Cov khoom siv roj hmab yog cov khoom tsim los ntawm cov roj hmab, cov khoom siv roj hmab uas paub txog nws elasticity, resilience, thiab durability.Cov khoom siv roj hmab yog siv rau hauv ntau daim ntawv thov thoob plaws hauv kev lag luam xws li tsheb, kev tsim kho, aerospace, thiab cov khoom siv.Ib qho tseem ceeb ntawm cov khoom siv roj hmab yog lawv cov elasticity lossis yooj.Roj hmab muaj lub peev xwm tshwj xeeb rau ncab thiab tom qab ntawd rov qab mus rau nws cov qauv qub, ua rau nws zoo tagnrho rau cov ntawv thov uas yuav tsum tau nqus cov kev poob siab lossis kev co.