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TECHNICAL PAPERS

Stress Calculation Error Analysis for Incremental Hole-Drilling Residual Stress Measurements

[+] Author and Article Information
G. S. Schajer, E. Altus

Department of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel

J. Eng. Mater. Technol 118(1), 120-126 (Jan 01, 1996) (7 pages) doi:10.1115/1.2805924 History: Received July 17, 1994; Revised December 10, 1994; Online November 27, 2007

Abstract

The incremental hole-drilling method for measuring non-uniform residual stresses gives stress results that are very sensitive to errors in the measured data. The resulting stress errors can easily become large enough to compromise seriously the usefulness of the calculated stress results. This paper describes a straightforward method for calculating the stress range that has a specified probability of containing the actual residual stresses. Knowledge of this range allows informed interpretations of the stress results to be made. The four measurement error sources considered are: strain errors, hole depth errors, uniform hole diameter errors, and material constant errors. Both the Integral and Power Series stress calculation methods are investigated, and their different responses to measurement errors are described.

Copyright © 1996 by The American Society of Mechanical Engineers
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