RU2499245C1 - Device to test samples of materials with multiple excitation of damped oscillations of load - Google Patents

Abstract

FIELD: testing equipment.

SUBSTANCE: device comprises a base, two cross beams installed on it, fixators of cross beams on the base, a facility for excitation of damped oscillations, comprising a weight, an elastic element connected with the weight, a mechanism of deformation of the elastic element made as capable of interaction with the weight, an accessory for load discharge, two sample grips, one of which is connected with the facility for excitation of the damped oscillations. The device has an additional facility for excitation of damped oscillations connected with the second grip, facilities for excitation of the damped oscillations are arranged between cross beams, grips are fixed on the appropriate weights. Elastic elements are installed as capable of interaction with the appropriate cross beams. The mechanism for elastic element deformation is made in the form of a continuous tape installed on the two spaced blocks along direction of weight motion, and a drive of block rotation. The accessory for load discharge is made in the form of a fixator for connection of the weight with the tape installed on the appropriate weight.

EFFECT: increased volume of produced information by means of loading with application of repeated damped oscillations to different ends of a sample.

4 cl, 1 dwg

Description

The invention relates to testing equipment, to strength tests.

A device for testing samples of materials upon repeated excitation of damped oscillations (RF patent No. 1176195, class G01M 7/00, 1985), containing a base, two traverses mounted on it, traverse clamps on the base, means for exciting damped oscillations, including a load, an elastic element connected to the load, a mechanism for deforming the elastic element configured to interact with the load, a load shedding device, two sample grips, one of which is connected to a damping excitation means constituent oscillations.

The disadvantage of this device is that it is impossible to load when applying repeated damped pulses to different ends of the sample.

A device for testing samples of materials with repeated excitation of damped oscillations (RF patent No. 1435978, class G01N 3/34, G01M 7/00, 1988), adopted as a prototype. The device comprises a base, two traverses mounted on it, traverse clamps on the base, means for exciting damped oscillations, including a load, an elastic element connected to the load, an elastic element deformation mechanism configured to interact with the load, a load shedding device, two grippers sample, one of which is connected to a means for exciting damped oscillations.

The disadvantage of the device also lies in the fact that it is not feasible loading when applying repeated damped pulses to different ends of the sample.

The technical result of the invention is to increase the amount of information obtained by loading when applying repeated decaying pulses to different ends of the sample.

The technical result is achieved in that a device for testing samples of materials upon repeated excitation of damped load oscillations, comprising a base, two traverses mounted on it, traverse clamps on the base, means for exciting damped oscillations, including a load, an elastic element connected to the load, a deformation mechanism an elastic element configured to interact with the load, a device for load shedding, two sample grips, one of which is connected to the means for excitation to attenuate damped oscillations, according to the invention, it has an additional means for exciting damped oscillations connected to the second grip, means for exciting damped vibrations are located between the traverses, the grippers are fixed to the corresponding weights, and the elastic elements are installed to interact with the corresponding traverses, while the mechanism for deformation of the elastic element is made in the form of an endless tape mounted on two spaced blocks along the direction of movement of goods , and the drive rotation of the blocks, and the device for load shedding is made in the form of a latch for connecting the load with the tape mounted on the corresponding load.

The technical result is achieved in that the elastic elements have different stiffness.

The technical result is achieved in that the goods have different weights.

The technical result is achieved by the fact that the traverses have clamps for connection with the tape.

Figure 1 presents a diagram of a device.

A device for testing samples of materials upon repeated excitation of damped load oscillations comprises a base 1, two traverses 2, 3 mounted on it, clamps 4, 5 traverse on the base, means for exciting damped vibrations, including a load 6, an elastic element 7 connected to the load, an elastic element deformation mechanism 8 configured to interact with a load 6, a load shedding device 9, two grippers 10, 11 of a sample 12, one of which is connected to a means 6 for exciting damped vibrations d.

The device has an additional means 13 for exciting damped oscillations, connected to the second grip 11 and including a load 13 with an elastic element 14. Means 6, 13 for exciting damped vibrations are located between the traverses 2, 3. The grippers 10, 11 are fixed to the corresponding loads 6, 13 The elastic elements 7 and 14 are installed with the possibility of interaction with the respective traverses 2 and 3. The mechanism for deformation of the elastic element is made in the form of an endless tape 8 mounted on two spaced blocks 15, 16 along the direction Vision goods 6, 13, and actuator 17 blocks rotation. The device 9 for load shedding is made in the form of a latch for connecting the load with a tape mounted on the corresponding load 6, 13. The elastic elements 7, 14 have different stiffness. Loads 6, 13 have different weights. Traverses 2, 3 have clamps 18, 19 for connecting with tape 8.

The device operates as follows.

The drive 17 is turned on, the blocks 15, 16 are rotated and the flexible tape is moved 8. The lock 9 is turned on and the load 6 is connected to the tape 8. The tape 8 moves the loads 6, 13 with the grippers 10, 11, sample 12 and elastic elements along the base 1 in the direction of the crosshead 3. Upon contact of the elastic element 14 with the traverse 3, the sample 12 is loaded with the initial axial load. After reaching the specified load, the load lock 9 is turned off, the goods are moved back under the elastic energy of the element 14 until the element 7 collides with the traverse 2. An axial impact loading of the sample 12 occurs with a force impulse applied to the gripper 10. The direction of movement of the sample is reversed and the next the shock pulse is supplied from the capture 11 after the collision of the elastic element 14 with the traverse 3. Multiple excitation of damped oscillations occurs with a change in the direction of the next shock and pulse. The parameters of the pulses are controlled by the selection of the stiffness of the elastic elements (the stiffer element creates shorter pulses in time), the selection of the weight of the goods (the load of a larger weight creates a larger momentum), by moving the traverses relative to each other with short-term connections of the traverse with the tape 8 clips 18 or 19 (the smaller the distance between the traverses, the greater the pulse frequency).

The device significantly increases the amount of information obtained by providing tests with the application of repeated damped pulses to different ends of the sample.

Claims (4)

1. A device for testing samples of materials upon repeated excitation of damped load oscillations, containing a base, two traverses mounted on it, traverse clamps on the base, means for exciting damped vibrations, including a load, an elastic element connected to the load, an elastic element deformation mechanism made with the possibility of interacting with the load, a device for load shedding, two sample grips, one of which is connected to a means for exciting damped oscillations, distinguishing I mean that it has an additional means for exciting damped oscillations connected to the second grip, means for exciting damped vibrations are located between the traverses, the grippers are fixed to the corresponding loads, and the elastic elements are installed with the possibility of interaction with the corresponding traverses, while the mechanism for deforming the elastic the element is made in the form of an endless tape mounted on two spaced blocks along the direction of movement of goods, and the drive rotation of the blocks, and adapted The load shedding is made in the form of a clamp for connecting the load to the tape mounted on the corresponding load. 2. Installation according to claim 1, characterized in that the elastic elements have different stiffness. 3. Installation according to claim 1, characterized in that the goods have different weights. 4. Installation according to claim 1, characterized in that the traverses have clamps for connecting to the tape.