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Proceedings Paper

Residual stress measurement using indentation and a radial in-plane ESPI interferometer
Author(s): Ricardo Suterio; Armando Albertazzi G. Jr.; Felipe K. Amaral; Anderson Pacheco
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Paper Abstract

A radial in-plane electronic speckle pattern interferometer (ESPI) has been developed by the authors’ group. This interferometer is used in this paper to measure residual stresses in combination with the indentation method. A semi-empirical mathematical model is developed to quantify the residual stresses. Several tests were made in a specimen with different levels of residual stresses imposed by a mechanical loading. Empirical constants were computed from those tests and are used in combination with the developed model to predict the residual stresses levels. The radial displacement field around a controlled indentation print is measured, processed and fitted to a mathematical model to predict residual stresses. Series of tests were designed and executed. Different indentation tip geometry and different loading conditions were involved. This paper presents the measurement principle, implementation details and results of the performance evaluation. The tests presented here are not complete since they are restricted to only one material, one-axis stress state, two indentation tip geometry and only one indentation force, but they are sufficient to encourage further development.

Paper Details

Date Published: 14 February 2005
PDF: 11 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611629
Show Author Affiliations
Ricardo Suterio, Univ. Federal de Santa Catarina (Brazil)
Armando Albertazzi G. Jr., Univ. Federal de Santa Catarina (Brazil)
Felipe K. Amaral, Univ. Federal de Santa Catarina (Brazil)
Anderson Pacheco, Univ. Federal de Santa Catarina (Brazil)

Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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