E 

 "e 0.5 



elastic 

 buckling 



material failure 

 when tT;„ = f ' 



inelastic 



buckling 



(fitted curve) 



Dg = 54 in. (1372 mm) 

 L = 127 in. (3225 mm) 



Simple Support End Condition 

 f(! = 8,000 psi (55 MPa) 



Figure 5. Implosion of moderately long cylinder specimens with D = 54 in. (1372 mm). 



.i 0.5 





1 



1 



\ 





1 





1 







^ \ 









Free End Condition 







-^ % \ 



\ 



material failure 

 when a;^ = f^ 





f^ = 8,000 psi (55 MPa) 





elastic 



\ ^ 





buckling 



o\ 



\ 











inelastic 



> 



\ 









1 



buckling 

 (fitted curve) 



1 





O 



1 



^ 



1 



Figure 6. Implosion of long cylinder specimens with D = 54 in. (1372 mm). 



15 



