| AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRA DISTRIBUTION AT CRACK TIP |
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| 作者姓名： | WEI Xuejun ZHOU Xiangyang LI Jin LIU Guanglei KE Wei Corrosion Science Laboratory Academia Sinica Institute of Corrosion and Protection of Metals Academia Sinica Shenyang China Institute of Corrosion and Protection of Metals Academia Sinica Shenyang China |
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| 作者单位： | WEI Xuejun ZHOU Xiangyang LI Jin LIU Guanglei KE Wei Corrosion Science Laboratory，Academia Sinica，Institute of Corrosion and Protection of Metals，Academia Sinica，Shenyang，China Institute of Corrosion and Protection of Metals，Academia Sinica，Shenyang 110015，China |
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| 摘 要： | A computerized digital speckle-interferometry(SPI)system has been set up to determinethe in-plane distribution of displacement and strain at crack tip of CF specimens.Theprinciple and the experimental method of this technique are described in detail.Theeffect of corrosion factors on plastic deformation at crack tip in CF process has beenexamined by comparing the near-tip strain fields of steel A537 before and after hydrogencharging,and of pure copper before and after applying an anodic current in 3.5% NaCl.The results shows that the clasic finite element mathematical models are not suitable todescribe the near-tip deformation under the experimental conditions.Hydrogen chargingmade the crack tip plasticity decreased for steel A537 and the anodic dissolution enhancethe near tip deformation of pure copper specimen.
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| 收稿时间： | 1993-12-11 |
| 修稿时间： | 1993-12-11 |
AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRA DISTRIBUTION AT CRACK TIP |
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| WEI Xuejun ZHOU Xiangyang LI Jin LIU Guanglei KE Wei Corrosion Science Laboratory,Academia Sinica,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang ,China.AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRA DISTRIBUTION AT CRACK TIP[J].Acta Metallurgica Sinica(English Letters),1993,6(12):453-458. |
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| Authors: | WEI Xuejun ZHOU Xiangyang LI Jin LIU Guanglei KE Wei Corrosion Science Laboratory Academia Sinica |
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| Affiliation: | WEI Xuejun ZHOU Xiangyang LI Jin LIU Guanglei KE Wei Corrosion Science Laboratory,Academia Sinica,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China |
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| Abstract: | A computerized digital speckle-interferometry(SPI)system has been set up to determine the in-plane distribution of displacement and strain at crack tip of CF specimens.The principle and the experimental method of this technique are described in detail.The effect of corrosion factors on plastic deformation at crack tip in CF process has been examined by comparing the near-tip strain fields of steel A537 before and after hydrogen charging,and of pure copper before and after applying an anodic current in 3.5% NaCl. The results shows that the clasic finite element mathematical models are not suitable to describe the near-tip deformation under the experimental conditions.Hydrogen charging made the crack tip plasticity decreased for steel A537 and the anodic dissolution enhance the near tip deformation of pure copper specimen. |
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| Keywords: | speckle-interferometry corrosion fatigue crack tip deformation |
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