120 



100 



40 



20 



-20 



-60 



-80 





h- ^ 



^ Y 

















/ 1 





1 1 1 



S 





" > EXPERIMENTAL (MODEL EC-l) 





D 



THEOf 



OF CU 



?ETICAL (USING 

 RVATURE ) 

 ^ETICAL (REF.8 



LOCAL RADIUS 



) 



C 











D 





--^ 









/ 











D 



/ 



^"----^ 



rS 







,'"" 



^'-' 







5-- 



< 



y^ / 













/ 



Ax 











f 



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0.1 



X/l 



0.5 



Figure 18 — Stress Distribution on Inside Surface of the Shell at the Major Axis 



23 



