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A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material

A prediction method, a high-chromium steel technology, applied in the analysis of materials, the use of repetitive force/pulse force to test the strength of materials, measurement devices, etc., can solve the model response mechanism is unclear, the material parameters cannot be determined, and the internal variables interact with each other. , simultaneous changes, etc.

Active Publication Date: 2018-12-04
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0007] 2. The determination of material parameters in the model will also be a difficult problem in more complex constitutive models
Especially for a unified constitutive model containing multiple internal variables, under complex load conditions, the internal variables may interact and change simultaneously, making the response mechanism of the model unclear and material parameters uncertain

Method used

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  • A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material
  • A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material
  • A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material

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Embodiment Construction

[0135] The present invention will be described in further detail below in conjunction with specific embodiments.

[0136] The invention aims to provide a systematic solution for fatigue and creep deformation prediction and multi-mechanism damage analysis of high chromium steel materials. The content of the program includes the establishment of theoretical models, the determination of material parameters, the design of numerical integration algorithms, and the damage analysis of components. The program will pass figure 1 The implementation of the technology roadmap shown specifically includes the following steps:

[0137] 1) Based on the nonlinear viscoelastic-plastic theory, establish a unified constitutive model for high-chromium steel materials at high temperatures, simulate the local thermodynamic response of the material during the entire loading process, and at the same time fatigue, creep and their interactions Analyze the damage caused. The theoretical model establi...

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Abstract

A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material is disclosed. The method includes constitutive model building, material parameter determination, numerical integration algorithm designing, damage analyzing, and the like. Compared with the prior art, the method can accurately simulate thermodynamic responses of the high-chrome steel material under different loading conditions, and can analyze fatigue, creep and fatigue-creep mutual damage of the material, thus providing a more reasonable and reliable theoretical model for service lifetimeprediction and safety design standards of supercritical generator unit components operated under complex changeable environments.

Description

technical field [0001] The invention relates to the technical field of safety design and remaining life prediction of high-temperature and high-pressure components used in supercritical generator sets, and in particular to a method for predicting thermodynamic response and fatigue-creep damage of high-chromium steel materials. Background technique [0002] In order to ensure the safe and stable operation of high-temperature and high-pressure components in generator sets, components are usually made of creep-resistant alloy materials. Among them, high-chromium steel, as a new type of creep-resistant alloy material, has excellent performance under high-temperature and high-pressure conditions. It has been widely used in the manufacture of high-temperature and high-pressure equipment in supercritical power plants, and is regarded as the next generation of ultra-supercritical Ideal material for generator sets. [0003] Under high temperature and complex loading conditions, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32G01N3/00
CPCG01N3/00G01N3/32G01N2203/0005G01N2203/0071G01N2203/0073G01N2203/0075G01N2203/0226G01N2203/0252
Inventor 王炯蔡晓丹
Owner SOUTH CHINA UNIV OF TECH
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