Txhua pawg

Koj tseem nyob ntawm no: Tsev>Xov Xwm

Media

Taw qhia rau cov ntsiab lus ntawm isotropy, quasi-isotropy thiab anisotropy ntawm carbon fiber los xij

Views:1025 Author: Linda Tshaj Tawm Sijhawm: 2022-08-12 keeb kwm:

        Thaum ua haujlwm nrog cov roj carbon fibers, paub txog lawv lub zog zoo thiab qhov hnyav-rau-qhov hnyav, nws yog ib qho tseem ceeb kom nkag siab tias fiber ntau orientation cuam tshuam rau lub zog thiab nruj ntawm carbon fiber composite (CFRP) laminates. Muaj ntau txoj hauv kev rau laminate tsim ntawm cov vaj huam sib luag sib xyaw, qhov twg cov laminates tau taw qhia ntawm lub kaum sab xis los tsim cov khoom sib txawv. Cov khoom no yog: isotropic, quasi-isotropic thiab anisotropic.

       Isotropic yog hais txog cov khoom uas nws lub zog thiab qhov tawv nqaij yog tib yam thaum ntsuas nyob rau hauv ib qho kev taw qhia los ntawm cov khoom. Piv txwv ntawm cov tshuaj isotropic yog iav thiab hlau.

       Quasi-isotropic yog hais txog cov khoom uas yog isotropic tab sis tsuas yog nyob rau hauv lub dav hlau. Hauv lwm lo lus, lub zog thiab nruj yog sib npaug ntawm txhua qhov kev qhia hauv lub dav hlau ntawm ib feem. Ntau CFRP laminates poob rau hauv pawg no.

         Anisotropy yog hais txog cov ntaub ntawv uas muaj qhov sib txawv ntawm qhov muaj zog thiab qhov tawv nqaij sib txawv ntawm cov khoom siv. Piv txwv li, ntoo nyuaj dua li cov nplej ntau dua li hla nws. Carbon fiber laminates ua nrog fibers uas yog tag nrho cov taw qhia nyob rau hauv ib qho kev taw qhia yog tsis tshua muaj anisotropic.


各向同性、各向异性1

Kev npaj ntawm quasi-isotropic carbon fiber laminates

          Thaum cov kev taw qhia ntawm cov fibers nyob rau hauv lub layup yog sib npaug, CFRP laminates muaj quasi-isotropic zog xws li hais tias lawv lub zog thiab khov kho nyob twj ywm tsis hais txog ntawm cov kev taw qhia nyob rau hauv uas cov khoom yog loaded. Txawm hais tias ib tus neeg cov pa roj carbon fiber ntau plies los yog plies yog tsim los ntawm cov ntaub woven los yog unidirectional carbon fibers, lawv tuaj yeem sib sau ua ke rau hauv cov ntaub ntawv isotropic thaum ua ke rau hauv cov laminates zoo.

          Thaum cov kev taw qhia ntawm cov plies yog sib npaug, ib qho quasi-isotropic laminate yog ua xws li qhov tensile txhav ntawm lub laminate yog tib yam nyob rau hauv txhua qhov kev taw qhia hauv dav hlau. Feem ntau, cov nplooj ntawv quasi-isotropic yog tsim los siv cov pa roj carbon fiber ntau nrog plies taw qhia ntawm 0º, 90º, +45º thiab -45º nrog qhov tsawg kawg nkaus ntawm 12.5% ​​hauv txhua ntawm plaub cov lus qhia. Unidirectional txheej nrog kev taw qhia ntawm 0º, 60º thiab 120º tuaj yeem ua tiav quasi-isotropic zog.

          Laminates tuaj yeem yog quasi-isotropic thiab tsis zoo li ua si los ntawm txoj cai. Piv txwv li, raws li tau hais los saum no, 0º / -45º / +45º / 90º laminates yog quasi-isotropic. Txawm li cas los xij, yog tias txhua txheej yog taw qhia ntawm tib lub kaum sab xis rau nws qhov kev taw qhia thawj (xws li +60º), laminate yuav nyob twj ywm isotropic. +60º reorientation ntawm laminate rau daim ntawv 60º / 15º / -75º / -30º laminate. Ntxiv rau lub kaum sab xis, cov pa roj carbon fiber ntau zoo muaj lwm cov qauv tsim: cov pawg yuav tsum sib luag. Tsis tas li ntawd, txhua daim ntawv yuav feem ntau muaj tib lub fiber-rau-resin piv; muaj tib txheej thickness; tib hom fiber ntau thiab geometry

Quasi-isotropic carbon fiber board tsim

          Nyob rau hauv ib tug raug quasi-isotropic carbon fiber daim ntawv, daim ntawv yuav tsum muaj tsawg kawg yog 4 txheej, thiab txhua txheej yuav tsum muaj tib yam nruj thiab tuab. Tsis tas li ntawd, fiber ntau orientation yuav tsum sib npaug thiab symmetrical. Ntxiv rau kev sib sau ua ke muab quasi-isotropic zog, fibers nyob rau hauv sib txawv orientations muaj ib tug tshwj xeeb lub zog.

         0º Txheej: Muab axial lub zog thiab nruj, zoo tagnrho rau kab teeb thiab kab uas yuav tsum tau tiv thaiv axial loads.

        +/-45º ply: Muab shear thiab torsional zog thiab nruj, zoo tagnrho rau torsion shafts thiab shear webs xws li I-beams.

         90º Txheej: Muab lub zog rau sab nraud thiab nruj, zoo tagnrho rau kev tsim cov khaubncaws sab nraud povtseg uas tuav txhua yam ua ke thiab muab lub zog ntawm lub nkoj siab.

Quasi-isotropic kom zoo dua

          Cov nplooj ntawv carbon fiber tuaj yeem tsim tau pheej yig los ntawm tsis siv quasi-isotropic laminations. Piv txwv li, yog tias lub laminate yog tsim los siv tsuas yog 0 thiab 90 degree carbon fiber txheej, lub laminate yuav tsis muaj zog raws li 45 degree kab pheeb ces kaum, nrog 50% ntau deflection nyob rau hauv off-axis dabtsi yog khoov thiab nro dua li nws yuav. Quasi-isotropic carbon fiber ntawv. Hauv ntau daim ntawv thov, 0º / 90º nplooj ntawv ua haujlwm zoo. Txawm li cas los xij, yog tias yuav tsum tau ua kom nruj raws li 45-degree axis, quasi-isotropic carbon fiber los xij yuav muab kev ua tau zoo dua. Quasi-isotropic carbon fiber los xij tuaj yeem ua los ntawm unidirectional lossis woven plies nrog cov lamination tsim nyog los tsim cov khoom tawv tawv nrog lub zog ntawm txhua qhov kev qhia.



Pawg kub

tawm ib tsab xov
Tham Online

Nyob zoo, thov tso koj lub npe thiab email ntawm no ua ntej sib tham hauv online kom peb tsis txhob nco koj cov lus thiab tiv tauj koj.