav cov nyhuv zoo tshaj plaws ntawm cov tws strand lev, hauv kev tsim khoom, qhov yuav tsum tau ua rau lub zog strand lev yog raws li hauv qab no.
(1) tag nrho cov tws strand lev yog tiaj thiab txawm tias.
(2) lub qhov ntawm tws strand lev yog me me thiab hnav khaub ncaws loj
(4) raws li qee yam.
(5) Nws tuaj yeem yog cov khoom siv sai.
1.3.2 Nruam Strand Mat
Cov iav strands tau pw ua ke ntawm txoj siv Mesh raws li qee yam. Feem ntau, cov neeg coj mus uas lawv yuav tsum tau nteg nyob rau hauv ib daim duab ntawm 8. Tom qab ntawd txau hmoov nplaum rau saum thiab cua sov kom kho tau. Nruam cov mats yog farior zoo tshaj rau tws strand strand strand cov ntaub ntawv, feem ntau yog vim tias cov iav fibers nyob rau hauv kev txuas ntxiv strand mats yog txuas ntxiv. Vim tias nws cov nyhuv zoo dua, nws tau siv hauv ntau cov txheej txheem.
1.3.3Nplaim Mat
Daim ntawv thov ntawm nto mat kuj tseem muaj nyob rau hauv lub neej txhua hnub, xws li txheej cob cov khoom frp, uas yog nruab nrab alkali iav iav deg. Noj frp ua ib qho piv txwv, vim hais tias nws cov npoo av yog ua los ntawm cov iav alkali, nws ua rau FP Chemical tsis ruaj khov. Nyob rau tib lub sijhawm, vim hais tias sab npoo lev yog lub teeb heev thiab yuag, nws tuaj yeem nqus tau ntau dua cov resin, uas tsis tuaj yeem ua lub luag haujlwm tiv thaiv tab sis tseem ua lub luag haujlwm zoo nkauj.
1.3.4Koob
Koob mat feem ntau muab faib ua ob pawg, thawj qeb yog txig fiber ntau koob xuas nrig ntaus punching. Cov txheej txheem ntau lawm yog yooj yim, ua ntej tsuav, qhov loj yog li 5 cm, tom qab ntawd thoftle nws ntawm cov khoom siv ua ntej nrog lub crochet rab koob, vim yog tus Cov nyhuv ntawm cov crochet rab koob, cov fibers tau nkaug mus rau hauv substrate thiab tom qab ntawd provoked los ua ib qho qauv peb-seem. Xaiv cov substrate kuj tseem muaj qee yam yuav tsum tau thiab yuav tsum muaj cov muag muag muag muag. Koob qauv mat cov khoom siv tau dav siv nyob rau hauv lub suab rwb thaiv tsev thiab thermal rwb thaiv tsev cov ntaub ntawv raws li lawv cov khoom. Ntawm chav kawm, nws kuj tseem tuaj yeem siv rau hauv FRP, tab sis nws tsis tau nrov vim tias cov khoom tau muaj zog tsawg thiab muaj ntau yam tawg. Lwm hom yog hu ua cov ntaub ntawv txuas txuas ntxiv rab koob-punched lev, thiab cov txheej txheem ntau lawm kuj yooj yim heev. Ua ntej, cov ntsiab lus tau muab pov rau ntawm Mesh Siv tau npaj ua ntej nrog cov xaim hluav taws xob ntaus ntawv. Ib yam li ntawd, lub crochet rab koob yog noj rau acupuncture los ua tus qauv peb-seem. Hauv cov iav fiber cuam tshuam txhawb thermoplastics, txuas ntxiv Strand lub koob mats zoo siv.
Lub tws iav cov fibers tuaj yeem hloov mus rau ob qho sib txawv ntawm qhov ntev ntev los ntawm kev ua stitching ntawm lub tshuab stitchacking. Qhov thib ib yog los ua ib tug tws strand lev, uas hloov pauv ib binder-sib khi tws strand lev. Qhov thib ob yog lub long-fiber ntau, uas hloov pauv cov qauv txuas ntxiv ua tiav. Cov ob hom sib txawv no muaj qhov ua tau zoo. Lawv tsis siv cov nplaum hauv cov txheej txheem ntau lawm, tsis txhob muaj kuab paug thiab pov tseg, thiab txaus siab rau cov neeg ua kom txuag tau cov peev txheej thiab tiv thaiv ib puag ncig.
