WIT Press


Residual Stress Measurement By The Introduction Of Slots Or Cracks

Price

Free (open access)

Paper DOI

10.2495/LD960031

Volume

13

Pages

15

Published

1996

Size

1,278 kb

Author(s)

I. Finnic & W.Cheng

Abstract

A relatively new approach for the experimental measurement of residual stress is outlined and extended. In essence, it makes use of strain measurement as a slot of progressively increasing depth is introduced into a body. For near- surface residual stress measurement the Nisitani "body force method" is used to determine residual stresses from strain measurement In cases in which through-the-thickness stress measurement is desired it is shown that many solutions may be obtained from procedures based on linear elastic fracture mechanics. Although the method requires more extensive prior numerical computation than traditional methods, it involves a simple experimental pro- cedure and in many cases leads to much greater precision in prediction of resi- dual stresses than traditional methods. 1 Introduction Residual stress i

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