Official Answer
Answer
Rashin gajiya a maɓuɓɓugan ruwan raƙuman ruwa yawanci yana bayyana azaman tsaftataccen karaya mai kamanni mai kauri wanda ya fara daga ID na kololuwar igiyar ruwa ko kwari. Gwajin duban dan tayi (SEM) yawanci zai bayyana 'striations' wanda ke nuna yanayin ci gaban fashewar cyclic. Wurin farawa yawanci lahani ne ko yanki na damuwa mai tsayi. Don tantancewa, dole ne mutum ya lissafta iyakar damuwa $Δσ = σ_{max} - σ_{min}$. Idan wannan kewayon ya wuce iyakar juriya akan zane na Goodman ko S-N, gajiya ba makawa. Shirya matsala ya ƙunshi rage jujjuyawar bugun jini, ƙara adadin raƙuman ruwa $n$ (don rage damuwa a kowace igiyar ruwa), ko canzawa zuwa wani abu mai ƙarancin gajiya kamar 17-7PH maimakon carbon karfe.
