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An accurate measurement of the photoelastic signal of a loaded sample can provide much more than what was presented before. Virtually (non-uniqueness of the solution), by inverting the mechanical problem, knowing the material behavior and geometry, is it possible to get the full stress field. For complex materials and geometries, this can be extremely complicated. But in the case of circular discs, assuming you are in the Hertz contact regime things are easier and you can get the external forces applied to the sample. This has been implemented in granular matter by [Majmudar and Behringer](https://www.nature.com/articles/nature03805) for example. More details about this method are given [here](/inverse-analysis).
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[<go back to home](/home) |
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[<go back to home](/) |