Multipoint laser detection device for shearing strain of material

Abstract

The invention discloses a multipoint laser detection device for shearing strain of a material. The multipoint laser detection device comprises a test piece support assembly, a torque applying assembly and a laser detection assembly, wherein the support assembly comprises a test piece support seat for fixedly supporting the test piece and enabling the test piece to be horizontally arranged; the laser detection assembly comprises at least two lasers which are longitudinally distributed along the test piece; the lasers are respectively and fixedly arranged on laser clamps which are in one-to-onecorrespondence with the lasers; and staff gauges for reading laser line corner are correspondingly arranged on the laser lines of the lasers. According to the multipoint laser detection device disclosed by the invention, the relationship between the shearing strain and the torque as well as the relationship between the shearing strain and the distance between a stressed point and a fixed point can be obtained and the material shearing Hooke's law is verified. Therefore, the multipoint laser detection device can be used for simultaneously testing a plurality of sections of the test piece; the test process is directly-viewed and open, thus the test process and the change of parameters can be clearly seen by people on the scene and the multipoint laser detection device is suitable for classroom teaching and testing. The invention has the advantages of simple structure, easiness in disassembly, assembly and operation and lower test cost compared with that of equipment in the prior art.

Description

technical field [0001] The invention relates to teaching experiment equipment, in particular to a laser detection device for material shear strain. Background technique [0002] In the torsion teaching of material mechanics, in the process of shear strain test, it is generally used to draw circles equidistantly on the outer surface of a rubber cylinder, and draw straight lines evenly distributed on the circumference in the longitudinal direction. Change. Thus, entering into the cross-section hypothesis of mechanics, under the action of a pure force couple, the cross-section of the cylinder rotates relative to the cross-section, and the rotation angle is related to the magnitude of the moment and the distance between the force point and the force point, so as to verify the shear Chehuk's law. In the prior art, due to the limitation of the size of the test piece, as well as the constraints of the experimental instruments and experimental methods, the general experimental res...

AI Technical Summary

Problems solved by technology

However, if one section is compared with one section instead of two sections or three sections are compared with the same section, the test results cannot be fully obtained; and the reading window is small, and only one person can observe the reading changes, such as dial gauge, millivolt meter, and monocular telescope. Etc., affecting test efficiency and reducing teaching effect

Images