Answer
Ana nazarin gazawar gajiya a maɓuɓɓugan ruwan raƙuman ruwa ta hanyar kimanta madaidaicin damuwa $\sigma_a$ da ma'anar damuwa $\sigma_m$. Amfani da Modified Goodman equation: $\sigma_a / S_e + \sigma_m / S_{ut} = 1/n$, inda $S_e$ shine iyakar juriya kuma $S_{ut}$ shine ƙarfin juriya na ƙarshe. A cikin aikace-aikacen kama, zagayowar bazara tsakanin tsayin da aka riga aka yi lodin $H_1$ da tsayin aiki $H_2$. Idan damuwa mai ƙididdigewa a $ H_2 $ ya wuce iyakar gajiya na abu (misali, SAE 9254 ko 17-7PH), ƙananan ƙwayoyin cuta suna farawa a diamita na ciki inda damuwa mai ƙarfi ya fi girma yayin matsawa. Binciken gazawa yawanci yana bayyana 'alamomin rairayin bakin teku' ko striations masu nuni da lodin keken keke. Ragewar ya ƙunshi ƙara adadin raƙuman ruwa $n$ don rage damuwa a kowane igiyar ruwa ko yin amfani da tsari na harbi don haifar da matsananciyar damuwa a saman.
