SU1495679A1 - Method of estimation of elastomer fatigue durability - Google Patents

Abstract

The invention relates to the testing of the strength properties of elastic materials and improves the accuracy by providing an operating temperature gradient over the deformable zone of the sample. The disk indenter is pressed into the sample roller and control the load characteristic. The sample is rolled around the indenter using a rotating drum to a set self-heating temperature. The indenter is retracted and pressed into the sample before failure. The indentation work and the number of cycles before failure are recorded. 1 il.

Description

The invention relates to the testing of the strength properties of elastic materials and the prediction of their endurance.

The purpose of the invention is to improve the accuracy by providing an operational temperature gradient over the deformable zone of the sample.

The drawing shows a diagram of the device for implementing the proposed method.

The sample roller 1 is mounted on the rotation unit 2 with the ability to move by means of screw pair 3 to the drum 4. On the opposite side from the drum 4, the disk indenter 5 contacts the sample roller and rotation unit 6 mounted on the carriage

7 with the possibility of moving from the load

8to the platform 9 with a movement sensor 10 and a force 11 sensor of the indenter,

The method is carried out as follows.

The test sample roll 1 is mounted on the rotation assembly 2 and the disk indenter 5 is pressed into the sample. Control the load characteristic (indentation depth from the applied load) and calculate the indentation work of the indenter. The screw pair 3, sample 1, is led to the drum 4 and is rotated together with the indenter 5.

For short stops, the sample temperature is measured, for example, with a needle thermocouple. After the set temperature, the disk indenter 5 is taken out of contact with the sample and re-pressed, while removing the load characteristic of the rotating sample according to which the value of the pressing force corresponding to the work is corrected.

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indentation. The drum rotational speed is adjusted to maintain the temperature of the sample. Sample 1 is loaded with an indenter 5 until a fatigue crack forms on the sample surface and the number of cycles is monitored.

Claims (1)

Invention Formula The method for evaluating the fatigue endurance of elastomers, which consists in heating an elastomer sample to a temperature corresponding to its temperature during heating during operation, loads the sample with a cyclic crushing load using Indenter and ... indentation of the indenter at this temperature determine the wear resistance of TfiM, which, in order to increase accuracy by providing an operational temperature gradient over the deformable zone of the sample, a cylindrical sample is used. the disk is rolled over the cylindrical surface of the sample, after reaching the established sample temperature, the disk is retracted, and the loading is performed by rotating the sample with a disk with the force of pressing or equal to the force indentation when heated.