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RESEARCH PAPERS

Notch Effects, Stress State, and Ductility

[+] Author and Article Information
Alice M. Agogino

General Electric Company, Advanced Reactor Systems Department, Sunnyvale, Calif. 94086

J. Eng. Mater. Technol 100(4), 348-355 (Oct 01, 1978) (8 pages) doi:10.1115/1.3443503 History: Received June 12, 1978; Revised July 07, 1978; Online August 17, 2010

Abstract

A review of the literature on testing of notched specimens is provided with emphasis on short-term notched bar tension tests. The effects of notch geometry, stress state, and smooth-bar tensile properties on notched ductility, notch sensitivity, and mode of fracture are discussed. For design against failure due to notch weakening, a simple criterion based on a limiting value of notched ductility is proposed. Notched ductility for the metals considered in this study, can be approximated by the reduction in and from a smooth tension test divided by a tensile stress triaxiality factor that is proportional to the ratio of hydrostatic to octahedral shearing stresses associated with the notch.

Copyright © 1978 by ASME
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