Answer
Lokacin kera maɓuɓɓugan ruwan raƙuman ruwa, waya ko tsiri ana jujjuya shi da sanyi sannan a naɗe. Wannan tsari yana ƙara ƙarfin yawan amfanin ƙasa amma yana rage ragowar filastik. Ana ƙididdige ainihin damuwa $ S$ a cikin bazara azaman $ S = \ frac{3 \pi P D_m}{4 n^2 b t^2}$. Dole ne a kwatanta wannan ƙididdigan danniya da ƙarfin samar da 'Aiki-Harded', ba ƙarfin da aka rufe ba. Don SAE 1070, aikin sanyi na iya ƙara ƙarfin ƙarfi daga $100$ ksi zuwa $200$ ksi. Koyaya, 'Sauran Damuwa' daga murɗawa dole ne a sami sauƙi ta hanyar maganin zafi na rage damuwa (yawanci $600^{\circ}F$ na awa 1). Idan ba a sarrafa ragowar matsalolin ba, bazarar za ta nuna 'creep' ko 'saita' yayin daɗaɗɗen ɗigon farko na matsawa, wanda zai haifar da asarar da aka ƙirƙira nan take.
