تعيين فشار بهينه اتوفرتاژ با درنظر گرفتن اثر باشينگر و اثر لايه برداري

A method for defining autofrettage optimum pressure is presented. This method combines a fatigue life criterion for the vessel with a strength criterion. The optimum autofrettage pressure is obtained based on actual loading-unloading material behavior. This value is compared with the value obtained using ideal models. Material removal effect on this value is also studied. It is shown that consideration of the Bauschinger effect has a significant influence on the optimum pressure level. Several case studies are reviewed and discussed.