Ib qho piv txwv tseem ceeb ntawm kev ntxhov siab yog nruab nrab-Atlantic ridge, qhov chaw cov phiaj nqa North thiab South America mus rau sab hnub poob, thaum cov phiaj nqa Africa thiab Eurasia mus rau sab hnub tuaj. Kev ntxhov siab kuj tuaj yeem tshwm sim tau zoo hauv lub phaj uas twb muaj lawm, yog tias lub phaj uas twb muaj lawm pib faib nws tus kheej ua ob daim.
Tus piv txwv ntawm lub neej tiag tiag ntawm kev ntxhov siab hauv hlwb yog dab tsi?
Ntau qhov piv txwv ntawm lub neej tiag tiag ntawm kev sib zog yog:
rubing on a rope in a tug of war game. Lub tsheb thauj lwm lub tsheb nrog kev pab ntawm saw . rub txoj hlua ntawm lub qhov dej uas txuas nrog lub rubey.
Kev ntxhov siab yog dab tsi?
Kev ntxhov siab yog kev ntxhov siab uas nyiam rub qee yam sib nrug. Nws yog qhov kev ntxhov siab cuam tshuam rau ntawm qhov chaw, xws li lub dav hlau ua txhaum, uas tshwm sim los ntawm cov quab yuam siv perpendicular mus rau saum npoo los yog los ntawm cov chaw taws teeb uas kis tau los ntawm cov pob zeb nyob ib puag ncig.
Yuav ua li cas rau kev ntxhov siab thaum koj rub cov xab npum nrog koj txhais tes?
Siv shear stress txhawm xab npum. Ib txhais tes rub, lwm txhais tes rub down. Daim duab 6. Khoov cov xab npum ua rau kev sib xyaw ua ke, ob qho tib si nro thiab compression rog.
compressional tensional thiab shearing rog yog dab tsi?
Muaj peb lub zog tseem ceeb uas tsav kev deformation hauv ntiaj teb. Cov rog notsim kev ntxhov siab, thiab lawv ua los hloov cov duab thiab / lossis ntim ntawm cov khoom. … Kev ntxhov siab ua rau lub pob zeb luv. Tensional stresses ua rau lub pob zeb elongate, los yog rub sib nrug. Shear stresses ua rau pob zeb hla dhau ib leeg.
