Journal ArticleDOI
Holographic method giving stress levels and visualization of defects in thick cylinders
TLDR
In this paper, the holographic determination of stress levels in a defect-free tube and in the sound section of a tube containing defects was performed using thin cylinder theory, and the tube surface area adversely affected by the defects was visualized.Abstract:
The holographic determination of stress-levels in a defect-free tube and in the sound section of a tube containing defects. A comparison with stress values using thick cylinder theory is given, and the tube surface area adversely affected by the defects is visualized, Size of defects detectable are also given.read more
Citations
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Proceedings ArticleDOI
Status And Future Of Holographic Nondestructive Evaluation
TL;DR: An evaluative review of the literature of holographic NDE is summarized in this article, where articles and reports are tabulated and categorized according to flaw type and techniques of object loading during holographic inspection.
Patent
Method for measuring optical strain and apparatus therefor
TL;DR: In this paper, a method and an apparatus for optical strain measurement are disclosed, prior to deformation or loading of the object to be tested, the latter is provided with a thin transparent film which adheres well to the object and has a thickness between 3 and 20 μm.
Journal ArticleDOI
Laser holographic and speckle photography methods for defect detection and strain evaluation in pressure vessels
TL;DR: In this article, the authors give holographic methods, both conventional and new, for the detection of defects in tubes, and they also give strain values in front of a crack tip in a 75 mm thick pressure vessel by speckle photography.
Proceedings ArticleDOI
Holographic NDT On Pipes: Predicted Fringe Patterns And Experimental Results
TL;DR: In this paper, the expected interferograms have been simulated with a mathematical model which embodies elastic deformation as well as rigid body motion, and experimental verification of the model shows that it may be used for software compensation of rigid body motions, and for measurement of bending, torsion, pressure, and thermal expansion.
References
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Journal ArticleDOI
Applications of holography and speckle photography to the measurement of displacement and strain
E Archbold,A E Ennos +1 more
TL;DR: In this paper, the authors used a combination of live and double-exposure techniques to investigate the bending moment along an axial surface generator of a pipe joint, and obtained the surface strain using speckle photography.