Strength of a Grooved Stud

Abstract

IT is commonly accepted that an abrupt change of section (such as a circumferential groove in a bar under the action of tension) will lead to a stress concentration at the root of the groove, and hence to a weakening of the bar in excess of that resulting from reduction in sectional area. That the bar is not necessarily weaker, but may be very much stronger, is now well established but is not generally recognized.