Determination of residual stresses by thermal relaxation and speckle correlation interferometry

A new technique for the measurement of residual stresses is presented. The technique is based on strain measurements following thermal stress relaxation. The heat input is supplied by a low power infrared laser and the strain is measured with speckle pattern correlation inter-ferometry. This paper p...

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Veröffentlicht in:Strain 2002-11, Vol.38 (4), p.141-149
1. Verfasser: PECHERSKY, M. J
Format: Artikel
Sprache:eng
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Zusammenfassung:A new technique for the measurement of residual stresses is presented. The technique is based on strain measurements following thermal stress relaxation. The heat input is supplied by a low power infrared laser and the strain is measured with speckle pattern correlation inter-ferometry. This paper presents a comprehensive overview of the technique and an example of how it has been applied in a practical situation. Material is a stainless steel welded container.
ISSN:0039-2103
1475-1305
DOI:10.1046/j.1475-1305.2002.00030.x