Kev txhais ntawm kev txwv tsis pub tshaj
Qhov txwv pub tau los kuj tseem hu ua kev tswj qhov txaus. Thaum cov ntaub ntawv raug rau sab nraud quab yuam mus rau qee qhov kev txwv, nws tseem hla cov teeb meem loj yas deformation txawm tias tsis tau ua kom nce. Cov txiaj ntsig ntawm cov khoom siv yog cov kev ntxhov siab uas yuav tsum tau tsim kom muaj qhov ua kom tiav qhov teeb meem ntawm qhov quav. Thaum cov quab yuam sab nraud ntawm cov hnoos qeev ntawm cov khoom hlau tshaj qhov tsis pub dhau ywj ntawm cov khoom siv, txawm hais tias kev ntxhov siab tsis nce ntxiv, qhov kev kuaj me tseem tseem muaj teeb meem loj yas deformation. Qhov tshwm sim hu ua yielding, uas yog, thaum cov khoom siv raug rau sab nraud quab yuam rau qee yam, nws cov deformation tsis sib luag nrog rau sab nraud quab yuam thiab tsim cov yas hloov pauv, thiab qhov kev ntxhov siab thaum lub sij hawm yielding yog hu ua tawm txwv.