Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin
ASME and RCC-M codes specify an elastoplastic fatigue analysis technique: a simplified elastoplastic fatigue analysis method based on linear elastic analysis. In this method, the elastic strain range is multiplied by the elastoplastic correction factor (<i>K<sub>e</sub></i>)...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/6/943 |
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| author | Xuejiao Shao Juan Du Xiaolong Fu Furui Xiong Hui Li Jun Tian Xifeng Lu Hai Xie |
| author_facet | Xuejiao Shao Juan Du Xiaolong Fu Furui Xiong Hui Li Jun Tian Xifeng Lu Hai Xie |
| author_sort | Xuejiao Shao |
| collection | DOAJ |
| description | ASME and RCC-M codes specify an elastoplastic fatigue analysis technique: a simplified elastoplastic fatigue analysis method based on linear elastic analysis. In this method, the elastic strain range is multiplied by the elastoplastic correction factor (<i>K<sub>e</sub></i>) to envelope the actual plastic strain range for fatigue evaluation. The ASME or RCC-M provide the <i>K<sub>e</sub></i> parameters of typical materials, such as austenitic stainless steel and low alloy steel. However, how can the parameters of the material not included in the codes be determined? Based on the existing material Z2CND18.12 (nitrogen control) in the codes and taking into account various sensitive factors, the minimum conservative margin of <i>K<sub>e</sub></i> for this material is calculated, and then the parameters of nonstandard materials are determined iteratively based on the conservative margin. The sensitive factors include the different structure model, load types, the loading control mode, temperature value and the material constitutive model. Based this approach, the <i>K<sub>e</sub></i> parameters of TA16 are determined and verified by the transient with drastic change in temperature and pressure. The results of the case show that the simplified elastoplastic fatigue analysis can envelope the results of cyclic plastic fatigue analysis. The minimum margin approach established in this paper can reasonably determine the <i>K<sub>e</sub></i> value of materials beyond the ASME and RCC-M codes. |
| first_indexed | 2024-03-09T23:04:16Z |
| format | Article |
| id | doaj.art-af0811afd57749609ccc69d0c127df7f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T23:04:16Z |
| publishDate | 2022-05-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-af0811afd57749609ccc69d0c127df7f2023-11-23T17:57:41ZengMDPI AGMetals2075-47012022-05-0112694310.3390/met12060943Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative MarginXuejiao Shao0Juan Du1Xiaolong Fu2Furui Xiong3Hui Li4Jun Tian5Xifeng Lu6Hai Xie7Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaScience and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, ChinaASME and RCC-M codes specify an elastoplastic fatigue analysis technique: a simplified elastoplastic fatigue analysis method based on linear elastic analysis. In this method, the elastic strain range is multiplied by the elastoplastic correction factor (<i>K<sub>e</sub></i>) to envelope the actual plastic strain range for fatigue evaluation. The ASME or RCC-M provide the <i>K<sub>e</sub></i> parameters of typical materials, such as austenitic stainless steel and low alloy steel. However, how can the parameters of the material not included in the codes be determined? Based on the existing material Z2CND18.12 (nitrogen control) in the codes and taking into account various sensitive factors, the minimum conservative margin of <i>K<sub>e</sub></i> for this material is calculated, and then the parameters of nonstandard materials are determined iteratively based on the conservative margin. The sensitive factors include the different structure model, load types, the loading control mode, temperature value and the material constitutive model. Based this approach, the <i>K<sub>e</sub></i> parameters of TA16 are determined and verified by the transient with drastic change in temperature and pressure. The results of the case show that the simplified elastoplastic fatigue analysis can envelope the results of cyclic plastic fatigue analysis. The minimum margin approach established in this paper can reasonably determine the <i>K<sub>e</sub></i> value of materials beyond the ASME and RCC-M codes.https://www.mdpi.com/2075-4701/12/6/943simplified elastoplastic fatigueconservative margincyclic plastic correction factorRCC-M codes |
| spellingShingle | Xuejiao Shao Juan Du Xiaolong Fu Furui Xiong Hui Li Jun Tian Xifeng Lu Hai Xie Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin Metals simplified elastoplastic fatigue conservative margin cyclic plastic correction factor RCC-M codes |
| title | Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin |
| title_full | Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin |
| title_fullStr | Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin |
| title_full_unstemmed | Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin |
| title_short | Simplified Elastoplastic Fatigue Correction Factor Analysis Approach Based on Minimum Conservative Margin |
| title_sort | simplified elastoplastic fatigue correction factor analysis approach based on minimum conservative margin |
| topic | simplified elastoplastic fatigue conservative margin cyclic plastic correction factor RCC-M codes |
| url | https://www.mdpi.com/2075-4701/12/6/943 |
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