Self-adaptive type extensometer with multiple deformation modes

Abstract

The invention discloses a self-adaptive type extensometer with multiple deformation modes. The self-adaptive type extensometer comprises two positioning bolts, two both-way connecting nuts, two universal hinge assemblies, two connecting bolts, two connecting sleeves, a first retractable steel pipe, a second retractable steel pipe and an extensometer. With adoption of reasonably designed positioning bolts, one-dimensional samples with smaller cross sections can be fixed in a bound manner; samples with larger cross sections are fixed in a pre-buried manner, and the application range of the self-adaptive type extensometer with multiple deformation modes is expanded; the universal hinge assemblies have good rotating performance in all directions, so that various deforming conditions of tested samples can be adapted to, axes of the first retractable steel pipe and the second retractable steel pipe are located on the same straight line without dislocation and the first retractable steel pipe and the second retractable steel pipe can freely stretch out and draw back in the axial direction when two points are in complicated composite motion such as rotation, torsion, translation, dislocation and the like simultaneously, and the extensometer can still accurately measure relative translational movement of the two points.

Description

technical field

[0001] The invention belongs to the technical field of equipment and devices for measuring relative displacement, and in particular relates to a multi-deformation mode self-adaptive extensometer for testing the deformation of a sample under axial load. Background technique

[0002] The mechanical performance test of material tension and compression usually requires the use of an extensometer to measure the deformation of the sample under axial load in real time. Extensometers can be divided into contact and non-contact types. Contact extensometers can be divided into two types: mechanical and electronic. In the normal temperature mechanical performance test, mechanical extensometers have been eliminated. At present, clip-type electronic extensometers are commonly used. Non-contact extensometers use digital image technology to measure the deformation of specimens, and are generally called optical extensometers. Optical extensometers have the advantages of no...

Images