2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov khoom tuaj yeem yog dawb huv lossis tsis huv, muaj sia lossis tsis muaj sia. Cov ntaub ntawv tuaj yeem raug cais raws li lawv lub cev thiab tshuaj lom neeg, lossis ntawm lawv cov keeb kwm geological lossis kev ua haujlwm lom neeg.
Kev faib cov ntaub ntawv yog dab tsi?
Cov khoom siv tau yooj yim tau muab faib ua peb yam kev faib tawm: metals, ceramics, thiab polymers. Cov tswv yim no yog ua raws li cov tshuaj pleev ib ce thiab cov qauv atomic, thiab cov ntaub ntawv feem ntau poob rau hauv ib pawg los yog lwm qhov, txawm tias muaj qee qhov nruab nrab.
3 qhov kev faib khoom yog dab tsi?
Kev lig kev cai peb cov khoom tseem ceeb yog metals, polymers, thiab ceramics. Piv txwv ntawm cov no yog hlau, ntaub, thiab tais diav.
5 yam khoom siv yog dab tsi?
Peb siv ntau yam khoom sib txawv txhua hnub; tej zaum yuav muaj xws li:
- metal.
- plastic.
- ntoo.
- iav.
- ceramics.
- Ysynthetic fibers.
- khoom sib xyaw (ua los ntawm ob lossis ntau yam khoom ua ke)
tsib qhov kev faib khoom yog dab tsi?
Cov ntaub ntawv engineering tuaj yeem faib ua ntau yam xws li: a) Ferrous Metalsb) Cov hlau tsis muaj hlau (aluminium, magnesium, tooj liab, npib tsib xee, titanium) c) Plastics (thermoplastics, thermosets) d) Ceramics thiab Pob zeb diamond e) Composite Materials & f) Nano-materials.
Pom zoo:
Cov ntaub ntawv qhia ntawv puas txhawb nqa cov ntaub ntawv kawm?
Cov ntaub ntawv qhia yuav tsum txhawb nqa txoj kev kawm lub tswv yim, cov hom phiaj thiab cov hom phiaj ntawm Cheeb Tsamthiab cov hom phiaj ntawm cov ntaub ntawv kawm uas cov ntaub ntawv yuav raug siv. … Cov ntaub ntawv qhia yuav tsum ua tau raws li cov qauv zoo ntawm cov ntsiab lus tseeb thiab kev nthuav qhia.
Cov ntaub ntawv hom twg raug zam los ntawm kev txo qis thiab kev cais tawm?
Cov lus qhia txo qis yuav tsum tsis txhob siv rau cov ntaub ntawv uas muaj tsoomfwv cov ntaub ntawv txawv teb chaws lossis Cov Ntaub Ntawv Txwv lossis Cov Ntaub Ntawv txwv yav dhau los. Txhua daim ntawv teev npe yuav tsum qhia kom meej raws li qhov ua tau, cov ntaub ntawv twg hauv nws tau muab cais tawm thiab qib twg.
Thaum cov ntaub ntawv tshiab cuam tshuam nrog kev muab cov ntaub ntawv qub no hu ua?
Nrog retroactive cuam tshuam, cov ntaub ntawv tshiab cuam tshuam lub peev xwm rov qab cov ntaub ntawv qub. Nrog kev cuam tshuam tsis zoo, nws yog qhov rov qab: cov ntaub ntawv qub cuam tshuam qhov rov qab los ntawm cov ntaub ntawv tshiab tau kawm.
Puas yog cov ntaub ntawv sib tw cov ntaub ntawv raug cai?
Kev tsim "Cov ntaub ntawv cog lus" yog cov ntaub ntawv sau uas txhais lub luag haujlwm, kev lav phib xaub, thiab "Ua haujlwm" raws li Daim Ntawv Cog Lus Tsim Kho, thiab raug cai lij choj rau ob tog (Tswj thiab tus neeg cog lus).
Cov ntaub ntawv twg muaj cov ntaub ntawv bituminous?
Nws muaj ob chav kawm ntawm cov khoom siv bituminous: (1) asph alt; thiab (2) tar. Cov ntaub ntawv no feem ntau yog siv los ua dej-pov thawj sealants, thiab ua cov ntaub ntawv los tuav cov aggregate ua ke nyob rau hauv bituminous pavements. Dab tsi yog cov khoom siv bituminous?