1.4 milled fibers
Cov txheej txheem ntau lawm ntawm hauv av fiber yog yooj yim heev. Siv rab rauj zeb lossis pob zeb zeb thiab muab tso rau hauv nws. Sib tsoo thiab sib tsoo cov hmoov av kuj muaj ntau cov ntawv thov hauv kev tsim khoom. Nyob rau hauv cov txheej txheem txhaj tshuaj tiv thaiv, cov as fiber ntau ua raws li cov khoom siv ntxiv, thiab nws cov kev ua tau zoo dua li ntawm lwm cov fibers. Txhawm rau kom tsis txhob tawg thiab txhim kho cov chaw tawg hauv kev tsim cov khoom lag luam pov thiab cov khoom siv pwm, cov hmoov av tuaj yeem siv tau ua cov fillers.
1.5 fiberglass npuag
1.5.1Daim mog iav
Nws belongs rau ib hom ntawm iav fiber ntau ntaub. Daim ntaub qhwv iav tsim hauv cov chaw sib txawv muaj cov qauv sib txawv. Nyob rau hauv daim ntawv ntawm iav daim ntaub hauv kuv lub tebchaws, nws feem ntau muab faib ua ob hom: alkali-dawb iav daim ntaub thiab daim ntaub nruab nrab alkali. Daim ntawv thov ntawm iav daim ntaub yuav tau hais tias yuav muaj ntau yam, thiab lub tsheb hauv lub tsheb, thiab lwm yam. Rau nruab nrab alkali iav iav daim ntaub, nws corrosion tsis zoo, yog li nws tau siv dav hauv kev tsim cov ntim thiab corrosion-resistant khoom. Txhawm rau txiav txim cov yam ntxwv ntawm cov iav fiber ntau, nws yog feem ntau yuav pib ntawm cov xovtas, cov qauv ntawm cov xovtas yog cov xov, lub warp thiab warp thiab weft cov qauv thiab cov qauv ntaub. Nyob rau hauv lub warp thiab weft kev taw qhia, qhov ntom yog nyob ntawm cov qauv sib txawv ntawm cov paj thiab cov qauv ntaub. Lub cev ntawm lub cev yog nyob ntawm lub warp thiab weft density thiab tus qauv ntawm cov xov paj fiber ntau.
1.5.2 iav Ribbon
Iav Ribbon feem ntau muab faib ua ob pawg, thawj yog selvaceories, tus hom thib ob tsis yog woven raws li tus qauv ntawm weave ntawm weave ntawm dawb weave. Iav Ribbons tuaj yeem siv rau cov khoom hluav taws xob uas xav tau cov khoom muaj dielecy siab. Lub Zog Muaj Zog Khoom Siv Hluav Taws Xob.
1.5.3 unidirectional npuag
Unidirectional ntaub hauv txhua hnub lub neej yog woven los ntawm ob yarns ntawm cov tuab tuab, thiab cov ntaub muaj zog muaj lub zog loj.
1.5.4 Peb-seem npuag
Peb-seem ntaub yog txawv ntawm cov qauv ntawm lub dav hlau npuag, nws yog peb-seem, yog li nws cov nyhuv yog qhov zoo dua li cov dav hlau feem ntau. Peb-seem fiber ntau cov khoom siv muaj txiaj ntsig muaj qhov zoo uas lwm cov khoom siv fiber ntau ntxiv uas tsis muaj. Vim tias cov fiber ntau yog peb-seem, cov nyhuv tag nrho yog qhov zoo dua, thiab kev puas tsuaj tawm tsam ua kom muaj zog dua. Nrog rau kev txhim kho kev tshawb fawb thiab thev naus laus zis, cov tsheb thiab tam sim no, thiab tam sim no nws txawm tias muaj khoom siv ua si hauv tshav pob thiab khoom siv kho mob. Cov ntaub qhwv peb-seem yog tsuas muab faib ua tsib pawg, thiab muaj ntau cov duab. Nws tuaj yeem pom tias qhov chaw loj hlob ntawm cov hlau uas muaj peb-seem yog loj heev.
1.5.5 daim ntaub
Cov ntaub zoo li cov ntaub yog siv los txhawb cov ntaub ntawv, thiab lawv cov duab yog nyob ntawm cov khoom ntawm cov khoom uas yuav tsum tau txhawb, yuav tsum tau woven rau lub tshuab nplua. Hauv kev tsim khoom, peb tuaj yeem ua cov duab sib thooj lossis cov duab asymmetrical nrog cov kev txwv tsis muaj thiab cov kev cia siab
1.5.6 grooved tseem ceeb npuag
Lub fabrication ntawm cov zawj uas cov ntaub tseem ceeb kuj tseem yooj yim. Ob txheej ntawm cov ntaub tau muab tso rau hauv parallel, thiab tom qab ntawd lawv txuas los ntawm cov chaw ntsug yog lav tau kom muaj voos xwm txheej lossis duab plaub.
