2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Vim, cov khoom siv hluav taws xob tsis muaj zog hauv shear. Li no cov ntaub ntawv ductile tsis ua hauj lwm tshwm sim vim lub hauv paus ntsiab lus shear stress. Hauv kev sim torsion qhov siab tshaj plaws shear stress yog nyob rau hauv cov kev taw qhia perpendicular mus rau longitudinal axis. Yog li ntawd, lub dav hlau tsis ua hauj lwm yog torsion yuav perpendicular mus rau longitudinal axis.
Puas shear tsis ua hauj lwm ductile los yog brittle?
Ntawm nruab nrab ntawm kev sib zog ua kom muaj kev ntxhov siab, brittle tus cwj pwm raug pom thiab shear fractures tsim thaum lub shear tsis ua hauj lwm nto (B thiab C). Nrog nce kev kaw, tus cwj pwm ua ductile thiab deformation ua ntau diffused (saum C).
Puas yog shear tsis ua haujlwm ductile?
Nyob rau hauv qhov tsis ua haujlwm, muaj tus yam ntxwv ductile shear nto kaum ntawm 45 ° rau cov khoom siv(Daim duab 8.3). Cov dav hlau 45 ° no sib haum rau cov dav hlau ntawm qhov siab tshaj plaws shear stress nyob rau hauv ib tug tswv cuab nyob rau hauv load. Tej zaum lawv kuj hu ua 'shear di ncauj' (Daim duab 8.1).
Yuav ua li cas cov ntaub ntawv tsis zoo?
Tag nrho cov lus teb (3) Los ntawm txhais, cov ntaub ntawv ductile yog cov uas tau txais cov yas deformation tseem ceeb ua ntej tawg. … Cov ntaub ntawv nkig tsis raug cov yas deformation tseem ceeb. Lawv yog li ua tsis tiav los ntawm kev rhuav tshem cov ntawv cog lus ntawm atoms, uas feem ntau yuav tsum muaj kev ntxhov siab ntawm daim ntawv cog lus.
Cov ntaub ntawv nkig puas ua tsis tau?
Qhov tsis ua tiav ntawm cov khoom siv nkig nyob rau hauv compressive shear loading tau piav qhiafeem ntau yog los ntawm kev sim kev tshawb nrhiav. Qhov tsis ua haujlwm yog nrog los ntawm kev tsim cov pob txha ua ke ntawm curvilinear lossis cov kab tawg, txhim kho raws txoj hauv kev ntawm cov dav hlau tseem ceeb.
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.
Puas yog cov ntaub ntawv sau tseg hauv cov tsiaj ntawv?
Daim Ntawv Ceeb Toom Phau Ntawv Qhia yuav raug muab sau ua cov tsiaj ntawv ib yam li cov qauv Cov Ntawv Qhia, Ua Haujlwm Tshaj Tawm, lossis Bibliography ua tiav, los ntawm tus thawj coj lub xeem lub npe lossis, yog tias tsis muaj tus sau, los ntawm thawj lo lus ntawm lub npe (tsis suav nrog a, ib, and the).
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?
