ISSN: 1546-962X
Page Count: 13

Full-field Laser Shearography Instrumentation for the Detection and Characterization of Fatigue Cracks in Titanium 10-2-3
Groves, RM
Research Fellow, Senior Lecturer and Professor, School of Engineering, Cranfield University,

Furfari, D
Ph.D. Student, and Professor, School of Industrial and Manufacturing Sciences, Cranfield University,

Barnes, SE
Ph.D. Student and Lecturer, School of Engineering, Cranfield University,

James, SW
Research Fellow, Senior Lecturer and Professor, School of Engineering, Cranfield University,

Fu, S
Ph.D. Student and Lecturer, School of Engineering, Cranfield University,

Irving, PE
Ph.D. Student, and Professor, School of Industrial and Manufacturing Sciences, Cranfield University,

Tatam, RP
Research Fellow, Senior Lecturer and Professor, School of Engineering, Cranfield University,

(Received 17 June 2004; accepted 27 January 2006)

Abstract

A multi-component shearography instrument is used to investigate the in-plane surface strain fields in titanium 10-2-3 alloy specimens subjected to tensile loads. Titanium 10-2-3 alloy samples containing fatigue cracks with lengths from 0.7 to 5 mm were investigated using the shearography instrumentation. In-plane and out-of-plane measurements of surface strain are presented, along with comparative data from resistance strain gages. Factors determining the detection sensitivity, the limit of detection for crack lengths, and the accuracy of the strain field were established.

Keywords:
full-field, shearography, strain measurement, fatigue cracks, instrumentation

Paper ID: JAI12757
DOI: 10.1520/JAI12757
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