SU1439451A1 - Method of determining characteristics of mechanical properties of material in article - Google Patents

Abstract

The invention relates to a test apparatus and {may be used for technological tests of products. The aim of the invention is to make it possible to determine the properties of a material on a fabric during their operation without destroying them. An annular / o groove and two deaf grooves communicating with it, forming a jumper, are made in the test area of the product surface. Install the grippers 5 so that their ledges interact with the side walls of the grooves. The force on the claws 5 is transmitted from the loading device 6 through the rod 7 and the rods 8 pivotally connected to it. In the process of loading, the dependence of the deformation determined by the strain gauge mounted on the bridge 4 is recorded on the forces. 2 Il.

Description

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The invention relates to a testing technique and can be used for technological testing of products,

The purpose of the invention is to provide the possibility of determining the properties of a material on products during operation without destroying them.

Figure 1 shows a section of the product for preparation for testing, top view; Fig. 2 is a diagram of a device for implementing the method, front door.

The method is carried out as follows.

In the studied area I of the surface of the product, an annular groove 2 n is drawn out, which are connected with it by two deaf grooves 3, directed towards each other along the diameter of the groove 2 and forming jumper 4 in its geometric center. Then, the grippers 5 are mounted so that they interact with the side walls of the grooves 3. The force on the grippers 5 is transmitted from the loading device 6 through the rod 7 and the rods 8 are pivotally connected to it. sensor 9 mounted on the rod, and deformation using a strain gauge mounted on jumper 4.

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Example. Pa plot surface

nuclear reactor end mill

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a colpevum groove with a diameter of 50 mm, 1 bar 5 with a depth of 5 mm and two deaf grooves of the same section are made. Jumper between groove ami 3 mm. An increasing force is applied to the walls of the grooves, the magnitude of which and the deformation of the web are continuously recorded. The limit of proportionality is determined from the dependence of the deformation on the force. The yield strength G is the modulus of elasticity of the metal of the reactor vessel without destroying it and cutting samples from it.

Claims (1)

Invention Formula The method of determining the characteristics of the mechanical properties of the material in the product, including loading the product with a tensile force, recording its magnitude and the deformations corresponding to this force, which determine the characteristics of the mechanical properties that are different in that in order to determine the properties of the material on the product during operation, without destroying them, an annular groove is made on the surface of the product and the bottom of the deaf groove communicated with it is directed towards each other along the diameter anavki and forming a bridge in its geometric center and the tensile force applied to the walls of the grooves.