Fatigue Strength Evaluation for Remanufacturing Impeller of Centrifugal Compressor Based on Modified Grey Relational Model
| Autor: | Bowen Shi, Sun Kepeng, Sun Qingchao, Xiaokai Mu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Article Subject business.industry 05 social sciences Reference data (financial markets) General Engineering 050301 education Experimental data 02 engineering and technology Structural engineering Residual Fatigue limit Impeller 020901 industrial engineering & automation Relational model TA401-492 General Materials Science Target strength business 0503 education Remanufacturing Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2020 (2020) |
| ISSN: | 1687-8434 |
| DOI: | 10.1155/2020/1236130 |
| Popis: | The fatigue strength, as the essential basis of residual life evaluation, is required to be obtained timely for remanufacturing. Since impeller damage is characterized with very-high-cycle fatigue (VHCF), it is difficult to directly test the strength data. The transformation method of multisource strength data is proposed to predict fatigue strength for impeller based on grey relational theory. The multisource strength data, as factor space, primarily include available existing experimental data and operating data, while the strength data of the remanufacturing impeller are taken as target data. The fatigue strength model of material and component are presented to analyze the influence factors of remanufacturing target strength. And similar material provides a theoretical basis for selecting reference data reasonably. Considering the correlation and difference between available data and target data, the grey relational function is established, and the correction function of the target residual is brought forward to reduce the transformation deviation. The entropy-weight theory is implemented to determine the different impacts of multisource data on target strength. A test case, predicting the unknown impeller fatigue strength with various impellers, is applied to validate the proposed transformation method, and the results show that the predicted strength data are consistent with the experimental data well. |
| Databáze: | OpenAIRE |
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