Official Answer
Answer
Lalacewar tsagi yana faruwa lokacin da damuwa mai matsa lamba akan bangon tsagi ya wuce ƙarfin amfanin kayan (S_{yh}$). Matsakaicin nauyin $P_g$ yana iyakance ta $P_g = \frac{D d S_{yh} \pi}{K}$. Yayin da bango ya lalace, yana haifar da tasirin 'ramp'. Ƙarfin axial a kan zobe sannan ya haifar da sashin radial $ F_r = P \ tan(\theta)$ inda $\theta$ shine kusurwar bangon da ya lalace. Da zarar $F_r$ ya wuce juzu'i da tashin hankali na radial na zoben, zoben yana faɗaɗa kuma an fitar da shi. Wannan ya zama ruwan dare yayin amfani da zoben karfe a cikin gidaje masu laushi (Aluminum ko Magnesium) ba tare da la'akari da wani abu mai girma na aminci ko tsagi mai zurfi ba.
