1-9 

 10 

 11 

 12 

 13 

 14 

 15 



Gage Type 



AR-7-2 (45°l 

 AFX7 

 AFX7 

 AFX7 



A-1 



A-19 



A-19 



10 



J 11 



J 12 



Segmented Wall. The 



segmented-wall vessel was tested 

 with internally applied hydrostatic 

 pressure in the same manner and 

 at the same temperature as the 

 stacked-ring pressure vessel (Figure 26). 

 The testing of this vessel took place 

 in two steps that were also dictated 

 by the failure of structural compo- 

 nents at different pressure levels. 



The first test consisted of 

 pressurizing the segmented vessel 

 (Figure 27) until the test was termi- 

 nated at 140 psi by the tensile failure 

 of the shear pins holding the laminated 

 end-closure retaining ring together. 



The second test consisted 

 of pressurizing the segmented wall 

 to destruction at 180 psi of internal 

 hydrostatic pressure (Figure 28). 

 For this test, the segmented-wall 

 cylinder was positioned between 

 two flat steel end plates held 

 together by steel tie rods. The setup 

 was identical to the one used for 

 testing a stacked-ring cylinder to 

 destruction. 



Figure 21. Location of electrical 

 resistance strain gages 

 on the stacked-ring 

 pressure vessel model. 



FINDINGS 

 Stacked- Ring Vessel 



1 . The highest principal stresses 

 were measured on the surface of 

 the hemispherical end closures. 

 Since the highest principal stress was recorded in meridional direction at 

 rosette 4, while the hoop stress at rosette 4 was no larger than at rosettes 3, 

 2 and 1 , it appears that considerable flexural stress exists at the base of the 

 hemispherical dome in meridional plane (Figures 23 through 34). 



28 



