2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
A zog shear yog a zog siv perpendicular rau ib qho chaw, nyob rau hauv kev tawm tsam rau ib qho offset zog ua yeeb yam nyob rau hauv qhov opposite direction. Thaum ib tus tswv cuab ntawm cov qauv kev ua tsis tiav los ntawm txiav , ob feem ntawm nws yog thawb indifferent cov lus qhia, rau piv txwv , thaum ib daim ntawv txiav los ntawm txiab.
Ib yam li ntawd, txhais li cas los ntawm lub zog shear?
A zog ua yeeb yam nyob rau hauv ib qho kev taw qhia thaum uas tig mus rau asurface los yog mus rau ib tug planar cross seem ntawm lub cev, piv txwv li lub siab ntawm huab cua nyob rau hauv pem hauv ntej ntawm ib tug dav hlau tis. Shearforces feem ntau ua rau txiav mob. Tsis kam ua li ntawd zog nyob rau hauv cov kua yog txuas nrog nws viscosity.
Ib yam li ntawd, shear force yog dab tsi rau cov menyuam yaus? Los ntawm Kev Kawm Cov me nyuam Shear stress yog a kev ntxhov siab xeev qhov twg cov duab ntawm cov khoom zoo li hloov (feem ntau yog "sliding" zog - torque los ntawm transversely-ua yeeb yam zog ) yam tsis muaj qhov hloov pauv tshwj xeeb.
Hais txog qhov no, txhais li cas los ntawm shear force diagram?
Shear quab yuam yog cov zog nyob rau hauv lub beamacting perpendicular rau nws longitudinal (x) axis. Shear forcediagrams tsuas yog cov phiaj xwm ntawm cov zog shear (ntawm lawv-axis) piv rau txoj hauj lwm ntawm ntau lub ntsiab lus raws kab (ntawm x-axis).
Lub zog shear raug xam li cas?
Khoov lub sijhawm yog ib txoj haujlwm ntawm lub zog x ua ddi. Yog tias zog Nws yog ib tug point load nws tsuas yog tus zog x qhov nrug [1] Yog hais tias lub zog yog distributionor kis tawm koj yuav tsum integrate lub zog thiab qhov deb [2]. Shear quab yuam yog lub luag haujlwm ntawm tag nrho zog thiab qhov chaw hla ntu [2].
Pom zoo:
Dab tsi yog qhov piv txwv piv txwv hauv kev txheeb cais?
Nyob rau hauv kev txheeb cais, sampling bias yog ib tug bias nyob rau hauv uas ib tug piv txwv yog sau nyob rau hauv xws li ib tug txoj kev uas ib co tswv cuab ntawm cov neeg npaj muaj ib tug tsawg sampling probability tshaj lwm tus
Dab tsi yog shear force hauv beam?
Shear force yog lub zog nyob rau hauv lub beam ua perpendicular rau nws longitudinal (x) axis. Lub hom phiaj Fordesign, nqaj lub peev xwm los tiv thaiv shearforce yog qhov tseem ceeb tshaj li nws lub peev xwm los tawm tsam lub zog. Lub zog shear ntawm qhov kawg ntawm lub beam yog sib npaug rau lub zog ntsug ntawm kev txhawb nqa
Dab tsi yog rau lub tshuab yooj yim thiab cov piv txwv ntawm lawv yog dab tsi?
Cov no yog rau lub tshuab yooj yim: cov nplais, lub log thiab lub qag, qib, lub dav hlau inclined, ntsia hlau, thiab lub log
Ib qho piv txwv ntawm kev lag luam uas tsis yog lag luam yog dab tsi?
Piv txwv ntawm kev lag luam uas tsis yog kev lag luam suav nrog tus kheej cov nyiaj tsim khoom los ntawm cov chaw tsim khoom lag luam uas lawv tsim ib feem, tus kheej cov nyiaj tsim khoom los ntawm cov tuam txhab tsis koom nrog cov tsev neeg (xws li cov khoom tsim tawm ntawm cov tswv lag luam thiab cov neeg ua liaj ua teb ua liaj ua teb), cov kev pabcuam muab rau cov zej zog xws li tag nrho los ntawm
Lub tuam txhab ntiag tug txwv piv txwv yog dab tsi?
Ib qho piv txwv ntawm lub tuam txhab ntiag tug txwv feem ntau yog ib lub khw muag khoom hauv zos, xws li lub khw lossis tsev noj mov, uas tsis muaj lub tebchaws nyob. Ib qho piv txwv ntawm lub tuam txhab kev txwv tsis pub tshaj tawm yog ib lub tuam txhab loj xws li cov khw muag khoom muag lossis cov khw noj mov nrog cov koom nrog uas txhua tus tuaj yeem yuav thiab muag