p 0 7.112 lb/in 2 5.878 lb/in 2 4134 in 7.D7 p 0 7.112 lb/in 2 5.878 lb/in 2 4134 in For aluminum: For steel: cr 0 = 4 ~ 34 (0.098 t 2 + 0.0269 t 2 + 7.112 + 5.878) 2 516.34 t2 + 53,701 t2 psi cre ill!ro.284 t2 + 0.0779 t2 + 7.112 + 5. 878) t2 1486 t2 + 53,701 t2 psi Reca&~ing the previous equation involving KlC and substituting for a , 1000' Aluminum: 2 516 34 t2 + 53,701 2 (1. 4142) [ . l t2 < (22) 2 106 t2 Similarly, one can find in the case of a steel hull: (1.4142) 2 (1496 t2 + 53,701 2 t' l t' < ( 70) 2 10 6 2 2 Replacing "less than" by "equals" for the limiting case, obtain: (516.34 t2 + 53,701) 2 and (1496 t2 + 53,701) 2
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