Parabolic equal-strength beam for stress detection and calibration

Abstract

The invention discloses a parabolic equal-strength beam for stress detection and calibration, which includes a detection beam, a stress meter, a base, a limit block, a loading device, and fastening screws. The base is a rectangular plate. The limit block for fixing the detection beam is installed at one end of the base, and the loading device for applying a load to the detection beam is installedat the other end. The detection beam is of a plate structure, and the cross section shape of the detection beam is parabolic. One end of the detection beam is fixedly connected between the base and the limit block through the fastening screws, and the other end of the detection beam is inserted into the loading device. The stress meter used for measuring the stress on the detection beam is installed on the loading device. By designing the configuration of the detection beam, the problem that the traditional equal-strength beam cannot measure stress in the plane is overcome. Through cooperationof the detection beam, the base, the limit block and the loading device, a stress gradient from tensile stress to compressive stress is presented on the cross section of the equal-strength beam, andthe parabolic equal-strength beam makes up for the defect that the traditional equal-strength beam cannot detect stress gradient.

Description

technical field [0001] The invention relates to a parabolic equal-strength beam used for stress detection and calibration, especially suitable for stress detection and calibration instruments of aerospace weapons and equipment, and belongs to the technical field of pipeline detection. Background technique [0002] Equal-strength beam is a structure in which the maximum normal stress on each cross-section of the beam is equal. It is often used for calibration of stress detection. The relationship between the determined loading stress and the surface stress of the beam can be obtained through material mechanics calculations. The traditional equal-strength beam generally adopts a cantilever beam structure, which has a large volume, and when the equal-strength beam is loaded, the surface will bend accordingly, which is difficult to meet the needs of measuring stress in the plane. On the other hand, the traditional equal-strength beam The end is a small plane and needs to be load...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a parabolic equal-strength beam for stress detection and calibration, and realizes stress loading in a plane by designing the configuration of the detection beam. It overcomes the problem that the traditional equal-strength beam cannot measure the stress in the plane; through the cooperation of the detection beam, base, limit block and loading device, it realizes the stress from tensile stress to compressive stress on the cross-section of the equal-strength beam Gradient, which makes up for the defect that the traditional equal strength beam cannot be used for stress gradient detection

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