1.5.7 fiberglass stitched npuag
Nws yog cov ntaub tshwj xeeb heev, tib neeg kuj hu nws knitted mat, tab sis nws tsis yog cov ntaub thiab lev li peb paub nws nyob rau hauv qhov ib txwm muaj. Nws yog tsim nyog teev uas muaj cov ntaub ua ke, uas tsis yog woven ua ke los ntawm Warp thiab Weft, tab sis yog hloov sib tshooj los ntawm Warp thiab Weft. :
1.5.8 fiberglass insulating lub tes tsho
Cov txheej txheem ntau lawm yog qhov yooj yim. Ua ntej, qee cov xov tooj iav fiber yog xaiv, thiab tom qab ntawd lawv tau woven rau hauv lub tubular puab. Tom qab ntawd, raws li cov kev ua rwb thaiv tsev sib txawv, cov khoom xav tau yog tsim los ntawm txheej lawv nrog resin.
1.6 Cov iav fiber ntau ua ke
Nrog rau kev txhim kho sai sai ntawm kev tshawb fawb thiab thev naus laus zis siv, cov khoom lag luam fiber ntau, thiab ntau yam iav fiber ntau tau tshwm sim los ntawm 1970 mus rau tam sim no. Feem ntau muaj cov hauv qab no:
(1) tws strand lev + untwisted roving + tws strand lev
(2) untwisted roving npuag + tws strand lev
(3) txhoov strand lev + Nruam Strand Mat + Qws Strand Mat
(4) Random Rov qab + Nqaum Prefaib Mat
(5) Unidirectional carbon fiber tev + tws strand lev lossis ntaub
(6) nplaim deg + tws strands
(7) Cov Khaub Ncaws Iav + iav nyias nyias nyias los yog Unidirectional Roving + Daim Ntaub Iav
1.7 Cov ntaub npuag fiber ntau tsis-woven
Cov thev naus laus zis no tsis yog thawj zaug hauv kuv lub tebchaws. Cov cuab yeej ua haujlwm ntxov tshaj plaws tau tsim tawm hauv Tebchaws Europe. Tom qab ntawd, vim yog neeg tsiv teb tsaws chaw, cov cuab tam no tau coj mus rau Tebchaws Asmeskas, Kaus Lim Qab Teb thiab lwm lub tebchaws. Txhawm rau txhawb txoj kev loj hlob ntawm cov iav fiber ntau, kuv lub teb chaws tau tsim muaj ntau cov chaw tsim khoom thiab nqis peev ntau ntawm cov kab ntau ntau. Cov. Hauv kuv lub tebchaws, iav fiber ntau ntub-nteg mats yog feem ntau muab faib ua cov hauv qab no:
(1) Vuas Vuag lev ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ntawm Asphalt Mem thiab cov xim asphalt shingles, ua rau lawv zoo dua.
(2) Yeeb lwg Mat: zoo ib yam li lub npe, cov khoom no feem ntau yog siv hauv cov raj. Vim tias cov iav fiber yog corrosion-resistant, nws tuaj yeem tiv thaiv cov raj xa hluav taws los ntawm kev xeb.
(3) Lub saum npoo hlau feem ntau yog siv rau ntawm Frp cov khoom los tiv thaiv nws.
(4) Veneer mat feem ntau yog siv rau phab ntsa thiab qab vim tias nws tuaj yeem tiv thaiv cov xim los ntawm kev tawg. Nws tuaj yeem ua kom cov phab ntsa ntxiv tiaj tus thiab tsis tas yuav txiav tau ntau xyoo.
(5) pem teb hauv pem teb ib txwm siv los ua cov khoom siv hauv tsev hauv cov plag tsev
(6) ntaub pua plag lev; raws li cov khoom hauv paus hauv cov ntaub pua plag.
(7) lub tooj liab clad laminate lev txuas nrog tus tooj liab clad laminate tuaj yeem txhim kho nws txoj kev xuas nrig ntaus nrig.
