J.'t0.2 Jl-13.; 



OUTER SHELL < 

 i 



'//m 





y. . / . . ////// 



///////A 









f-177 X,-42 



- 2 



J.'- 14 .7 J.' -6 3 



% 





MODELS OV-I, 

 OV- 3, AND OV-4 

 (ORIGINAL DESIGN) 



INNER SHELL < 



mm:r"'/"m 



/A//////> 











-P.-3.4 y^-n.s 



1 ' 

 Figure 7o 









OUTER SHELL 



INNER SHELL 



r-27 1' 



T.-'^^ T^- 



^l"-0.9 JJ- 



Figure 7b 



MODEL OV-2 



(BALANCED STRESS DESIGN) 



StresB values were computed from 

 analyals of Reference 3, with an 

 assumed value of 0.33 as Poisaon's 

 ratio, and are given in pal per pal of 

 pressure. Values shown in this 

 figure represent the circumferential 

 and longitudinal shell stresses and 

 are written ve'rtically and horizon- 

 tally, respectively. 



OUTER SHELL 



J_'-t-0.7 \l -13.8 



INNER SHELL 



MODEL OV-5 

 (SUGGESTED REDESIGN) 



Figure 7c 



Figure 7 - Theoretical Stress Intensity in Critical Shell 

 Regions for the Three Designs Investigated 



11 



