TEST APPARATUS AND TESTING DEVICE FOR INCREASED ACCURACY PRECISION

摘要

The invention proposes a mechanical test specimen (1), said test specimen comprising a body having a main dimension extending along an axis, and comprising a so-called useful zone (10) adapted to undergo a deformation in response to a mechanical stress. of the test piece along the axis, characterized in that it comprises an internal channel (12) of revolution centered on the axis of the test piece, comprising a portion (13) extending inside the zone useful, said portion being adapted to receive an end of a bundle of optical fibers and a reflecting target opposite thereof in the direction of the axis. The invention also proposes a test device comprising such a test piece.