SU1536253A1 - Installation for physicomechanical tests of specimens of materials - Google Patents

Abstract

This invention relates to a testing technique. The purpose of the invention is to expand the functionality. The installation comprises a housing 1 with a spiral guide 2 of two parallel parts with a gap 3 between them. Carriages 4 are mounted on guide 2, which can move along guide 2 by means of rollers 5 rigidly fixed on them. On carriages 4, grips 6 of sample 7 are mounted for fixed movement. Mechanism of movement of carriages 4 is made in the form of rollers 8 interacting with a screw 9, the axial movement of which is carried out by the actuator 11 of rotation of the nut 10. The sample 7 is fixed in the grippers 6 and the carriages 4 move along the guide 2 through the rollers 9 by rotating the screw 9. During the passage of the curvilinear section Sample 7 is subjected to the joint action of bending and axial loads. With the passage of the grippers 6 along the radius of curvature, greater than the radius of curvature of the section of the guide 2, the axial load will be tensile, while passing along a smaller radius-compressive. When combining the axis of the grippers 6 and the axis of the gap 3 of the guide 2, the sample 7 is loaded only with a bending load. The ratio of deformations is controlled by the position of the claws 6 relative to the axis of the gap 3 of the guide 2. Thus, the specimen is tested both under the action of bending and under the combined action of bending and axial loads. 1 il.

Description

The invention relates to a test apparatus, in particular, to installations for physico-mechanical testing of material samples.

The purpose of the invention is to enhance the functionality by providing layer-by-layer deformation of the sample both by bending and by the combined action of bending and axial load with an adjustable ratio between deformations.

The drawing shows the scheme of the proposed installation.

The apparatus comprises a housing 1, in which a spiral guide 2s is installed, made of two parts, mounted parallel to each other with a gap 3 between them. The end section of the guide 2 is made out with a given radius of curvature. Carriages 4 are placed along the length of the guide rail 2. At least each carriage 4 is rigidly fixed to a pair of rolling bodies made in the form of rollers 5 and placed on opposite surfaces of the carriage 4. Rollers 5 are installed in groove 3 with the possibility of movement along guide 2 The carriages 4 are fitted with corresponding grippers 6 for fastening the sample 7, which have the possibility of fixed movement perpendicular to the guide 2. On the straight line of the latter, a device is installed for moving the sample 7 along the direction track 2 configured in the form of successively laid down in the guideway 2 the rolling bodies. The latter are made in the form of rollers 8, interacting on one side with the extreme carriage 4, and on the other with a screw 9. On the latter there is a nut 10, kinematically connected with the rotational drive 11.

The installation works as follows.

The curvilinear section of guide 2 is placed in a container 12 filled with a working liquid or a surfactant. Sample 7 is fixed in grips 6, which are pre-installed so that, when moving the carriage 4, the grippers 6 fixed on them are positioned depending on the loading conditions on the outer or inner side of the curvilinear section of the guide 2. Then 10. At the same time, the screw 9 moves along the guide 2 and accordingly rotates the rollers 8. The latter move in the guide 2 and, interacting with the extreme of the carriages 4, move the latter along the groove 3 of the guide 2 due to In the latter, the corresponding rollers 5 of the carriage 4. When the rollers 5 of the carriage 4 pass through a curved section of the guide 2, the rollers 4 rotate the carriage associated with it relative to the rest of the carriages 5, as a result of which in the sample 7 between the carriage 5 A bending and axial load is created on the straight portion of the guide 2, and a subsequent carriage 2. In this case, if the grippers 6 move along a large radius relative to the curvilinear portion of the guide 2, then the sample 7 is deformed by a tensile load, and if the grips moves along a smaller radius, then the sample 7 is deformed by a compressive load. To load the sample 7, bending the axis of the grips 6 is aligned with the axis of the gap 3 of the guide 2. The ratio between the deformations is controlled by the position of the grippers 6 relative to the axis of the gap 3. Subsequently, as the sample moves, the sample 7 is immersed deformation, the nature of the last destruction of the sample 7 and the distribution of the area of high moisture content over the volume of the latter.

Claims (1)

Thus, the placement of the grips on carriages mounted for movement along the guide provides stratified deformation of the sample both by bending and by the combined effect of bending and axial load with an adjustable ratio between the strains, which expands the functionality of the installation. Invention Formula Installation for physico-mechanical testing of samples of materials containing - 0 five spiral guide for accommodating the test specimen and fitting for moving the specimen along the guide, made in the form of successively installed rolling bodies, which, in order to enhance the functionality by providing a layer-by-layer deformation of the specimen by bending as well as joint the action of bending and axial load with an adjustable ratio between the deformations, the guide is made of two parts installed parallel to each other with a gap between them, and Single provided with carriages mounted on the track with possibly Stu movement means rigidly fixed to the carriages additional rolling bodies, and clamps the sample mounted on the respective carriages, with the fixed movement perpendicular to the guide, and the main body cooperate with rolling carriage at.