SU1582060A1 - Installation for deformation of specimens of materials - Google Patents

Abstract

The invention relates to a testing technique and can be used to deform material samples. The purpose of the invention is to expand the functionality of the installation. The installation comprises a frame 1 with parallel guides 2,3, a pair of coaxial grippers 4,5. Passive grippers 4 are fixed on sliders 7, which are mounted on guide 3. Active grips 5 are intended for weights 8. Intermediate grips 9 are connected by weights 10 with loads 10 located between samples 6. The loading mechanism is made in the form of electromagnets 12 fixed on screws 14. The latter are mounted on sliders 13 placed on guide 3. Samples 6 are fixed in grippers 4.5 and, depending on the loading pattern, electromagnets 12 are brought to loads 8 or 10. The interaction of electromagnets 12 with weights 8 and displacement electromagnets 12 by means of slide 13 produces bending stress to 6 samples. The displacement of the weights 10 from the equilibrium position by the electromagnets 12 creates on the samples 6 through the springs 11 a predetermined level of axial and bending loads. Turning off the electromagnets 12 simultaneously or with a time delay creates load oscillations on the samples. Thus, the samples are tested under the action of both bending and jointly bending and axial loads with independent excitation of oscillations on the samples, which allows expanding the functionality of the installation.

Description

The invention relates to testing equipment, in particular, to installations for the deformation of material samples.

The purpose of the invention is to expand the functionality by providing tests both under the action of a bending load, and under the combined action of bending and axial loads with independent excitation of oscillations on samples.

The drawing shows the scheme of the proposed installation.

The installation includes a frame 1, on which screw guides 2 and 3 are parallel to each other, pairs of coaxial grippers A and 5 for fastening samples 6 and a loading mechanism. Passive grippers A are fixed on sliders 7 mounted on guide 2, and active grippers 5 are designed to place loads 8 on them. Coaxially to pairs of grips Ai 5, intermediate grips 9 are installed to be placed on the working part of the samples 6. Between intermediate grips 9 are located additional weights 10, associated with the latter by means of elastic elements, for example springs 11. The loading mechanism + load of samples 6 is made in the form of electromagnets 12 by the number of active grips 5 intended for alternating mutual Connections with weights 8 or 10 placed on sliders 13. The latter are mounted on guide 3. Screws 13 are mounted on sliders 13.

Q

g

Q

0

A, whose axis is perpendicular to the axis of the guide 3 and at the end of which electromagnets 12 are fixed.

The installation works as follows.

Samples 6 are fixed with one end E of the passive gripper-x A, at the other ends with the help of active claws 5, weights 8 are placed. 3 according to the loading scheme, intermediate clamps 9 are placed between grips A and 5 and the latter are joined with loads 10 by means of springs 11 placed between samples 6. Then, by rotating the screws 1A and moving the sliders 1 along the guide 3, electromagnets 12 are applied to the loads 8 or 10, depending on the loading pattern. After this, the magnets 12 are switched on the elea- ny and by rotating the screws 1A the weights 10 are placed from the equilibrium position to the position in which the springs 11 create a predetermined level of axial and bending loads on the samples 6. If the electromagnets 12 interact with the weights 8 of the active grips 5, then the bias of the electromagnets 12 is produced t with the help of the corresponding sliders 13 along the guide 3 to the position at which a given bending load is created on the samples 6. During the tests, electromagnets 12 are disconnected simultaneously or with a predetermined delay in time, while loads 8 and 10 create load oscillations on specimens b, loads 10 jointly axial and bending, and loads 8 oscillate only bending loads samples 6. In the process of oscillation, efforts are recorded on samples 6 and their deformations with the help of recording devices (not shown in the drawing). The tests are carried out until the destruction of samples 6 or to the level of irreversible deformations that exceed the permissible deformations of the actual structure.

Thus, the connection of samples to each other in the Testing Process through intermediate grips using elastic elements and weights and loading the samples using electromagnets expands the functionality of the installation, since it allows testing the samples both under the action of bending and joint action of the bending. and axial loads with independent excitation of oscillations on samples.

Claims (1)

The invention of the installation for deformation of samples 15 1582060 five five materials containing a frame, passive grippers for samples fixed on the frame, weights connected to active grippers, intermediate grippers for connecting the samples between themselves and a loading mechanism, characterized in that, in order to extend the functionality by providing tests like under bending load, and when the joint action of the bending and axial loads with independent excitation of oscillations on the samples, the installation is equipped with additional weights placed between intermediate for by hooks, weights are connected to intermediate grips by means of elastic elements, and the loading mechanism is made in the form of electromagnets according to the number of active grips installed with a possibility of movement in the direction perpendicular to the grips and intended for alternate interaction with the main and additional weights.