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Open AccessArticle

Residual Stress Analysis Based on Acoustic and Optical Methods

Department of Chemistry and Physics, Southeastern Louisiana University, Hammond, LA 70402, USA
Department of Mechanical Engineering, Niigata University, Ikarashi Ninocho 8050, Nishi-ku, Niigata-shi, Niigata 950-2181, Japan
Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 139-743, Korea
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Gareth B. Neighbour
Materials 2016, 9(2), 112;
Received: 30 October 2015 / Revised: 30 January 2016 / Accepted: 2 February 2016 / Published: 16 February 2016
(This article belongs to the Special Issue Materials in Motorsport)
Co-application of acoustoelasticity and optical interferometry to residual stress analysis is discussed. The underlying idea is to combine the advantages of both methods. Acoustoelasticity is capable of evaluating a residual stress absolutely but it is a single point measurement. Optical interferometry is able to measure deformation yielding two-dimensional, full-field data, but it is not suitable for absolute evaluation of residual stresses. By theoretically relating the deformation data to residual stresses, and calibrating it with absolute residual stress evaluated at a reference point, it is possible to measure residual stresses quantitatively, nondestructively and two-dimensionally. The feasibility of the idea has been tested with a butt-jointed dissimilar plate specimen. A steel plate 18.5 mm wide, 50 mm long and 3.37 mm thick is braze-jointed to a cemented carbide plate of the same dimension along the 18.5 mm-side. Acoustoelasticity evaluates the elastic modulus at reference points via acoustic velocity measurement. A tensile load is applied to the specimen at a constant pulling rate in a stress range substantially lower than the yield stress. Optical interferometry measures the resulting acceleration field. Based on the theory of harmonic oscillation, the acceleration field is correlated to compressive and tensile residual stresses qualitatively. The acoustic and optical results show reasonable agreement in the compressive and tensile residual stresses, indicating the feasibility of the idea. View Full-Text
Keywords: residual stress analysis; acoustoelasticity; electronic speckle-pattern interferometry; scanning acoustic microscopy residual stress analysis; acoustoelasticity; electronic speckle-pattern interferometry; scanning acoustic microscopy
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Yoshida, S.; Sasaki, T.; Usui, M.; Sakamoto, S.; Gurney, D.; Park, I.-K. Residual Stress Analysis Based on Acoustic and Optical Methods. Materials 2016, 9, 112.

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