Answer
Kunanirwa k'umunaniro mu masoko y'amazi mubisanzwe bitangirira kumpera y'imbere cyangwa hanze yinyanja yumuraba aho imihangayiko ikabije. Mugihe cyikizamini cyikurikiranya, intera ihangayikishije $ \ sigma_r = \ sigma_ {max} - \ sigma_ {min} $ igomba gusuzumwa hifashishijwe ibipimo byahinduwe neza. Niba impagarara zabazwe $ S = \ frac {3 \ cdot \ pi \ cdot P \ cdot D_m} {4 \ cdot b \ cdot t ^ 2 \ cdot N ^ 2} $ irenze imipaka yo kwihanganira ibintu (urugero, hafi 30-40% yimbaraga zingana kuri 17-7PH), micro-crack zizakwirakwira. Kunanirwa akenshi byihutishwa nubusembwa bwubuso nkibyobo cyangwa ibimenyetso byibikoresho biva mugikorwa. Kugira ngo ibyo bigabanuke, kurasa birashobora gukoreshwa kugirango habeho guhangayikishwa n’ibisigisigi bisigaye hejuru, bigahindura neza impagarara hagati kandi bikongerera ubuzima umunaniro kuva $ 10 ^ 5 $ ukagera kuri $ 10 ^ 6 $.
