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Experimental Mechanics @
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Recent
Research: Crack analysis using TSA |
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Staring
array infra-red cameras with high frame acquisition rates have allowed
continuous monitoring of the strains around fatigue cracks growing through
laboratory coupons and in welded plates with residual strain fields. The image data such as that shown above can
be readily quantified in terms of crack location and stress intensity
factor. In-house software is used to generate quantitative data
rapidly from images generated by commercially available instrumentation. For more details see: DIAZ,
F.A., PATTERSON, E.A., TOMLINSON, R.A., YATES, J.R., 2004, ‘Measuring
stress intensity factors during fatigue crack growth using thermoelasticity’,
Fat & Fract. Engng.
Mater. & Structures 27(7):571-584. |
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Click for
a video showing the crack tip strain field around a growing crack as a contour map, similar to the one above, or as a three-dimensional plot. |
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