The Electronic Laser Interferometry and Laser Heating Method for Residual Stress Determination

Residual stress is one of the causes which makes defects in engineering components and materials. These residual stresses can occur in many engineering structures and can sometimes lead to premature failures. There are commonly used methods by which residual stresses are currently measured. But thes...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2000-07, Vol.14 (7), p.715-721
Main Authors: KIM, K.-S, KANG, Y.-J, RHO, K.-W, RYU, W.-J
Format: Article
Language:English
Subjects:
Biological and medical applications
Computational techniques
Electronics
Exact sciences and technology
Finite element analysis
Finite element method
Finite-element and galerkin methods
Fundamental areas of phenomenology (including applications)
Heating
Industrial applications
Interferometry
Laser interferometry
Lasers
Mathematical analysis
Mathematical methods in physics
Mathematical models
Optics
Physics
Residual stress
Studies
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Summary:Residual stress is one of the causes which makes defects in engineering components and materials. These residual stresses can occur in many engineering structures and can sometimes lead to premature failures. There are commonly used methods by which residual stresses are currently measured. But these methods have a little damage and other problems; therefore, a new experimental technique has been devised to measure residual stress in materials with a combination of electronic laser interferometry, laser heating and finite element method. The electronic laser interferometer measures in-plane deformations while the laser heating and cooling provides for very localized stress relief. FEM is used for determining the heat temperature and other parameters. The residual stresses are determined by the amount of strain that is measured subsequent to the heat-up and cool-down of the region being interrogated. A simple model is presented to provide a description of the method. In this paper, the ambiguity problem for the fringe patterns has solved by a phase shifting method.[PUBLICATION ABSTRACT]
ISSN:1226-4865
1738-494X
1976-3824
DOI:10.1007/BF03184456