▁albums ▁Category : Em Ar cy ▁Records ▁albums <0x0A> </s> ▁In ▁continu um ▁mechan ics , ▁the ▁term ▁E sh el by ' s ▁inclusion ▁or ▁E sh el by ' s ▁inclusion ▁problems ▁refers ▁to ▁a ▁set ▁of ▁problems ▁involving ▁elli ps oid al ▁el astic ▁inclus ions ▁in ▁an ▁infinite ▁el astic ▁body . ▁ ▁Anal yt ical ▁solutions ▁to ▁these ▁problems ▁were ▁first ▁de vised ▁by ▁John ▁D . ▁E sh el by ▁in ▁ 1 9 5 7 . ▁ ▁E sh el by ▁started ▁with ▁a ▁thought ▁experiment ▁on ▁the ▁possible ▁stress , ▁stra in , ▁and ▁disp lacement ▁fields ▁in ▁a ▁linear ▁el astic ▁body ▁containing ▁an ▁inclusion . ▁ ▁In ▁particular , ▁he ▁considered ▁the ▁situation ▁in ▁which ▁the ▁inclusion ▁has ▁under g one ▁a ▁transformation ▁( such ▁as ▁tw in ning ▁or ▁local ized ▁thermal ▁expansion ) ▁but ▁its ▁change ▁in ▁shape ▁and ▁size ▁are ▁restricted ▁because ▁of ▁the ▁surrounding ▁material . ▁ ▁In ▁that ▁situation , ▁the ▁inclusion ▁and ▁the ▁surrounding ▁material ▁remains ▁in ▁a ▁str essed ▁state . ▁Also ▁the ▁stra in ▁states ▁in ▁the ▁body ▁and ▁the ▁inclusion ▁are ▁potentially ▁in hom ogeneous ▁and ▁complicated . ▁ ▁E sh el by ▁found ▁that ▁the ▁resulting ▁el astic ▁field ▁can ▁be ▁found ▁using ▁a ▁" sequence ▁of ▁imag inary ▁cutting , ▁stra ining ▁and ▁w eld ing ▁operations ." ▁ ▁E sh el by ' s ▁finding ▁that ▁the ▁stra in ▁and ▁stress ▁field ▁inside ▁the ▁elli ps oid al ▁inclusion ▁is ▁uniform