Thaum tshav kub kub deflection kub yog ib qho parameter uas qhia txog kev sib raug zoo ntawm cov cua sov thiab deformation ntawm cov khoom kuaj.
Siv ib qho kev thauj khoom rau cov khoom siv polymer lossis cov khoom siv polymer, ua kom sov ntawm qee qhov ceev, thiab ncav cuag qhov kub thiab txias thaum lub sijhawm deformation mus txog. Nws yog ib qho kev ntsuas kub ntawm cov khoom siv polymers lossis cov khoom siv polymer.