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| Research on Nano Measurement Technology of Hydraulic Bulging Based on Mean-Value Energy Equivalence |
| Received:June 29, 2021 Revised:July 21, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.01.017 |
| KeyWord:mean-value energy equivalence hydraulic bulging test stress-strain relationship finite element analysis |
| Author | Institution |
| XIANG Wen-xin |
Taishan Nuclear Power Joint Venture Co., Ltd, Jiangmen , China |
| QI Shuang |
Taishan Nuclear Power Joint Venture Co., Ltd, Jiangmen , China;Southwest Jiaotong University, Chengdu , China;Suzhou Nuclear Power Research Institute, Suzhou , China |
| LIU Xiao-kun |
Southwest Jiaotong University, Chengdu , China |
| FAN Min-yu |
Suzhou Nuclear Power Research Institute, Suzhou , China |
| NING Fang-mao |
Taishan Nuclear Power Joint Venture Co., Ltd, Jiangmen , China |
| CAI Li-xun |
Southwest Jiaotong University, Chengdu , China |
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| Abstract: |
| The uniaxial tensile mechanical properties of materials were obtained based on the hydraulic bulging test technology. In this paper, based on mean-value energy equivalence and finite element aided testing method, a hydraulic bulging test technology is proposed to obtain the mechanical properties of materials under uniaxial tension. The yield stress and strain strengthening index of 20MnD5 pipe material in the Steam Generator (SG) was obtained based on the hydraulic bulging test of small wafer samples. It is input into the finite element to simulate the whole process of hydraulic bulging loading of small wafer sample. The pressure - displacement curve of hydraulic bulging obtained by finite element analysis is basically consistent with the pressure - displacement curve obtained by test. Based on the energy equivalence theory, the hydraulic bulging nanotechnology can obtain the mechanical property parameters of materials in uniaxial tension without a lot of tests, and the test method and principle are relatively simple, which is very convenient for engineering application. |
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