Rubber-storage-life predicting model based on test equipment for room-temperature and high-pressure compression stress relaxation of rubber

A life prediction model, stress relaxation technology, applied in the direction of testing material strength by applying stable tension/compression

Inactive Publication Date: 2012-07-18
BEIHANG UNIV
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Problems solved by technology

[0004] In order to solve the problems existing in the rubber room temperature and high temperature compression stress relaxation test in the prior art, the present invention provides a device and method for the

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  • Rubber-storage-life predicting model based on test equipment for room-temperature and high-pressure compression stress relaxation of rubber
  • Rubber-storage-life predicting model based on test equipment for room-temperature and high-pressure compression stress relaxation of rubber
  • Rubber-storage-life predicting model based on test equipment for room-temperature and high-pressure compression stress relaxation of rubber

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Embodiment Construction

[0081] The equipment for the compression stress relaxation test of rubber at room temperature and high temperature is as follows, mainly including: lower plate, limiter, upper plate, pressure sensor, sensor lead wire, indenter and flange. The upper plate is placed above the lower plate, the lower plate is vertically corresponding to the central position of the upper plate, a central through hole is opened in the central position of the upper plate, and a through hole is respectively opened in a left-right symmetrical position of the central through hole, A counterbore is respectively opened on the lower plate at the positions vertically corresponding to the left and right through holes of the upper plate. The left and right limiters fix the lower plate and the upper plate together through the left and right through holes of the upper plate and the left and right counterbore holes of the lower plate respectively. The pressure sensor is located between the lower plate and the up...

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Abstract

The utility model provides a life predicting model based on test equipment for room-temperature and high-pressure compression stress relaxation of rubber. The life predicting model comprises the following steps of: firstly, drawing stress relaxation change data acquired by the device into a diagram to obtain the relation between the stress relaxation condition and the ageing time and the relation between the speed constant and the ageing temperature; secondly, obtaining all coefficients in the equation by utilizing an approximation method, a linear regression method and MATLAB programming software, and judging the linear regression effect according to the related method; and finally, determining a rubber life predicting value after giving critical values of temperature and stress relaxation. The life predicting model has the advantages that the device for testing the compression stress relaxation of high-temperature rubber can be utilized for monitoring the change of the compression stress, so as to establish the life predicting model, and the accuracy, the repeatability and the reproducibility of a life predicting result are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of life prediction of rubber materials, and in particular relates to a new device which can be used for rubber normal and high temperature compression stress relaxation tests and a rubber storage life prediction model. Background technique [0002] In the prior art, compression set and compression stress relaxation are usually used as characteristic indicators to predict the life of rubber materials. The existing technology measures the change of the compressive stress of rubber under normal temperature and high temperature constant deformation, that is, the rubber sample is compressed to produce a constant deformation, and the compressive stress relaxation of the sample is measured after aging at a certain temperature for different times, which provides a basis for the life evaluation of rubber materials. technical foundation. The compression stress relaxation test equipment recorded in the national standa...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/18
Inventor 赵丽张卫方符丽君丁美丽武玉芬杨明远王爽陈宇
Owner BEIHANG UNIV
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