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Method for predicting incubation period of annular tensile sample with consideration of restraint

A technique of tensile specimen and prediction method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unresearched effects of gestation period, and achieve simplified gestation period prediction methods and accurate and reliable prediction data. Effect

Inactive Publication Date: 2019-07-02
TIANJIN UNIV
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Problems solved by technology

However, the application of this prediction model involves a large number of complex calculation processes and has a certain degree of conservatism, and there are certain limitations for the application of actual components.
Moreover, the effect of the restraint effect of the structure on the incubation period has not been studied; in recent years, researchers have conducted a lot of research on the influence of the restraint effect on the growth of creep cracks.

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  • Method for predicting incubation period of annular tensile sample with consideration of restraint
  • Method for predicting incubation period of annular tensile sample with consideration of restraint
  • Method for predicting incubation period of annular tensile sample with consideration of restraint

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In this embodiment, P92 high-temperature heat-resistant steel is selected.

[0019] The method for predicting the incubation period of the ring-shaped tensile sample considering restraint of the present invention comprises the following steps:

[0020] S1: if figure 1 As shown, the incubation period prediction model of the ring-shaped tensile sample is established under high temperature conditions, and the prediction model includes the ring-shaped tensile sample body 1, and the upper hole 2 and the upper hole 2 are symmetrically arranged on the ring-shaped tensile sample body. In the lower hole 3, a prefabricated crack 4 is inserted in the symmetrical plane of the ring-shaped tensile ...

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Abstract

The invention discloses a model and method for predicting incubation period of an annular tensile sample with consideration of restraint, and provides a method for predicting incubation period of theannular tensile sample by utilizing a large amount of simulation data and a fitting formula. The method has the beneficial effects that the method for predicting the inoculation period of the annulartensile sample is simplified, constraint parameters are considered, and prediction data are more accurate and reliable.

Description

technical field [0001] The present invention relates to the critical evaluation of the incubation period prediction project of the ring-shaped tensile test sample (CST) considering the restraint effect, or, when it is determined that the ring-shaped tensile test sample (CST) is under the crack, evaluate the ring-shaped tensile test sample (CST) Such a gestation period. Background technique [0002] Components and equipment serving in high-temperature environments will inevitably have various defects during production and service. The initiation and propagation of creep cracks is a major failure mechanism of high-temperature components containing defects and leads to failure before the design life. The incubation period of creep cracks occupies a large proportion in the service life of high-temperature components. In order to ensure the reliability of components serving in high-temperature environments, the research on the incubation period of creep cracks becomes more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 徐连勇邬栋权荆洪阳韩永典赵雷吕小青
Owner TIANJIN UNIV