2 cov ntawv thov tshwj xeeb ntawm cov iav fiber ntau
2.1 txhawb txoj cai ntawm cov iav fiber ntau txhawb cov pob zeb
Lub hauv paus ntsiab lus ntawm cov iav fiber ntau txhawb cov qhob yog qhov zoo li ntawd ntawm cov iav fiber ntau ntxiv txhawb cov khoom siv. Ua ntej tshaj plaws, ntxiv cov iav fiber ntau rau cov pob zeb ua, cov iav fiber yuav dais txoj kev ntxhov siab sab hauv ntawm cov khoom, yog li tiv thaiv kev nthuav dav ntawm cov micro-kab nrib pleb. Thaum lub sij hawm tsim ntawm qhob nrib pleb, cov khoom ua yeeb yam raws li kev sib sau yuav tiv thaiv qhov tshwm sim ntawm cov kab nrib pleb. Yog tias cov nyhuv sib xyaw ua tau zoo txaus, cov kab nrib pleb yuav tsis muaj peev xwm nthuav thiab nkag mus. Lub luag hauj lwm ntawm cov fiber ntau hauv pob zeb ua yog kev sib sau ua ke, uas tuaj yeem tiv thaiv ntau tiam thiab nthuav tawm ntawm cov kab nrib pleb. Thaum cov kab nrib pleb kis mus rau ib puag ncig ntawm cov iav fiber ntau, cov iav fiber yuav thaiv cov nrib pleb, thiab ua kom muaj kev sib raug zoo, yog li ua rau muaj kev nthuav dav ntawm cov kab tawg, yog li lub zog tsim nyog Kev puas tsuaj yuav tau nce.
2.2 Kev Puas Tsuaj Kev Puas Tsuaj Ntawm Cov Iav Fiber Comse
Ua ntej cov iav fiber prole prolected pob zeb tawg, lub tensile nws bears yog feem ntau yog sib qhia thiab cov iav fiber. Thaum lub sij hawm cov txheej txheem tawg, kev ntxhov siab yuav kis tau los ntawm cov pob zeb ua rau cov iav uas nyob ib sab tas los. Yog hais tias lub tensile yuam txuas ntxiv ntxiv, lub fiber ntau yuav puas, thiab kev puas tsuaj yog ntau hom kev puas tsuaj, thiab rub tawm kev puas tsuaj.
2.2.1 shear tsis ua hauj lwm
Lub rear kev nyuaj siab tau los ntawm cov fiber ntau txhawb kev ua ke los ntawm cov iav fiber ntau, thiab cov iav fiber ntau yuav raug puas ntsoog. Txawm li cas los xij, iav fiber muaj nws tus kheej zoo. Nws muaj ntev ntev thiab ib thaj chaw me me, yog li kev txhim kho ntawm cov shear tiv thaiv ntawm cov iav fiber yog tsis muaj zog.
2.2.2 Tension Ua tsis tiav
Thaum lub zog tensile ntawm cov iav fiber ntau dua li cov qib, cov iav fiber yuav tawg. Yog tias cov pob zeb ua kom tawg, cov iav fiber yuav dhau mus rau tensile deformation, nws lub ntim tom qab yuav ua kom tawg, thiab lub zog tensile yuav tawg sai sai.
2.2.3 rub-tawm kev puas tsuaj
Thaum cov pob zeb ua tawg, lub tensile quab yuam ntawm cov iav fiber yuav tau ua kom zoo dua, thiab cov pob zeb rau cov iav fiber ntau, kom cov iav fiber yuav raug puas thiab tom qab ntawd rub tawm.
2.3 FLEXURAL PARTENTS ntawm cov iav Fiber Comleinced
Thaum cov khoom siv txhawb nqa lub nra, nws txoj kev sib tw ntxhov siab-sib cais yuav muab faib ua peb yam sib txawv ntawm cov tshuab tsom xam, raws li pom hauv daim duab. Thawj theem: Elastic deformation tshwm sim ua ntej kom txog thaum pib tawg. Lub ntsiab tseem ceeb ntawm theem no yog tias qhov deformation nce linearly kom txog thaum taw tes rau ntawm lub iav fiber prolectived qhob. Qhov thib ob theem: ib zaug pob zeb ua pob zeb ua ke, cov khoom siv nws yuav pauv mus rau cov fiber ntau nws tus kheej thiab kev sib raug zoo nrog cov pob zeb. Point B yog lub qhov kawg ntawm qhov kawg ntawm cov iav fiber prolectived qhob. Qhov thib peb theem: ncav cuag lub zog kawg, lub khob fiber ntau los yog muab cov nyiaj seem, thiab cov nyiaj seem tseem tuaj yeem ua rau muaj kev cuam tshuam kom ntseeg tau tias yuav tsis loj.
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Lub Sijhawm Post: Jul-06-2022
