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The results of this preliminary
experiment are fairly good as the strain distribution is obtained along the
grating (except for a little part less than 1 mm at each grating sides).
Nevertheless, the applied loads were very high, inducing plastic deformations
of the epoxy sample. This explains some unwanted side effects as the offset in
the average strain. Further work will include improved finite elements
simulations and other measurements performed in quasi-static states for lower
load force values.
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