Small-size self-centering one-way loading biaxial tension-compression test device

Abstract

The invention discloses a small-size self-centering one-way loading biaxial tension-compression test device. The device is characterized by comprising a loading transmission device and a combined type framework, wherein the combined framework is composed of a main framework 1 and a suspension framework 2, the loading transmission device comprises transverse loading shafts (12 and 13), vertical loading shafts (10 and 15), inclined rigid rods (9, 11, 14 and 16), transverse sliding rods (3 and 7), sliding connectors (4 and 8), stepping motors (5 and 6), fixing and sliding dual-use hinged supports (23 and 24) and fixing hinged supports (25 and 26). According to the small-size self-centering one-way loading biaxial tension-compression test device, the function of biaxial tension and compression can be achieved by means of one-way loading; and simultaneously, problems that the fluctuation process that the center of a test piece is deviated and goes back to the center of the loading device happens in the test process always and the test piece is difficult to clamp and adjust are solved.

Description

technical field [0001] The invention relates to the field of biaxial test loading equipment, in particular to a small self-centering unidirectional loading biaxial tension and compression test device. Background technique [0002] For anisotropic materials, the general uniaxial tensile test can no longer truly reflect the physical and mechanical properties of the material. It is necessary to study the mechanical behavior of the material when it is subjected to a uniform load field in two directions perpendicular to each other. The obtained double The axial physical properties are of great significance for the processing and application of materials and the development of new materials. [0003] At present, from the perspective of the realization of the bidirectional load field, there are mainly two methods. [0004] One is to create a bidirectional stress field inside the material through the combined tension-torsion loading of the thin-walled cylinder. Sittner et al. (Met...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a small self-centering unidirectional loading biaxial tension and compression test device to solve the center deviation of the test piece, the fluctuation process of returning to the center of the loading device and the fluctuation of the test piece during the test process. Difficulty in clamping adjustment

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