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Method for predicting incubation period of unilateral crack bending sample by considering influence of thickness and crack depth

A forecasting method and incubation period technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of simplifying the forecasting steps

Inactive Publication Date: 2019-07-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Method for predicting incubation period of unilateral crack bending sample by considering influence of thickness and crack depth
  • Method for predicting incubation period of unilateral crack bending sample by considering influence of thickness and crack depth
  • Method for predicting incubation period of unilateral crack bending sample by considering influence of thickness and crack depth

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Embodiment Construction

[0019] 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.

[0020] The method for predicting the incubation period of the unilateral crack bending sample considering the influence of thickness and crack depth of the present invention comprises the following steps:

[0021] S1: if figure 1 As shown, the incubation period prediction model of the unilateral crack bending sample under high temperature conditions is established, the model includes a unilateral crack bending sample body 1 of a cuboid structure, and a prefabricated crack 2 is inserted at the bottom of the longitudinal symmetrical plane of the sample body, Different constant loads are applied to the middle pa...

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Abstract

The invention discloses a method for predicting the incubation period of a unilateral crack bending sample by considering the influence of thickness and depth, which comprises the following steps: calculating and extracting the incubation period by using a unilateral crack bending sample model, and proposing the method for predicting the incubation period of the unilateral crack bending sample byusing a large amount of simulation data and a fitting formula. The method has the beneficial effect that the step of predicting the incubation period of the cracks of the unilateral crack bending sample is simplified.

Description

technical field [0001] The present invention relates to the critical evaluation of the incubation period prediction project of the unilateral crack bending specimen (SENB) considering the influence of thickness and crack depth. The incubation period of cracked bent specimens. 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 important. Creep initiation is defined as the time when microcracks (or pores) first conne...

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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