Method for predicting elastic stress and strain of thick-wall cylindrical shell in presence of hydrogen

A prediction method and elastic stress technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as difficult to generalize, no stress-strain method for hydrogen cylindrical shells, and high quality requirements for researchers.

Active Publication Date: 2017-01-04
ZHEJIANG UNIV
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Problems solved by technology

Due to the complexity of the hydrogen damage constitutive relationship, the existing methods for predicting the mechanical response of materials in a hydrogen environment require high quality researc

Method used

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  • Method for predicting elastic stress and strain of thick-wall cylindrical shell in presence of hydrogen
  • Method for predicting elastic stress and strain of thick-wall cylindrical shell in presence of hydrogen
  • Method for predicting elastic stress and strain of thick-wall cylindrical shell in presence of hydrogen

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Embodiment Construction

[0042] the following to figure 1 And the example shown in Table 1 is the implementation object, and the present invention is described further.

[0043] figure 1 The example shown is a thick-walled cylindrical shell bound at both ends, with inner and outer radii a and b, respectively, subjected to a constant internal pressure load p, with a concentration c in the unstressed state 0 The hydrogen is uniformly distributed in the cylindrical shell. The invention can predict the stress and strain of the cylindrical shell in the hydrogen environment under the action of internal pressure p.

[0044] Table 1 Material parameters and geometric parameters used in the example

[0045]

[0046]

[0047] The realization process of the inventive method is as follows:

[0048] Step 1: Select a radius r (a≤r≤b), for example, take r=a, and bring the inner radius a, outer radius b and internal pressure load p in Table 1 into the following formula to calculate the circumferential direct...

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Abstract

The invention discloses a method for predicting the elastic stress and strain of a thick-wall cylindrical shell in the presence of hydrogen. According to the method, based on the hydrogen embrittlement HELP theory, the elastic stress and strain of the cylindrical shell in the hydrogen environment are directly predicted with the elastic stress and strain of the cylindrical shell in the atmospheric environment. Compared with an existing method for predicting structural stress and strain in the hydrogen environment, the method has the advantage of being simple in principle. Compared with an existing method for predicting the elastic stress and strain of a cylindrical shell, the influence of the hydrogen environment on the stress and strain of the cylindrical shell is considered, and the method has certain reference value for engineering design.

Description

technical field [0001] The invention relates to the field of elastic response prediction of hydrogen bearing structures, in particular to predict elastic stress and strain of thick-walled cylindrical shells based on HELP theory of hydrogen embrittlement. Background technique [0002] Cylindrical shells are key pressure-bearing components in the process of hydrogen storage and hydrogen transportation in hydrogen systems. Determining the elastic response of thick-walled cylindrical shells in hydrogen environments is an issue that must be considered when designing hydrogen storage tanks, hydrogenation reactors, and other hydrogen-facing equipment. . Due to the complexity of the hydrogen damage constitutive relationship, the existing methods for predicting the mechanical response of materials in a hydrogen environment require high quality researchers and require a lot of programming work, which is difficult to promote in engineering. There is no specific method for predicting t...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 陈志平黄淞徐烽郑晨超
Owner ZHEJIANG UNIV
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