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Experimental data processing method of structural detail fatigue rating experiment

A technology for experimental data processing and structural details, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve clear processing, wide application range, and simple use

Active Publication Date: 2016-01-27
YANGZHOU UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new experimental data processing method for structural detail fatigue rating experiment, in order to solve the problem of obtaining the allowable value of structural DFR according to the experimental data processing under different stress levels

Method used

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  • Experimental data processing method of structural detail fatigue rating experiment
  • Experimental data processing method of structural detail fatigue rating experiment
  • Experimental data processing method of structural detail fatigue rating experiment

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Embodiment 1

[0052] The structure in which a certain web is connected to multiple columns is made of aluminum alloy. According to the test requirements of the present invention, the experimental data of multiple test pieces have been obtained (see Table 1), but the stress levels of each test piece are different. , now it is necessary to calculate the allowable DFR value of the assessment site.

[0053] The specific implementation includes the following steps:

[0054] Step 1, the experiment meets the requirements of the present invention, and the specific data are shown in the table below.

[0055] Table 1. Experimental data

[0056]

[0057] Among them, there are 5 specimens with expected failure in the assessed parts.

[0058] Step 2, calculate the average stress level of the 11 specimens in Table 1, with

[0059] 1 n Σ i = 1 n σ ...

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Abstract

The invention discloses a new experimental data processing method of a structural DFR (Detail Fatigue Rating) experiment, and belongs to the technical field of structural fatigue strength experimentation, analysis and evaluation. The experimental data processing method comprises the following steps: firstly, according to relevant experiment requirements, obtaining the fatigue experiment data, including stress level and fatigue life, of each test piece; secondly, according to different stress levels of the test pieces, selecting a proper reduced stress level; thirdly, aiming at the experiment data of each test piece to calculate to obtain reduced fatigue life corresponding to the reduced stress level on the basis of a stress life conversion formula; and finally, on the basis of a design handbook of a relevant DFR method, obtaining the DFR allowable value of a checked position in the structure. Since the stress life conversion formula is introduced into the method, the experimental data processing method has the advantages of being wide in application range, clear in processing process and simple in calculation method.

Description

technical field [0001] The invention belongs to the technical field of structural fatigue performance experiment testing, in particular to an experimental data processing method for structural detail fatigue rating experiment. Background technique [0002] In actual engineering structures, fatigue failure is the most common form of failure (1. Suresh S., Fatigue of Materials, Beijing, National Defense Industry Press, translated by Wang Zhongguang et al., 1999). The complexity of fatigue damage is that it is strongly affected by factors such as the material of the component, the characteristics of the working load, the type and size (2. Yao Weixing, Structural Fatigue Life Analysis, Beijing, National Defense Industry Press, 2003; 3. Xu Hao, Fatigue Strength, Beijing, Higher Education Press, 1988). Even if the mechanical mechanism of a certain fatigue failure is clarified and the corresponding fatigue analysis method or theory is established, it is often still necessary to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 戴隆超王翔张哲秦超张威俞天
Owner YANGZHOU UNIV
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