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Video: Dab tsi yog txoj cai ntawm kev sib xyaw rau cov khoom sib xyaw?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txoj cai ntawm Mixtures yog ib txoj hauv kev rau kev kwv yees kwv yees sib xyaw cov khoom siv, raws li kev xav tias a sib xyaw Cov cuab yeej yog qhov ntim hnyav nruab nrab ntawm cov theem (matrix thiab dispersed theem) cov khoom.
Nyob rau hauv no txoj kev, yuav ua li cas koj nrhiav tau lub Young's modulus ntawm ib tug composite khoom?
Cov Young's modulus ntawm Composite yog muab los ntawm 'txoj cai ntawm kev sib xyaw' piv txwv li EC = EF VF + EM VM, ib (VM + VF) = 1 or VM = (1 - VF). Cov elastic modulus raws cov kev taw qhia fiber ntau tuaj yeem tswj tau los ntawm kev xaiv qhov ntim feem ntawm cov fibers.
Ib tug kuj yuav nug, ua li cas koj pom qhov ntom ntawm cov khoom sib xyaw? Qhov ntom ntom ntawm cov khoom sib xyaw
- Nrhiav qhov ntom ntawm tag nrho cov tebchaw (lossis cov ntsiab lus) hauv qhov sib tov.
- Hloov txhua lub ntsiab lus lossis qhov sib xyaw ua ke qhov feem pua ntawm qhov sib xyaw ua ke rau tus lej lej (tus lej ntawm 0 thiab 1) los ntawm kev faib los ntawm 100.
- Muab txhua tus lej los ntawm qhov ntom ntawm nws cov khoom sib txuas lossis cov khoom sib txuas.
Ua raws li qhov no hauv kev xav, koj yuav ua li cas nrhiav tau lub zog tensile ntawm daim duab sib xyaw?
Lub zog ntawm Aligned Nruam Fiber Composites
- Matrix Modulus (Em) = 5GPa; Tensile zog (> sm) = 120 MPa; strain ntawm yield = 0.024; strain ntawm pob txha (>em) = 0.1.
- smatrix(> ef) yog qhov kev ntxhov siab nyob rau hauv matrix ntawm lub zog uas cov fibers tawg.
Dab tsi yog qhov ntim feem ntau hauv cov khoom sib xyaw?
Fiber ntau ntim ratio, los yog fiber ntim feem , yog qhov feem pua ntawm fiber ntau ntim nyob rau hauv tag nrho ntim ntawm ib tug fiber-reinforced sib xyaw khoom. Thaum tsim cov polymer sib xyaw , fibers yog impregnated nrog resin. Muaj fiber ntau ntim feem feem ntau ua tau zoo dua mechanical zog ntawm lub sib xyaw.
Pom zoo:
Puas yog kev sib xyaw cov khoom xyaw rau lub ncuav mog qab zib yog tshuaj lom neeg?
Cov ntaub ntawv yooj yim ntawm kev sib cais thiab sib xyaw yog suav tias yog kev hloov pauv ntawm lub cev, tab sis kev sib xyaw cov khoom xyaw ntawm lub ncuav mog qab zib tsis yog ib qho kev sib xyaw yooj yim. Kev hloov tshuaj pib tshwm sim thaum cov khoom xyaw sib xyaw, tsim cov tshuaj tshiab
Puas yog txoj cai ntawm kev sib xyaw ua ke siv tau rau cov khoom sib xyaw?
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Dab tsi yog qhov txawv ntawm txoj cai khoom thiab txoj cai saw?
Peb siv txoj cai saw thaum sib txawv ntawm 'kev ua haujlwm ntawm kev ua haujlwm', zoo li f(g(x)) feem ntau. Peb siv txoj cai khoom thaum sib txawv ntawm ob txoj haujlwm sib npaug ua ke, zoo li f(x)g(x) feem ntau. Tab sis nco ntsoov lawv yog cov haujlwm cais: ib tus tsis vam khom rau cov lus teb rau lwm tus
Albert Einstein txoj kev xav ntawm kev sib raug zoo hloov txoj cai ntawm kev txuag hluav taws xob li cas?
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Dab tsi yog qhov sib xyaw ntawm cov khoom sib xyaw?
Ib lub tebchaw muaj cov atom ntawm cov khoom sib txawv ntawm cov tshuaj sib xyaw ua ke hauv qhov sib piv ruaj khov. Kev sib tov yog ib qho kev sib xyaw ntawm ob lossis ntau yam tshuaj uas tsis muaj tshuaj lom neeg ua ke lossis cov tshuaj tiv thaiv. Kev sib xyaw. Cov tshuaj muaj cov ntsiab lus sib txawv hauv qhov sib piv ruaj khov uas tau hais tseg los ntawm cov ntawv cog lus tshuaj