Clamped straight rod small sample creep testing method and apparatus thereof

A creep test and small sample technology, which is applied to the device for the creep test of the small sample of the clamped straight rod, and the test field that uses the small sample of the clamped straight rod to test the creep performance of the material, which can solve the limitation of promotion Application, complex manufacturing process, difficult analysis of test data, etc.
CN103487336AInactive Publication Date: 2014-01-01EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2014-01-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a clamped straight rod small sample creep testing method and an apparatus thereof. The testing apparatus comprises a heating module, a loading module, a clamping module, a displacement measuring module and an external support; and the testing method comprises the following steps: designing and making a clamped straight rod small sample, carrying out multiple creep tests of a material at a same temperature under different loads, establishing a steady state creep rate curve, obtaining a Kachanov-Rabotnov creep damage constitutive equation, and adopting a finite element to carry out parameter optimization. The small sample creep testing method provided by the invention solves the problems of difficult data parse and many testing influence factors of present small sample technologies, has the advantages of simple operation, high testing precision and low cost, and provides basic data for the exploitation of a new material, the high-temperature integrity evaluation of a service member and the performance evaluation of an irradiated material.
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Description

technical field

[0001] The invention relates to a creep test method for a small straight bar sample, in particular to a test method for testing the creep performance of a material by using a small straight bar sample fixed. At the same time, it also relates to a device for performing a creep test of a small sample of a fixed straight bar. Background technique

[0002] With the rapid expansion of high-energy industries such as thermal power, nuclear power, and petrochemicals, in order to improve the energy efficiency of equipment and systems, process machinery and equipment such as production, preparation, and storage are developing in the direction of high parameters such as high temperature and high pressure. Therefore, the structural integrity of mechanical equipment that has served in high-temperature and high-pressure environments for a long time plays an extremely important role.

[0003] At present, the common method to predict the safety and remaining life of high-te...

Claims

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