RESIDUAL STRESS DETERMINATION BY NON-DESTRUCTIVE METHODS SENSORS: NUMERICAL MODELING AND CONSTRUCTION

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Authors
  1. Roy, G.
Corporate Authors
Materials Technology Lab-CANMET, Ottawa ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Three methods of nondestructive residual stress determination, X-ray Diffraction (XrD), Magnetic Barkhausen Noise (MBN), and Electromagnetic Acoustic Transduction (EMAT) were used to determine known applied (through four-point jigs) stress states or residual stress states in steel and aluminum specimens and parts of steel engineering components. The results were compared with the stress states determined by two destructive methods, Hole Drilling Method (HDM), and Cut-and-Section Method (CSM). There was a two-part objective of this study: (1) to assess the accuracy of the methods on known stress tates, and (2) apply the methods to unknown stress states. The known stress states were applied to steel and aluminum specimens with simple geometries, such as slender bars and/or plates, instrumented with strain gauges, subjected to four-point bending, so that the surface stress components were calculated directly from strain readings and the unknown stress states were determined in such parts of engineering components as angled strips that are used to make high voltage transmission towers in Canada, and rolled steel that is used to make thin-wall pipes. The known stress states in the instrumented steel plates were determined by MBN and XrD, and in the aluminum bars by EMAT and XrD, whereas the unknown stress states were determined in the rolled steel by XrD and HDM, and in the angled strips by XrD, MBN, HDM, and CSM. TRUNCATED
Report Number
DREA-SR-97-002-PAP-37 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
8
DSTKIM No
98-01023
CANDIS No
507240
Format(s):
Hardcopy;Document Image stored on Optical Disk

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