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

A central crack, tensile specimen technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of unresearched effects of incubation period, to simplify the prediction method of incubation period, and the prediction data is accurate and reliable. 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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  • Constraint-considered method for predicting the inoculation period of central crack tensile sample
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  • Constraint-considered method for predicting the inoculation period of central 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 central crack tensile specimen considering restraint of the present invention comprises the following steps:

[0020] S1: Establish a creep incubation period prediction model for a central crack tensile specimen, the model includes a central crack tensile specimen body 1 with a cuboid structure, and upper and lower holes 2 and lower holes are symmetrically arranged at the upper and lower ends of the specimen body. hole 3; a prefabricated crack 4 is inserted in the middle of the symmetrical plane of the sample body, and a constant pressure load is applied in...

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Abstract

The invention discloses a constraint-considered model and method for predicting the inoculation period of a central crack tensile sample, and provides a method for predicting the inoculation period ofthe central crack 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 central crack tensile 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 central crack tensile test specimen (MT) considering the restraint effect, or, when it is determined that the central crack tensile test specimen (MT) is under the crack, evaluate the central crack 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 more i...

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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