Fatigue and Fracture Properties of High-Strength Steels

Fatigue and Fracture Properties of High-Strength Steels 

The most important metallurgical measures to improve the fatigue strength and fracture toughness of a steel are 

The static design pressure of the cylinder is derived based on the plastic limit load of the vessel using the von Mises criterion [10] and a design margin of 1.732 [11]. It is important to acknovrledge that this is only one of several possible design pressure definitions and for any specific case the applicable pressure design code must be consulted [10]. 

The initial yield of the pressure vessel occurs at the bore when the following yield condition according to Tresca/Guest is fulfilled [lOj  

The maximum elastic stress range that can be achieved through prestressing techniques is equivalent to two times the yield condition, since the bore of the vessel can only be prestressed to the compressive yield strength value. 

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