Strength of a Grooved Stud

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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.

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  1. 1

    Petersen, R. E., ‘Stress Concentration Design Factors’ (John Wiley, New York,1953).

  2. 2

    Orowan, E., ‘Fundamentals of Brittle Behaviour in Metals’, Fatigue and Fracture of Metals Symposium at the Massachusetts Institute of Technology, 1950 (John Wiley, New York, 1952).

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HERBERT, D. Strength of a Grooved Stud. Nature 184, 897–898 (1959) doi:10.1038/184897b0

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