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Material creep fatigue life evaluation method and system

A fatigue life and creep technology, applied in analyzing materials, testing material strength by applying repetitive force/pulse force, testing material strength by applying stable tension/pressure, etc. It can achieve the effect of strong practicability, high prediction accuracy and sufficient theoretical basis

Active Publication Date: 2021-10-12
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a material creep fatigue life evaluation method and evaluation system, which are used to solve the low accuracy of creep fatigue interaction life prediction and the limitation of prediction parameters in the prior art Technical issues related to a particular test condition

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  • Material creep fatigue life evaluation method and system
  • Material creep fatigue life evaluation method and system
  • Material creep fatigue life evaluation method and system

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Embodiment Construction

[0051]Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0052] see Figure 1-9 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily du...

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Abstract

The invention provides a material creep fatigue life evaluation method and system, and the method comprises the following steps: carrying out a creep fatigue interaction test of strain amplitude control on a target material under a preset temperature condition, so as to obtain creep fatigue interaction test data of different strain amplitudes and different retention times; according to the creep fatigue interaction test data, obtaining a corresponding relation between a relaxation stress ratio and retention time and strain amplitude as a first corresponding relation; according to the creep fatigue interaction test data, obtaining a corresponding relation between a relaxation stress ratio and failure life as a second corresponding relation; and according to the first corresponding relation and the second corresponding relation, obtaining the corresponding relation between the failure life and the retention time and the strain amplitude. Creep fatigue interaction life prediction is achieved through the method, limitation of specific test conditions is avoided, and the method has the advantages of being sufficient in theoretical basis, high in prediction accuracy and high in practicability.

Description

technical field [0001] The invention relates to the technical field of material fatigue life prediction, in particular to a material creep fatigue life evaluation method and evaluation system. Background technique [0002] Equipment and components in the fields of generator sets, petrochemical industry, aerospace and other fields have been operating under complex working conditions such as high temperature and alternating loads for a long time. The fatigue damage caused by high temperature and the creep damage caused by high temperature, the two damage mechanisms are not independent, but interact, and the creep fatigue interaction life prediction has become a key factor in the design calculation and integrity assessment of high temperature structures. [0003] At present, the commonly used methods for predicting creep fatigue interaction life are to determine the interaction life according to the damage interaction diagram, such as linear cumulative damage method, continuous...

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Application Information

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IPC IPC(8): G01N3/18G01N3/32
CPCG01N3/18G01N3/32G01N2203/0003G01N2203/0005G01N2203/0017G01N2203/0071G01N2203/0073G01N2203/0226G01N2203/0676G01N2203/0682G01N2203/0688
Inventor 吴海利孙林根余潇张长春
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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