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J 



C 



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Figure 6 -- First Polaris-Firing Submarine GEORGE WASHINGTON 



SNAP ivm 



HEAD SHELL 



SUCKLING • BUCKLWG 



, DYNAMIC 

 CONCENTRATION Q EFFECTS 



- - STRESS "^ 



CYLWDER SHELL 'GENERAL CONCENTRATION 



CONICAL YELDING INGTABIUTY^ 



INTERSECTION 





5pM*** 



Figure 7 -- Possible Modes of Pressure Hull Failure 



