Accelerated-storage test method for on-missile sealing pieces

Abstract

The invention discloses an accelerated-storage test method for on-missile sealing pieces. The accelerated-storage test method includes the steps of 1), making an accelerated-storage test plan for sealing piece materials, implementing the accelerated-storage test for the sealing piece materials, and evaluating activation energy of the sealing piece materials; 2), optimizing the accelerated-storage test plane for sealing piece products, implementing the accelerated-storage test for the sealing piece products, and evaluating storage life of the sealing piece products. In the method, the test is divided into to steps, namely the accelerated-storage test of the materials and the accelerated-storage test of the products, so that shortcomings of high risk and inaccurate evaluation of accelerated-storage test of the products can be directly reduced. Data statistics of the accelerated-storage tests for the on-missile sealing pieces are performed, matching of the performance degradation process of the sealing pieces is performed by the adoption of multiple models, and the models with the highest matching accuracy are selected to be calculated, so that the material activation energy obtained can be more conforms to actual products.

Description

technical field [0001] The invention relates to the technical field of accelerated storage. More specifically, it relates to an accelerated storage test method for a seal on a projectile. Background technique [0002] Accelerated storage test technology is the key technology to improve the storage life evaluation of reliable long-life products. In the engineering development stage, the accelerated storage test technology can be used to predict the storage life of the product, to expose weak links, to improve the design, and to improve the storage reliability of the product; Rapid evaluation of life expectancy provides a basis for formulating life extension plans and carrying out life extension work. Many missile-mounted equipment need to use sealing products, and the seals restrict the storage life of missiles. How to carry out accelerated storage tests of missile-mounted seals and evaluate their storage life based on tests is an urgent task in the field of missile storage...

AI Technical Summary

Problems solved by technology

In the test procedure, material samples are used for the test, and the detection interval under each stress is not specified. For the upper seal, the material, shape, size, tooling, etc. are different, and only the sample is used for the test, which cannot be well simulated. The actual working conditions of seal products, therefore, need a "two-step" test method that first conducts a material test to estimate the activation energy of the material, and then conducts a product test to evaluate the product life

In the statistical method, it is recommended to use the exponential model to fit the performance degradation process, but the correlation coefficient test fails when the data obtained in the actual test uses the exponential model

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