1.104 



<> 



0.9 



0.8 



0.7 



0.6 



0.5 



0.4 



0.3 



0.2 



0.1 



^ 



? 



> 



o machined models with 

 local "flat spots" 



Omachined models with 

 local "thin spots" 



> 



> 



0.7 



Figure 7 - Elxperlmental Buckling Data for Machined Models with 



Imperfections 



12 



