Answer
Matsakaicin damuwa na fiber $ \ sigma$ a tsayin aikin da aka ba shi yana faruwa a magudanar raƙuman ruwa kuma ana ƙididdige su ta amfani da $\sigma = \ frac{3 \pi P D_m}{4 b t^2 N_w^2}$, inda $P$ shine kaya a wannan tsayin. Rarraba damuwa ba daidai ba ne saboda raƙuman ruwan raƙuman ruwa yana aiki azaman jerin ƙugiya mai lankwasa; lokacin lanƙwasawa ya fi girma a wuraren tuntuɓar (crests) kuma yana raguwa zuwa ga nodes. Don kayan kamar Inconel X-750, injiniyoyi dole ne su tabbatar da cewa wannan ƙididdige ƙididdigewa bai wuce mafi ƙarancin ƙarfin abin da ake samu a yanayin zafin aiki ba. Idan damuwa ya wuce kusan kashi 80 na ƙarfin yawan amfanin ƙasa, bazara na iya fuskantar saiti na dindindin (nakasar filastik), wanda galibi ana ƙira ta amfani da madaidaicin yanayin damuwa don maɓuɓɓugan ruwa mai juyawa da yawa don lissafin ainihin lissafin lissafi da gogayya tsakanin jujjuyawar.
