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2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Shear thiab dabtsi yog khoov daim duab kos yog ntsuas cov cuab yeej siv nrog kev txheeb xyuas cov qauv los pab ua cov qauv tsim los ntawm kev txiav txim siab tus nqi ntawm lub zog shear thiab dabtsi yog khoov lub sijhawm ntawm qhov taw tes ntawm cov qauv tsimxws li beam.
Dab tsi yog qhov tseem ceeb shear force daim duab thiab khoov lub sijhawm daim duab?
Daim duab lub zog shear qhia tias lub zog shear tiv thaiv los ntawm kab teeb raws li qhov ntev ntawm lub nqaj. Daim duab khoov lub sijhawm qhia tias lub sijhawm khoov tau tawm tsam los ntawm ntu ntu ntu raws qhov ntev ntawm lub nqaj.
Vim li cas shearing force tseem ceeb?
Shear yam ntxwv kuj tseem ceeb thaum ua tus yam ntxwv ntawm kev ncaj ncees ntawm kev sib raug zoo ntawm ob qhov chaw. … Txawm hais tias cov kev taw qhia ntawm lub zog sib txawv ntawm tensile (axial) thiab shear stresses, muaj kev sib raug zoo ntawm ob.
Qhov tseem ceeb ntawm shear force thiab dabtsi yog khoov lub sijhawm?
Ib lub zog quab yuam (SF) yog txhais tau tias yog cov lej ntawm cov lej ntawm txhua lub zog ntsug, sab laug lossis sab xis ntawm ntu. Lub sijhawm dabtsi yog khoov (BM) txhais tau tias yog algebraic sums ntawm lub sijhawm ntawm tag nrho cov rog nyob rau sab laug lossis sab xis ntawm ib ntu.
daim duab shear cuam tshuam li cas rau daim duab tam sim no?
Cov shear load yog nqes hav ntawm lub sijhawm thiab taw tes lub sijhawm ua rau dhiahauv daim duab tam sim no. Lub cheeb tsam nyob rau hauv daim duab shear sib npaug rauhloov nyob rau hauv lub sij hawm hla ntu txiav txim siab (txog ib qho kev dhia vim lub sijhawm taw tes). Sau tus nqi ntawm lub sijhawm ntawm txhua lub ntsiab lus tseem ceeb ntawm daim duab tam sim no.
Pom zoo:
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Nyob rau hauv cov khoom loj loj los ntawm cov studios loj, txhua tus neeg ua yeeb yamfeem ntau muaj ib lossis ntau tus pab, "inbetweeners" thiab "cov kws ua yeeb yam huv si", uas ua cov duab kos ntawm " qhov tseem ceeb poses"
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Carbohydrate overfeeding ua nce qib hauv carbohydrate oxidation thiab tag nrho cov kev siv hluav taws xobua rau 75-85% ntawm lub zog ntau dhau raug khaws cia. Tsis tas li ntawd, kev noj zaub mov ntau dhau muaj qhov cuam tshuam tsawg heev ntawm cov roj oxidation thiab tag nrho cov kev siv hluav taws xob, ua rau kev cia ntawm 90-95% ntawm lub zog ntau dhau.
Lub sijhawm kuv lub sijhawm dawb lossis thaum kuv lub sijhawm dawb?
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yog li, qhov no txhais tau tias "thaum kuv lub sijhawm dawb" tsis siv ntauthiab koj muab "hauv kuv lub sijhawm dawb" ntau dua nyob rau qhov kawg ntawm kab lus. Piv txwv li: Kuv tau taug kev tus dev thaum kuv lub sijhawm dawb.
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Vim li cas lub sijhawm lub tswv yim tsis meej pem rau cov menyuam muaj plaub thiab tsib xyoos? Plaub thiab tsib xyoos tsis nkag siab tias ntev npaum li cas ib teev lossis ib feeb. Lawv kuj tsis meej pem vim hais tias lub sij hawm tau piav ntau yam.
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Lub sij hawm saws ua haujlwm tib yam li a sij hawm sivua. … Lub sij hawm saws nyob rau hauv lub cav thiab tau txais lubrication los ntawm lub cav roj thiab yuav kav ntev, thaum lub sij hawm siv txoj siv sia nyob sab nraum lub cav thiab nyiam qhuav tawm thiab tawg.