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Constraint-considered method for predicting inoculation period of bilateral crack tensile sample

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.

Method used

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  • Constraint-considered method for predicting inoculation period of bilateral crack tensile sample
  • Constraint-considered method for predicting inoculation period of bilateral crack tensile sample
  • Constraint-considered method for predicting inoculation period of bilateral crack tensile sample

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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 incubation period prediction method of the bilateral crack tensile specimen considering restraint of the present invention comprises the following steps:

[0020] S1: if figure 1 As shown, the creep incubation period prediction model of the bilateral cracked tensile specimen is established, the model includes the bilateral cracked tensile specimen body 1 of the cuboid structure, and the upper and lower ends of the bilateral cracked tensile specimen body are symmetrically arranged The upper hole 2 and the lower hole 3; the prefabricated cracks 4 are inserted at the left and right ends of the transve...

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Abstract

The invention discloses a constraint-considered method for predicting inoculation period of bilateral crack tensile sample, and provides an inoculation period prediction method for the bilateral cracktensile 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 bilateral cracktensile sample is simplified, the constraint parameters are considered, and the 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 double-sided cracked tensile specimen (DENT) considering the restraint effect, or, when the double-sided cracked tensile specimen (DENT) is determined to contain cracks, evaluate the double-sided cracked tensile test 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 ...

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