38. As illustrated in Figure 6, the individual principal stresses for 

 a given structure can be expressed as exceedance probability functions (EPFs) . 

 The preliminary principal stress joint EPF can be determined by combining the 

 individual EPFs from the static, pulsating, and impact responses. This 

 requires that the individual responses be independent. There is negligible 

 error in this assumption because the static response is independent from the 

 pulsating and impact responses. The question of independence of pulsating and 

 impact response is not addressed because, within this design procedure, only 

 the combination of static and pulsating stress distributions is given, for 

 reasons discussed in the previous section. 



DETERMINE DESIGN STRESS LEVEL 



Static 



Pulsating 



Impact 



a, 



Principle Stress 



Proceed with Intermediate 

 Dolos Design 



Figure 6. Preliminary dolos structural design 



21 



