StressCheck Tutorial: Incorporating Contact Pressure Bleed in Resultant Extractions
Abstract: The term “bleeding” means that the tractions associated with the contact pressures may not be zero out of the contact region on their way to zero traction. This can affect the calculation of stress resultants, and therefore the load transfer feedback. Selection only the element faces inside the contact zone, or the contact zone itself, may not be sufficient to represent the stress resultant associated with the contact pressure.
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“As the United States Air Force continues to extend the service life of their aircraft the Aircraft Structural Integrity Program (ASIP) has had to refine the methods it uses to analyze and predict fatigue crack growth. Through the use StressCheck®, coupled with AFGROW, we in A-10 ASIP have been able to more accurately model, predict and analyze critical aircraft structure for the A-10 and other types of structure for non-A-10 system managers. This also allows us within the A-10 to more accurately assess risk for decision makers, streamline aircraft inductions into scheduled maintenance and reduce cost for total life cycle management.”
A-10 ASIP Manager