Figure B-14. Fragments of failure hole from 

 specimen 3-1. 



For simple- support specimens, 

 the ideal 4) of zero was not 

 obtained. The radial deflection of 

 the steel stiffener provided some 

 compliance. The stiffener deflection 

 was calculated to be about 0.01 inch 

 (0.3 mm) at a pressure load of 500 

 psi (3.5 MPa), or a 4) of 0.08. 

 Measured radial deflections showed 

 values about 0.02 inch (0.5 mm), a 







\ )\///// "°'^ ^ 



%^ \ 





120 



J 



\/^J^ 



^\ 



y- 



100 



80 



— - 





\ 7 



\J- 



60 



- 





\ 



- 



40 



- 



/l\j 



\ h 



- 



20 



/ 



\ \ 



// 



/.X/t'- 







-A, A 



, \ , A, 



v>(, 



360 330 300 270 240 210 180 150 120 90 60 30 



Circumference (Deg) 



Figure B-15. Post-implosion view of specimen 5-1 (t/D = 0.063, free support). 



61 



