1.0 



0.8 



1 



1 III 



- 



Z 0.6 



- 





- 



iH 









o 



u 









c 





/ l 





1 0.4 







- 



-a 

 in 









0.2 



1 



1 III 



- 



10 



20 



40 



60 



80 100 



200 



Length-to-Thickness or Diameter Ratio, 

 L/t or L/D 



Figure 3-1. Side adhesion coefficient as a function of length-to-thickness 

 or diameter ratio. 



= i(Az) 



(3-4) 



True (1977) recommends a value of 0.7 for C 



D 



and that S * be 

 e 



taken as 4, and that C- be 20 N-sec/m2 (4 lb-sec/ft2) 



Values for 6* 



are given in Figure 3-1 as a plot of 6* versus length-to-thickness or 

 diameter ratio. The values for 6* can also be calculated from the 

 formula 



35 



