| a transmission replica system for strain measurement |
JUN 79 |
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| Authors:
f. a. a. amin; a. luxmoore
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 | a low cost, rapid replica method has been developed to monitor the whole strain field near for example, welds, cracks and other sharp stress raisers. the technique uses transparent replicas that can be combined in several different ways to produce optical interference patterns representing the strain information. several examples of the use of the technique are described. (author) |
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| measurement of in-plane displacements and strains by moire and speckle methods |
76 |
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| Authors:
a. luxmoore
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| the use of the moire and speckle methods is discussed with regard to the evaluation of in-plane strain and strain gradients from the displacement patterns that the fringe patterns actually record. certain improvements in the techniques are suggested, particularly with regard to the measurement of strain gradients. some unusual applications of the techniques are suggested, and relative merits are considered. (author) |
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| measurement of in-plane displacements around crack tips by a laser speckle method |
DEC 74 |
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| Authors:
W. T. Evans; a. luxmoore
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| a laser speckle method has been used to investigate the in-plane displacements around crack tips in single edge crack tensile specimens made of araldite ct 200. good correlation was obtained between experimental results and the westergaard solution, using stress intensity parameters calculated by boundary collocation. (author) |
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| HOLOGRAPHIC DETECTION OF CRACKS IN CONCRETE |
OCT 1973 |
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| Authors:
a. luxmoore;
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| NON-DESTRUCTIVE TESTING OF CONCRETE, THOUGH DESIRABLE, PRESENTS PROBLEMS BECAUSE OF CONCRETE'S COARSE HETEROGENEOUS STRUCTURE AND THE PRESENCE OF VOIDS. THE AUTHOR DISCUSSES THE METHODS AVAILABLE FOR NDT OF CONCRETE AND POINTS OUT THEIR LIMITATONS. HE DESCRIBES THE APPLICATION OF HOLOGRAPHY TO THIS PROBLEM AND DISCUSSES THE RESULTS SO FAR ACHIEVED. HE CONCLUDES THAT THE METHOD IS USEFUL AND RECOMMENDS THE DEVELOPMENT OF THE TECHNIQUE AS AN ENGINEERING TOOL. REFERENCE IS ... |
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