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Incubation period prediction method for ring stretching test piece with thickness and crack depth influences considered

A technique for tensile specimens and prediction methods, applied in the application of stable tension/compression to test the strength of materials, special data processing applications, instruments, etc., to achieve the effect of simplifying the prediction steps of the gestation period

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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  • Incubation period prediction method for ring stretching test piece with thickness and crack depth influences considered
  • Incubation period prediction method for ring stretching test piece with thickness and crack depth influences considered
  • Incubation period prediction method for ring stretching test piece with thickness and crack depth influences considered

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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 ring-shaped tensile 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 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 ...

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Abstract

The invention discloses an incubation period prediction model for a cracked ring stretching test piece (CST) and method. A ring stretching test piece model is used, the incubation period is calculatedand extracted, a large amount of analog data is used, a formula is fit, and an incubation period prediction method for the ring stretching test piece is put forward. The method has the beneficial effects of simplifying the ring stretching test piece incubation period prediction step and process.

Description

technical field [0001] The present invention relates to the critical evaluation of the incubation period prediction project of the ring-type tensile test specimen (CST) considering the influence of thickness and crack depth, or, when the ring-type tensile test sample (CST) is determined to contain cracks, evaluate the compact tension The incubation period of the stretched specimen. 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 becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G06F17/50
CPCG01N3/18G06F30/367
Inventor 徐连勇邬栋权荆洪阳韩永典赵雷吕小青
Owner TIANJIN UNIV