Dab tsi yog qhov tshwj xeeb cov cuab yeej cuab tam zoo ntawm fiberglass?
1. Lub zog tensile siab heev
Lub zog tensile ntawmfiberglassFeem ntau yog nyob ntawm 1.47 txog 4.8 GPa (gigapascals). Tus nqi no yog qhov tseem ceeb tshaj plaws:
Cov iav ntau dua: Nws yog kaum lub sij hawm muaj zog dua li nws cov khoom siv raw -molten thiab solidified bulk iav. Qhov no feem ntau yog los ntawm txoj kab uas hla me me uas tsim thaum lub sij hawm siab - cov txheej txheem nrawm nrawm, uas txo cov naj npawb thiab qhov loj ntawm qhov tsis xws luag sab hauv (xws li microcracks thiab impurities), raws li Griffith txoj kev xav tias "qhov me me, lub zog ntau dua."
Tshaj li lwm cov ntaub ntawv: Nws lub zog tsis yog tsuas yog siab dua ntau yam ntuj fibers (xws li paj rwb, linen, thiab txhob lo lo ntxhuav) thiab hluavtaws fibers (xws li nylon, polyester, thiab aramid), tab sis kuj nyob deb tshaj li ntawm cov ntaub ntawv alloy (xws li siab - lub zog steel, nws lub zog tensile feem ntau nyob rau hauv thaj tsam ntawm 0.8-Pa). Nws yog qhov tshwj xeeb muaj zog heev (lub zog / ntom) uas ua rau fiberglass yog qhov zoo tshaj plaws txhawb pob txha pob txha rau cov khoom sib xyaw.
2. Cim Elastic Modulus
Lub elastic modulus (Young's modulus) ntawm fiberglass yog qhov taw qhia ntawm nws qhov kev tiv thaiv rau elastic deformation.
Nws elastic modulus yog qis dua li ntawm cov hlau alloys feem ntau (piv txwv li, steel lub elastic modulus yog kwv yees li 200 GPa, thiab aluminium yog kwv yees li 70 GPa), tab sis ho siab dua cov organic fibers (xws li, polyester's modulus yog kwv yees li 5-15 GPa, thiab nylon yog kwv yees li 2-5 GPa).
Cov yam ntxwv ntawm cov qauv no, nruab nrab ntawm cov hlau thiab cov organic polymers, tso cai rau nws muab qhov tseem ceeb rigidity reinforcement nyob rau hauv composites thaum tuav zoo deformation compatibility nrog kuj mos resin matrices.
3. Tsis tshua muaj elongation ntawm tawg thiab zoo kawg nkaus Elastic cwj pwm
Lub elongation ntawm tawg ntawm fiberglass yog tsawg heev, feem ntau nyob ib ncig ntawm 3%. Qhov no txhais tau hais tias nws tawg nyob rau hauv tensile loads uas yuav luag tsis muaj cov yas deformation tseem ceeb.
Ntawm qhov tensile stress -strain curve, fiberglass tsis pom qhov txawv txav. Nws tus cwj pwm yog lub cev elastic zoo kawg nkaus: ua ntej tawg, kev ntxhov siab yog proportional to strain (raws li Hooke's Law), thiab deformation yuav luag zoo tag nrho tom qab unloading. Qhov no sib piv nrog ntau cov organic fibers (xws li nylon thiab polyester), uas, thaum ncab, feem ntau ua rau cov yas elongation tseem ceeb (irreversible deformation) ntxiv rau qhov pib elastic deformation theem, nthuav tawm qhov taw tes tawm.
Cov ntsiab lus
Fiberglass, nrog nws cov ultra- siab tensile lub zog (ntau tshaj ntawm cov iav ntau, organic fibers, thiab alloys), nruab nrab elastic modulus (siab dua cov organic fibers tab sis qis dua hlau), thiab tsis tshua muaj elongation ntawm kev tawg thiab zoo kawg nkaus elastic tus cwj pwm, tau tsim nws txoj hauj lwm raws li ib tug core reinforcing cov ntaub ntawv rau siab - cov ntaub ntawv ua tau zoo. Qhov kev sib xyaw ua ke ntawm cov khoom siv kho tshuab tshwj xeeb no- lub zog siab, siab nruj, thiab tawg tawg yooj yim- ua kom nws muaj peev xwm ua tau zoo hauv cov khoom siv sib xyaw, muab cov khoom siv kho tshuab tseem ceeb rau cov khoom kawg xws li cov khoom siv tsheb, cua turbine hniav, nkoj, thiab cov khoom siv ncaws pob. Kev nkag siab thiab tswj cov khoom siv kho tshuab no yog qhov tseem ceeb rau kev txhim kho cov khoom siv sib xyaw thiab ua kom lawv cov kev ntseeg tau zoo.
