Answer
Edge cracking wani lahani ne na masana'anta wanda ke faruwa a lokacin murɗawa ko tambarin waya mai lebur, musamman a cikin kayan aiki masu ƙarfi kamar SAE 1090. Idan gefuna na waya suna da ƙananan burrs ko 'slitting cracks' daga tsarin birgima, waɗannan suna aiki azaman matsananciyar damuwa. A lokacin samar da raƙuman ruwa, gefen waje na raƙuman yana cikin tashin hankali. Idan damuwa na gida ya zarce taurin karaya $K_{IC}$, fashewa yana yaduwa. A cikin sabis, waɗannan fasa suna girma ta hanyar gajiya. Don yin nazarin wannan, ana yin gwajin ƙarfe na ƙarfe-sashe. Rigakafin ya haɗa da sarrafa na'ura mai 'kwankwasa baki' ko 'zagaye-baki' na waya kafin murɗawa don tabbatar da yanayi mai santsi, matsananciyar damuwa a gefuna, wanda daidaitaccen maɓuɓɓugan sararin samaniya.
