Table 3. Plasticity Reduction Factors for 16-Inch OD Specimens (after Ref 4) 



Specimen 

 No. 



Compressive 

 Strength 



Initial Elastic 



Modulus,'' 

 EjXlO^ (psi) 



Implosion 

 Pressure, 



Pirn (P^i) 



Average Wall 



Stress,"^ CTjp., 



(psi) 



"im 

 fc 



Long Cylinders 



Bresse's 

 Stress,'' 



(cim)B 

 (psi) 



°im 

 ("im'B 



f^, (psi) 



GOV" 



(%) 









t/D^j = 0.031; 



-ree End-Supported; L/D^ = «> 









1/2-10-N 



10,700 



2.3 



4.50 



376 



6,020 



0.56 



4,570 



1.32 



1/2-10-G 



10,900 



5.0 



4.54 



349 



5,580 



0.51 



4,610 



1.21 



1/2-6-N 



5,420 



3.9 



3.00 



203 



3,250 



0.60 



3,050 



1.07 



1/2-6-G 



5,760 



2.6 



2.60 



214 



3,424 



0.59 



2,640 



1.30 









1/0^ = 0.063; 



Free End-Supported; L/D^ = ■» 









1-10-N 



10,700 



1.5 



4.50 



1,110 



8,880 



0.83 



18,280 



0.49 



1-10-G 



10,480 



1.4 



4.32 



1,103 



8,820 



0.84 



17,550 



0.50 



1-6-G 



6,620 



1.9 



3.20 



543 



4,340 



0.66 



13,000 



0.33 



1-6-N 



5,920 



5.8 



3.10 



530 



4,240 



0.72 



12,590 



0.34 









t/D„ = 0.125; 



Free End-Supported; L/D^ = ■» 









2-10-G 



9,840 



3.2 



3.90 



2,335 



9,340 



0.95 



63,370 



0.15 



2-10-N 



9,950 



4.7 



4.24 



2,455 



9,820 



0.99 



68,900 



0.14 



2-6-N 



6,080 



3.0 



3.29 



1,387 



5,550 



0.91 



53,460 



0.10 



2-6-G 



6,060 



2.3 



3.36 



1,447 



5,780 



0.96 



54,600 



0.11 









t/DQ = 0.188; 



Free End-Supported; L/D^ = «> 









3-10-G 



10.350 



2.8 



4.10 



3,755 



10,010 



0.97 



149,910 



0.07 



3-10-N 



10,800 



2.2 



4.60 



4,107 



10,950 



1.01 



168,190 



0.07 



3-6-N 



7,000 



3.0 



2.94 



2,405 



6,410 



0.92 



107,490 



0.06 



3-6-G 



6,200 



2.2 



3.11 



1,980 



5,280 



0.85 



113,710 



0.05 



GOV = Coefficient of Variation 



*((T:„)r = 1.04 E. 



14 



