Answer
Lalacewar tsagi yana faruwa lokacin da nauyin axial $P$ ya zarce ƙarfin yawan amfanin ƙasa na kayan tsagi, ko da riƙon zoben da kansa ya ci gaba da kasancewa. Wannan na kowa ne lokacin da ake amfani da zoben ƙarfe masu ƙarfi a cikin gidaje masu laushi na aluminum ko filastik. Zoben ya 'nutse' a cikin bangon tsagi, yana haifar da 'fasa mai tsinke'. Yayin da nauyin ya karu, wannan farfajiyar da ta tashi ta haifar da karfin radial na waje wanda a ƙarshe zai fitar da zobe daga cikin tsagi. Ana nazarin gazawar ta amfani da dabara don ɗaukar matsi: $\sigma_b = P / (\pi \ cdot D \ cdot d) $. Idan $\sigma_b$ ya zarce ƙarfin samar da gidaje, gazawar na nan kusa. Gyaran shine ƙara zurfin rami $ d$, yi amfani da kayan gida mai ƙarfi, ko amfani da bangon radial mai faɗi $ b$ akan zobe don yada kaya.
