Residual Stress Evaluation by the Hole-Drilling Method With Off-Center Hole: An Extension of the Integral Method

[+] Author and Article Information
Dario Vangi

Dipartimento di Meccanica e Tecnologie Industriali, Università di Firenze, via di S. Marta, 3, 50139 Firenze, Italy

J. Eng. Mater. Technol 119(1), 79-85 (Jan 01, 1997) (7 pages) doi:10.1115/1.2805978 History: Received June 07, 1995; Revised June 22, 1996; Online December 05, 2007


With the incremental hole-drilling method, it is possible to evaluate residual stress variations with depth, acquiring strain values for each step by strain gages. These data can be processed by the integral method. Usually strain gages are not spaced equidistant from the hole center nor arranged in the radial direction, due to practical difficulties in drilling a centered hole. In this study we present a development of the integral method for evaluating stress variations with depth in the specimen for eccentric blind hole cases. The results can be extended and adopted for use with a non-conventional strain gage array.

Copyright © 1997 by The American Society of Mechanical Engineers
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