Table C-12. HydrostaHc Tesi- Data for Nominal 1.50-Inch (D;) -2.25-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 56-60 



(Sealed with grease; 



radial cl 



earance 0.005 to 0.010 inch 



; nominal 



Dq/D; ratio 1.5) 





Parameter 



Specimen Number 



Value 





















56 



57 



58 



59 



60 



Max 



Avg 



Min 



Thickness (in.) 



0.607 



0.604 



0.622 



0.620 



0.600 



0.622 



0.611 



0.600 



D^ (actual, in.) 



2.240 



2.239 



2.240 



2.239 



2.237 



2.240 



2.239 



2.237 



Temperature (°F) 



68 



67 



68 



68 



64 



68 



67 



64 



t/D| Ratio (actual) 



0.405 



0.402 



0.414 



0.413 



0.400 



0.414 



0.407 



0.400 



Pressurization Rate (psi/min) 



670 



665 



665 



668 



663 



670 



666 



663 



Pressure (psi) 



Axial D 



isplacems 



;nt of Cen 



ter Point 



on Window's Low- 



Pressure Face (in.) 



1,000 



0.002 



0.009 



0.011 



0.004 



0.001 



0.011 



0.005 



0.001 



2,000 



0.003 



0.015 



0.019 



0.012 



0.009 



0.019 



0.012 



0.003 



3,000 



0.008 



0.021 



0.024 



0.019 



0.012 



0.024 



0.019 



0.008 



4,000 



0.015 



0.028 



0.030 



0.025 



0.023 



0.030 



0.024 



0.015 



5,000 



0.021 



0.037 



0.039 



0.031 



0.030 



0.039 



0.031 



0.021 



6,000 



0.027 



0.043 



0.043 



0.038 



0.036 



0.043 



0.039 



0.027 



7,000 



0.034 



0.050 



0.053 



0.045 



0.043 



0.053 



0.045 



0.033 



8,000 



0.046 



0.057 



0.059 



0.053 



0.055 



0.058 



0.054 



0.046 



9,000 



0.059 



0.055 



0.068 



0.061 



0.070 



0.070 



0.065 



0.059 



10,000 



0.092 



0.073 



0.103 



0.104 



0.083 



0.104 



0.091 



0.083 



11,000 



0.117 



0.084 



0.146 



0.145 



0.114 



0.146 



0.121 



0.114 



12,000 



0.163 



Jy 



0.199 



0.186 



0.174 



0.199 



0.144 



0.163 



13,000 



0.228 





ly 



0.318 



J/ 



0.318 



0.273 



0.228 



14,000 



















15,000 



















Displacement at Failure (in.) 



0.392 

















Pressure at Failure (psi) 



13,300 



13,800 



13,075 



13,150 



13,000 



13,800 



13,265 



13,000 



J/ Deflection wire became disengaged. 



Notes: 



1. Grease liberally applied. 



2. 500-psi prelood. 



3. Cracking at about 9,000 psi and 13,000 psi 



60 



