Fixture for testing tensile mechanical properties of non-metallic material at 500K-4.2K

Abstract

The invention relates to a fixture for testing tensile mechanical properties of a non-metallic material at 500K-4.2K. The fixture is composed of an upper chuck and a lower chuck that have a same shape and structure and are positioned oppositely. A conical through-groove that runs through the front surface, the back surface and the bottom simultaneously and has a wide top and a narrow bottom is disposed at the center of the middle-lower part on the front surface of each chuck main body respectively. Tooth elements with opposite teeth are mounted on the left side and right side of the through-groove respectively. An upper threaded through-hole is disposed at the center of the main body's upper end face. A lower threaded rod of a bearing rod is in threaded connection with the threaded through-hole. The bearing rod is equipped with a horizontal through-hole running through the left end face and the right end face. A frame shaped reinforcing groove is fixed at the lower part of the main body as a sheath, the lower end face of the frame shaped reinforcing groove and the bottom surface of the main body are flush. A cuboid through-groove running through the front surface, the back surface and the bottom simultaneously is disposed at the center of the middle-lower part on the front surface of an adapter. The left end face and the right end face of the adapter are respectively provided with a horizontal through-hole. A pin rod penetrates the horizontal through-holes to make the upper cuboid of the bearing rod fixed in the through-groove of the adapter. The fixture has the advantages of convenient installation and accurate orientation, and under low temperature, a specimen and the fixture cannot slip.

Description

technical field [0001] The invention relates to a test fixture, in particular to a test fixture for testing the tensile mechanical properties of non-metallic material dumbbell-shaped, rectangular plates and other samples of different standards 500K-4.2K. Background technique [0002] At present, with the application of different types of non-metallic materials in low temperature and ultra-low temperature environments, especially some new composite materials, ceramic materials, quartz materials, semiconductor materials, etc. have potential application prospects in the fields of national defense, aerospace and civilian use. , it is imminent to study and obtain the mechanical properties of non-metallic materials at relevant service temperatures. At present, most of the mechanical tensile performance tests of non-metallic materials are concentrated at room temperature or high temperature, and the specific size standards of samples are based on domestic or international standards...

AI Technical Summary

Problems solved by technology

This directly leads to the incomparability of the mechanical tensile test data obtained by the samples at different temperatures, and it is not easy to obtain reliable comparison data

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