Device for testing specimens (11) in the form of small plates, in which the specimen is grasped between two pairs of jaws (12, 13) which can be brought together. The jaws (12, 13) are mounted on platforms (1, 4) without hyperstatic effects, which reduces the risks of introducing parasitic forces. The specimen may be cut so that its medium part is subjected to a shear. The jaws then have lengths sufficient to cover the main faces of the specimen (11) almost as far as the cuts. The shear field is maximal and approximately uniform in the median surface situated between the cuts. This invention is usable for characterising the interlaminar shear of plates made of composite materials, including curved specimens. …IMAGE…
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