Answer
Madaidaitan dabarun bazara na igiyar ruwa suna ɗaukar siririyar katako inda tasirin curvature ba shi da komai. Koyaya, don maɓuɓɓugan ruwa inda rabon ma'anar diamita $D_m$ zuwa bangon radial $b$ bai wuce 10 ba, dole ne a yi amfani da ma'aunin gyaran curvature $K$. Yin amfani da gyare-gyaren tsarin hanyar Wahl don lallausan waya, $K = \frac{4C-1}{4C-4} + \frac{0.615}{C}$ inda $C = D_m/b$. Matsalolin da aka gyara $\sigma_c$ ya zama $\sigma_c = K \cdot \ frac{3 \pi P D_m}{4 b t^2 N^2}$. Wannan gyare-gyaren yana ba da lissafin rarraba ba tare da layi na fiber danniya a fadin radial giciye-sashe, inda diamita na ciki kwarewa da muhimmanci mafi girma matsawa danniya fiye da na waje diamita kwarewa a cikin tashin hankali, haifar da m da wuri-wuri samar da isasshen lokacin da kawai nominal danniya ne la'akari.
