3. Radial displacement data for the specimens showed that the 

 deflected shape for the free-support cylinders had two lobes (n = 2) 

 and for the simple- support cylinders had three lobes (n = 3). The 

 membrane and bending radial displacements were determined, and esti- 

 mates of strain were calculated at the failure location. It appeared that 

 at the worst flat spot the strain level at failure was slight tension on 

 the inside waU and about 4,000 pin. /in. compression on the outside 

 wall. 



80 



