Apparatus for the uniaxial investigation of microtensile samples

摘要

A load-bearing frame 1 is disposed between the punches of a testing machine for the absorption of its forces, the forces being introduced into the sample via said frame, and having a force-measuring box 12 between the sample and load-bearing frame for detecting the testing force. The load bearing frame 1, which is clampable between the tensioning rods 4,5 of a tension testing machine and is deformable to a predetermined extent by the forces of the machine, comprises two frame portions (2,3,fig.2) which are screwed together. The front frame portion (2) and rear frame portion (3), each in the form of two springs, which are connected in parallel, similar to a multiple "5" formed from a plurality of cradle-like elements (6), are connected one behind the other, with unilateral clamping and intermediate slots (7). A portion of the sample is mechanically clamped in position, slot 10, on the lower portion of the load-bearing frame and the other portion is clamped on a sample clamping member 22, which is configured as a deformable element of force-measuring box 12, the additional elements 25 of the box being rigidly mounted on the upper portion of the load-bearing frame, and the box being likewise deformable to a predetermined extent. The force-measuring box 12 is likewise bipartite, half of which being associated with each frame portion (2,3), the sample being hydraulically clamped (27,28) in position with its one end on one half (13) of the force-measuring box, and the deformation of the force-measuring box 12 is greater, by a multiple, than that of the load-bearing frame.