Answer
Matsakaicin yawan damuwa $\sigma$ a bakin magudanar ruwa ana bayyana ta $\sigma = _x000c_rac{3 imes au imes P imes D_m}{b imes t^2 imes N^2}$ inda $P$ shine kaya. Koyaya, daidaitaccen ka'idar katako mai layi sau da yawa tana ƙasƙantar tsinkayar damuwa saboda karkatar da kintinkiri. Ana amfani da ma'aunin gyara $K$, wanda aka samo daga rabon $D_{out}/D_{in}$. Yayin da rabon $D_{out}/D_{in}$ ya karu, yawan damuwa a diamita na ciki na igiyar igiyar ruwa yana ƙaruwa. A cikin aikace-aikacen gajiya mai tsayi (misali, watsawa na mota), idan ƙididdigar ƙididdigewa ta wuce ƙaramin ƙarfi na kayan (misali, $ 200,000 $ PSI don Carbon Karfe SAE 1070), bazara zai sha wahala daga saiti na dindindin ko gazawar gajiya. Yawancin lokaci muna ƙira don matsakaicin matsakaicin 80% na yawan amfanin ƙasa don aikace-aikacen a tsaye da 50% don aikace-aikace masu ƙarfi.
