Kev ntxhov siab yog lub zog siv rau pob zeb thiab tuaj yeem ua rau deformation. Peb hom kev ntxhov siab yog ib yam ntawm peb hom phaj ciam teb: compression ntawm convergent ciam teb, nro ntawm divergent ciam teb, thiab shear ntawm hloov ciam teb. Qhov twg pob zeb deform plastically, lawv nyiam fold.
Qhov kev ntxhov siab hauv pob zeb tsim los ntawm qhov twg?
Thaum cov phiaj sib tsoo, txav sib nrug, thiab swb dhau ib leeg, ntau yam tshwm sim. Yuav luag tag nrho cov av qeeg, volcanic eruptions, thiab lub roob toj roob hauv pes tshwm sim ntawm cov ciam teb. Thaum cov phiaj raug thawb lossis rub, pob zeb raug kev ntxhov siab. Kev ntxhov siab tuaj yeem ua rau pob zeb hloov pauv lossis tawg.
Dab tsi ua rau pob zeb deform?
Nyob rau hauv lub ntiaj teb pob zeb tseem tab tom raug quab yuam uas nyiam khoov lawv, ntswj lawv, lossis tawg lawv. Thaum cov pob zeb khoov, twist lossis tawg peb hais tias lawv deform (hloov cov duab lossis loj). Lub zog uas ua rau lub pob zeb deformation yog hu ua kev ntxhov siab (Force/unit area).
Dab tsi yog qhov deformation los ntawm kev ntxhov siab?
Kev ntxhov siab tuaj yeem ua rau strain, yog tias nws txaus los kov yeej lub zog ntawm cov khoom uas muaj kev ntxhov siab. Txoj kev lim dej yog qhov hloov pauv ntawm cov duab lossis qhov loj me uas tshwm sim los ntawm kev siv zog (deformation). Pob zeb tsuas yog strain thaum muab tso rau hauv kev ntxhov siab. Txhua lub pob zeb tuaj yeem strained.
Kev ntxhov siab cuam tshuam li cas rau qhov deformation ntawm pob zeb?
Txhob Cia Siab RauRaws li pebtau tham yav dhau los, cov pob zeb nkig zoo li tawg thaum muab tso rau hauv qhov kev ntxhov siab txaus. Xws li kev tawg, thaum nws tsim cov kab nrib pleb tsis tu ncua hauv pob zeb, qee zaum tsim cov qauv tsim uas muab pov thawj ntawm kev ntxhov siab thaum lub sijhawm tsim cov kab nrib pleb.
