80,000 



72,000 



64,000 



56,000 



40,000 



32,000 



24,000 



16,000 



8,000 



— , 



PRESSURE AT WHICH AVERAGE CIRCUMFERENTIAL / 

 STRESS = 200,000 PSI V / 



f 



/ 









\ 



/ 





/ 















/ 









PRESSURE AT WHICH AVERAGE 

 CIRCUMFERENTIAL STRESS 



= 100,000 PSI N^ 1 



y 





/ 



/ 







} 



/ 





/ 



^STIFFENED CYLINDERS 



] 





7 





/ 



r 



/ 





/ 









^ 



} 



^ 



/ 









y 





^ 



A' 



/^ ELAS 

 LONG 



/ h" \ B 





\d2xO.D./ 



riC BUCKLING PRESSURE 

 CYLINDER (MODIFIED) 



OF 







^ 



REFE 



FENCES 4 Af 



JD 5 





0.4 0.5 0.6 0.7 



WEIGHT OF NO. 7740 GLASS CYLINDERS 

 WEIGHT OF DISPLACEMENT IN SEA WATER 



1.0 



Figure 2a - Cylinders 



12 



