RESEARCH PAPERS: New Investigations Relating to Stress Concentrations Under Creep Conditions

Trends and Implications of Data on Notched-Bar Creep Rupture

[+] Author and Article Information
H. R. Voorhees

Department of Chemical and Metallurgical Engineering, University of Michigan, Ann Arbor, Mich.

J. W. Freeman

University of Michigan, Ann Arbor, Mich.

J. A. Herzog

Advanced Metallurgical Studies Branch, Directorate for Materials and Processes, Aeronautical Systems Division, U. S. Air Force, Wright-Patterson Air Force Base, Ohio

J. Basic Eng 84(2), 207-213 (Jun 01, 1962) (7 pages) doi:10.1115/1.3657279 History: Received August 31, 1961; Online November 04, 2011


Extended research on creep rupture of notched specimens, conducted at the University of Michigan under Air Force sponsorship, is analyzed along with recent publications of others. The combined results suggest that notch strengthening is general for all alloys studied under some test conditions and is not specific to individual materials or to a given ductility level. Quantitative explanation of notch rupture behavior in terms of unnotched-specimen properties is handicapped by present uncertainties in the basic factors controlling creep-rupture life under variable multiaxial stress.

Copyright © 1962 by ASME
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