Answer
Igishushanyo cya Goodman gifitanye isano no guhangayika ($ \ sigma_m $) hamwe no guhinduranya ($ \ sigma_a $) nimbaraga zikomeye zihenze ($ S_u $) hamwe n’urugero rwo kwihangana ($ S_e $). Ku isoko y'amazi, $ \ sigma_m = _x000c_rac {\ sigma_ {max} + \ sigma_ {min}} {2} $ na $ \ sigma_a = _x000c_rac {\ sigma_ {max} - \ sigma_ {min}} {2} $. Isoko ifatwa nkumutekano kubuzima butagira iherezo niba $ _x000c_rac {\ sigma_a} {S_e} + _x000c_rac {\ sigma_m} {S_u} <1 $. Mugukoresha inshuro nyinshi, nk'inshinge za lisansi, kunanirwa bikunze kubaho bitewe na micro-crack hejuru hejuru yumuraba. Kurasa kurasa bikunze gukoreshwa mugutangiza impungenge zisigaye hejuru, bigahindura neza aho ikorera hepfo kuri Diagram ya Goodman no kwagura umubare wizunguruka mbere yo gutangira.
