440 



Figure 1 - The buckling pressure P and number of lobes n as functions 

 of the parameters L/2R and a/2R, 





o 



o 

 o 



VO •>* CM_ 0_ 



o 

 o 

 00 



990 



O O o 



o 

 o 

 ro 



000 

 o 00 10 



CM ■-<.-■ ,-:> 



o 



CM 



o 

 o 



o 

 CO 



o 



o 



o 



n 



oo 



CM 



(rsd)d 



